First light and thoughts on the Orion Optics CT10. 10" Ultra Newtonian. Incl Zygo wavefront report
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- Опубліковано 18 вер 2024
- First light and thoughts on the Orion Optics CT10. 10" Ultra Newtonian.
My first thoughts and overview of the Orion Optics UK CT10 scope and a first light on the PACMAN Nebula
Set up my new scope with an EAF, filterwheel, OAG and ZWO 294mm pro and took my first light on NGC281 Pacman Nebula. I managed 8.5 hrs of 5 min subs of narrowband SHO.
Processed the image in Pixinsight and I think the results are great.
The OOUK scopes come with a Zygo wavefront analysis report which is a really nice touch and makes you feel you have bought something special.
www.Astrobloke.co.uk Where you can view all my images and order prints.
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Mounts
Sky Watcher EQ8R PRO bit.ly/39HVTpR
Sky Watcher EQ6R Pro bit.ly/3i1afU0
Sky Watcher HEQ5 bit.ly/2Ty7BeZ
Sky Watcher AZ GTI bit.ly/3iGmIvC
Cameras
ZWO ASI 294MM Pro bit.ly/2VbxNN6
ZWO ASI 183MM Pro bit.ly/3kSLPOs
ZWO ASI 290mm mini bit.ly/2UO71u6
ZWO ASI 120mm mini bit.ly/2Twjceu
Filters
Antlia 3nm bit.ly/3GhuaZl
Antlia LRGB bit.ly/3MDdca8
Chroma Oiii 3nm 1.25" bit.ly/3rviomS
Chroma Ha 3nm 1.25" bit.ly/2Wcsnlj
Optolong LRGB 1.25" set bit.ly/36ZtXJq
ZWO EFW Electronic filter wheel bit.ly/3fbmKe3
Telescopes
RC8 bit.ly/3x5AexT
Sky Watcher 130PDS
Zenithstar 61 bit.ly/2UEgFjc
William Optics 50mm guidescope bit.ly/36ZLYHK
Correctors
Sky Watcher 0.9Coma Corrector
Baader MPCC bit.ly/2V76LpZ
Astro Essential 0.75Reducer
William Optics Flat61A bit.ly/3zw9sAf
William Optics Flat 61R bit.ly/3BEvaEj
Accessories
Pegasus Astro pocket powerbox advance bit.ly/3iMFeSO
ZWO OAG Off Axis Guider bit.ly/3i1RIqD
ProLogik balance meter and tuning tool
www.prologik-a...
The meter is of a high quality and works really well. Not only is it great for helping to find perfect balance in stiff mounts but it is a fantastic aid to fine tuning your mount for the best guiding. It will assist you in adjusting your worm drive/gear mesh to the optimum setting and giving you great smooth tracking and excellent guiding numbers.
Awesome video Glenn! The intro was hilarious and thanks for the mention! Also loved the outtakes and of course the final first light image! You smashed that target man!
Thanks Joe. Always a gamble attempting Humour. Was really pleased with the final image detail especially as only 8.5 hours.
That scope is a beast! I would be intimidated by it. Awesome shot on that very rare target... love the colors.
Also, that intro was hilarious. A big thank you to Mrs Astrobloke for the call out. CS!
Thanks James. Glad you liked the intro, the shout out well deserved, your Pacman was brilliant
Gotta love those outtakes Glenn always love it when you're looking into the camera and the mind goes blank. Looks like a real nice piece of gear. What you said reminds me of my Uncle's in the UK who restore vintage British bikes/cars. They always tell me they enjoy the challenge of finding ways to fix things as much as they do the final result. Clear skies.
Thank you Ollie. I am a biker at heart (if the T shirt wasn’t a big enough clue lol) many a motorcycle fixed or modded in some way. Has definitely helped me with all my tinkering
We’re pleased to hear that you enjoy it, Glenn!
Love it and looking forward to the VX6 I ordered to keep it company in the new 2 pier Obsy I am just starting to build.
@@Astrobloke Brilliant news, let us know 😁
@@orionoptics_uk i will. As soon as its built and I have the scope installed I plan to release some videos on it.
Good one Glenn. Well, if it would make you feel better, I have not imaged the Pacman ... yet. It's on my list for later this week though. Wow, what a fantastic First Light image!
Thank you Pat. Its a nice target actually and look forward to seeing yours. Clear skies
Love my CT10, welcome to the club!
Thank you. I love it too, can I ask what camera you use with it
Excellent video, love the outtakes
Glad you like them!
I was looking around to up the reach of the 6" newt, and stumbled across your video. After much debate, ordered a CT10. It's a stunner! If only Orion could do something about the clouds down in Oxfordshire!
Hi John and congrats. I love mine and is in permanent use. I recently got hold of the Starizona Nexus coma corrector. Not cheap but wow. With it the CT10 is 900mm and a really quick F3.6. Really pulls in the light and detail. Only consideration is at the faster speed some filters can halo due to filter shift. My Antlia Sii can’t handle that speed. I have a 3nm SHO set from Altair and they are fine so there are filters that are unaffected. Anyways best of luck and thank you for watching
First light? first wow. Great image and I loved your bloopers at the end, so funny
Thank you claire ....oh no is that another pacman I see as your tag lol
Superb looking scope, Good luck with it.
Thank you. Its really delivery some fantastic results. Will have some images to share soon
That final image was awesome Glenn, really nice. Got a good scope there. Loved the bloopers at the end.
Great video mate!
Thanks Ben. I think its a great scope but then it should be......... The bloopers prove I am human. I am sure we all have hours worth lol
The dew heaters I put on mine are Kendrick, primary and secondary, on the back of the mirrors. You don't need a dew shield (believe me), that will unnecessarily extend the length of the tube. If you want to offset the balance I'd just add a weight near the focuser, maybe add a sleeve inside the tube near the secondary. Anyway, great to see you are so pleased with your new scope.
John at Orion Optics has always been a pleasure to deal with.
Looking forward to some more beautiful images.
Clear skies. 👍
Hi Jon. Thank you for the advice. The dew shield was just a thought and it would have been very short but I wasn't definite on one. I am moving my pegasus powerbox to the scope which will help give me a little more weight to play about with. The optics are so nice on this, I really noticed a much higher contrast to my subs. love it
Love the bloopers Nick !! ...keep 'em coming !!
Thank you James, glad you enjoyed it
Great image Glenn, loved the intro and the outtakes. so very good!!
Thanks Jason. Had some fun making the video. Need to make myself look more windswept and interesting
Great video Glenn!
This has me even more pumped up about my CT8.
Thanks for dropping by and commenting. I know you are going to love how that will perform. Look forward to seeing your images. Clear skies
Looks a fantastic telescope Glen and love the carbon fibre ! Final image is absolutely superb 👌 really funny intro 😄
Thank you Paul for your kind comments, really appreciate your support
Love the video. Great sense of humor. Thanks
Thank you Salomon
Great video Glenn. Never thought too much about Newtonians but that looks like a really nice and well built scope. Great initial image . Lookng forward to your future work with that rig.
Hi Richard and thank you. I think the good thing about Newtonians is you get a lot of scope for your money. They have negatives though, if you don't have an observatory and permanent set up they are large and can be heavy, they catch the wind easily. But I like them and my new one is blowing me away with the images it is giving me.
Great to see your follow-up Glenn! Very helpful!! Have a great week! :) Definitely be great to see the 130PDS shoot-out! :)
Thank you. I will be doing a shoot out as soon as the clouds I cursed upon myself leave lol
nice skit at the start i think it makes a video more fun. Didnt know it was the same weight as the steel version. Joe
Thanks Joe. I was surprised too
Hi Glenn good intro, lovely scope there. And a spectacular image mate 👌💯
Cheers Mitch i was happy with it all for once lol
Great review of the new scope Glenn, super interesting and the first light image was awesome - I have to agree the carbon OTA looks incredible! (I decided to not capture the pacman nebula at the moment … )
Thank you mate. The image came out well, so much better than last years first try. Thank you for keeping it rare lol
Great video mate, the scope looks amazing... I bet it's not the easiest scope to move around in the rings, it's a beast. Loved the pacman image, also like the whirlpool galaxy framed on the wall, it look great there.
Thanks Russell. It is a bit of a wrestling match I am not sure I am convincingly winning lol
The picture has since been stolen by my wife for her workplace. At least its getting seen by more eyes. Never know my be able to sell some
Very funny. Love the outtakes
Hey Glenn, I'm at work at lunch, that was funny intro to your video, nice one bud 😁🌠
Hi Corin. Glad you liked it mate. Now did you wait until right to the end? After the credits there are some more outtakes. Clear skies mate
@@Astrobloke yes I did Glenn, it was great , let's hope for some clear skies bud 🙂🌠
Sound. Been looking forward to this.
Thank you Jon
Hey Glenn! - that was a wonderful overlook and first light, cracking image by the way!!
It'd be interesting to see that 130pds vs OO CT10 comparison but I'd feel bad for you having to get the scopes swapped around again, it's a fair bit of work haha!
The outtakes at the end were brilliant by the way hahah, I feel your pain :P
Great work as always, I know that you are putting a lot of effort into making this content man and it really shows, top job :-)
Thank you Luke. I won't be swapping scopes around thankfully as I have the HEQ5 I can use the 130PDS on. That will help as well because they can be on the same target at the same time.
Not shown any outtakes before and believe me I have a lot as I am sure we all do lol.
Yes its work as I know you are completely aware but I am having fun and it keeps me out of trouble.
Clear skies mate
Good video and getting better (not sure about the 'Astrobackyard' music over you talking, was a bit distracting). Interesting to see how the inbuilt heating works - warm air currents and all that. Assumed fans were the way to go, however then you end up with light leaks (urban environment), vibration and more air current issues (there are a few threads on pushing vs pulling and different effects). Pacman is a stunner, did it last year with my 200PDS at 908mm so similar result.
Thank you Phil. Its difficult when trying to be creative to get the right balance. Some like the music some hate it, Some want it louder, some don't like the choice etc etc.
I wouldn't use the fans while imaging because of possible vibrations but they seem very quiet and smooth. I would just use them after a hot day to help cool the mirror before use. Not noticed any heat causing issues but they don't get that hot, just warm enough to prevent dew forming. I have it plugged into a pegasus powerbox advance which has a temp and humidity sensor and only applies enough power to the heaters that's needed.
Is your pacman on show anywhere? would love to see it
Ah, fans for cool down on the bigger otas like yours of course I can see that. At 200mm and permanently outside its not an issue, just dew and icing on the primary (which apparently doesn't happen, could have fooled me!).
Mine is permanently outside too so i doubt the fans are needed or will get used. They do cause light leaks so I am going to cover them. Never had ice but when its bad dew has formed on the primary of my 130pds. I have a dew tape now on the bottom and its stops that. Having that feature built into the scope was a nice neat option.
What an great and entertaining video! Love it 😂
Hi Jens and thank you for taking the time to watch and comment. Glad you enjoyed it.
Congratulations on an awesome scope! Fantastic image! And yes, I would like to see a comparison between your 2 Newtonians. Btw, I love Newtonians too :). Greetings from Belgium. Clear Skies! 👋😀🔭🌠🌌
Hi Beatrice, Thank you. I will definitely do a video shoot out as soon as I can. Good to meet a Newtonian fan, clear skies
Haha I love some good humor in the astro community! And nice image too. Guess what I was shooting, trying out my brand new ASIAIR Plus 😇😅
Hi Martin, thank you. How is the new ASIAIR plus? good I hope. Shall I look forward to an image of the Pacman???
@@Astrobloke Well... as with all new gear I got a fair amount of Cumulus Purchasus... So the image was not that good. Not for a video at least. I'll post it on Twitter
Excellent work Glen, I'm very jealous!
Thank you David.
Hello from Eastwood observatory
Hello. Eastwood, how cool. Always nice to meet fellow astrophotographers, especially local.
Outstanding!🔭👏
Thank you Ron
The first image from this scope looks awesome. Money well spent I reckon. The Pacman nebula?..... yeah never heard of that one being imaged before ha ha (enjoyed the humour and bloopers in the video :) )
Thank you Logan. Its a very nice scope and captures great subs. We shall sort you out remoting in soon as I really want to repay the favour you gave me.
@@Astrobloke sounds good
Great video Glenn, lovely looking scope, I like the carbon fibre versions, I looked at getting the Explore scientific ED Apo 102 carbon fibre scope, but ended up with the Esprit 120! I think you could start a riot if you filmed angle grinding Astro gear😁 Amazing final image mate, it sure is a beautiful scope with great optics👍 Hilarious out takes! Clear skies
Congrats btw Glenn on over 2k subscribers 👍
Thank you Simon, your support and comments are great as always. I must sort out coming to see you again soon, want to see all your great gear.
@@Astrobloke That would be great Glenn, will look forward to that mate!
I managed to pick up a used CT8 this week which I can't wait to get up and running. I've already discovered the third axis balance issue and I'm amazed how sensitive it is (my 200 PDS had no problems there). I just wondered if you have ever felt the need to put a mask on the primary mirror? The clips look huge on mine and a mask improved the 200 PDS 100%. Cheers. Mark
Hi Mark. Congrats on your purchase, lovely scope. It took me a little while to balance but once done its sorted. I know what you mean by the size of the clips. They have never caused an issue with the CT10 I have but thats a big old mirror i suppose you will have to see what it does with which camera you use. Fitting a mask on top of the clips is pretty simple and could get you one printed if you don’t have access to a 3d printer. Look forward to seeing your captures
Like you as received my CT8, I just disappointed about the quality of miroir
My secondary miror is not l/6 but 3l 🤔
I decided to buy an artisanal miror
Thats surprising. I have been very happy with my CT10. The images it is returning are some of the best I have taken.
Hi Glenn, My CT10 is due next month so have enjoyed you're thoughts of the scope. I note you're using an off axis guiding setup. Is there a reason for this compared to a separate guide scope and secondly what make is the off axis guider kit you have?
Your right arm is more tan than your left. My left arm is more tan than my right. 😄 Glad your scope is working out. I. See you are going to one up Joe's 8" Edge with a 9.25" if you follow through.
Hi Bruce. The arm is always a giveaway of which side of the road we drive lol. Will take a while for the Astro budget to recover but i would like a 9.25, oh yes
Nice scope. One thing that genuinely surprised me though is that OO are still using the same spider that they used in the GX250 (which i have) that is almost 30 years old and i didn't particularly rate it as a good spider in the GX250 let alone a scope that costs about 2 grand. Still, seems to be working just fine.
I suppose the adage if it isn’t broke don’t fix it stands. Surprised though. I can’t say I have any complaints with it. I do love the scope, it just gives me such amazing images, very happy. Thank you for watching and.taking the time to comment. Clear skies
Great scope. I've been looking at either the CT8 or the VX8. There is a big price difference between the two but with the ability to upgrade the optics in the VX8, the only difference I can see is the carbon fibre tube. I'm sure I must be missing something ?
Hi John. They are lovely scopes. I cannot compare as I only have the CT10 but I am planning on getting a VX6 soon so will know what differences there are. To be honest its about the mirrors really and you can pay for the upgraded ones for not too much more. Good luck with your choice and clear skies
Great image Glenn, it’s like everyone doing Pac-Man …it was so well placed.
With the 0.9 reducer …it’ll would be my ultimate scope. Wonder if 250pds has the same issue ? 🤔.
130pds vs OOuk would be nice comparison.
A piece of kit like that is in good hands.
Enjoy and congratulations
Thank you so much. I doubt you would have an issue with a sky watcher scope. The focuser on this is very low which may be part of the reason, I am sure I will find a solution, I normally do.
@@Astrobloke
Grinder … but don’t make a video of it. 😉
@@padraigfarrell7150 not sure I could stop myself……😈
Have fun with your new equipment and the disagreement after the unpacking video we leave behind us; but for now, I'm sticking to my Sky watcher 150/750 that I'm going to mount tomorrow instead of my zenitstar 61 on my HEQ5; if I want to buy something bigger I also have to buy a new mount and I think that then my suitcase may be at the door we have to keep the church a bit in the middle. LOL
Greetings Frank from Belgium
Hi Frank, never worried about disagreements, everyone has a right to their opinion. The Sky watcher scopes are great and I still love and will continue to use my 130Pds. Funnily I have also just mounted my Z61 to my HEQ5 as starting a brand new project (top secret)
The hobby can sure get expensive, deep money pit for sure. I have certainly spent my budget for the foreseeable future lol
Clear skies
Haha, love the wife interrupt!
Thank you, we tried to have some fun.
First time collimation is always like the firts girl one kissed (or fumbled her face with yours) but mostly fun after.
I agree, luckily this was a pleasant experience lol...I shall be back for more
Curious about something. How did you fit the OAG into the imaging train. I was quoted that the back focus is roughly 44mm from the retracted focuser. I can't seem to find room for it.
I know my OAG has to be flush with the top of the focus tube. Are you using a coma corrector? I use the Baader MPCC MkIII which is a good one for this scope as it can be fully inserted into the focus tube.
Hi, just saw your video, a question, I have a similar telescope but need to set it up, I wanted to ask how did you collimate the mirrors , this is what set be back to build it. Thanks Charles
Hi Charles. I have a Howie Glatter laser and a Tublug which gives me a Barlowed laser collimation tool. I always finish off my collimation with defocussed star. Hope this helps
Great video and a wonderful scope Glenn! How does the EQ6 handle the scope? This scope is heavier and longer than your previous scopes. I have the older NEQ6 mount version and am considering a similar scope. Thank you
Not bad at all. Guiding mostly at 0.6 . I would like it to be better but I think the size and weight tests the mount. I plan on buying an EQ8 R PRO but thats going to take me a good year to save up
Hello Glenn, do you use a coma corrector with your CT-10? If so which one? I have an OOUK VX8- PV10. From the images I have done so far it would benefit from a coma corrector.
Hi John. Yes I do and use a Baader MPCC MKIII.
Does a great job. Can I ask how you find the VX8 as I am thinking of getting a VX6 soon.
@@Astrobloke Thanks for that information Glenn. I am thinking of getting an Explore Scientific coma corrector. I have only used the VX8 on two occasions so far and I had some balance issues and I realised I would need a coma corrector, so I have not seen it at its best so far. It has a great mirror with a Strehl ratio of 0.991. The scope gave some lovely clear views of Saturn a few nites ago. I will give you more information when I get a bit more experience with the VX8.
@@johndoody8413 thank you. Newtonians can be tricky to balance, its always the 3rd axis balance that catches most people out.
What camera are you using for the scope and would I need an adaptor?
I mainly use my 294mm pro on this scope and sometimes the 2600mm pro. They just need nose pieces to go inside the focus tube and preferably with a coma corrector. If you are using a dslr there are adapters that fit on the top of the focuser.
I would really appreciate the comparison of the CT 10 and the SW 130 PDS since I own a SW 130 PDS and I'm thinking about upgrading to larger scope. Many thanks in advance!
I will try and do something as soon as I can. Kind of intrigued myself. Thank you for commenting
Could I ask if you modified your focuser to hold the image train? I have the CT8 with same focuser and with only camera ZW02600 and filter drawer the focuser inner tube rocks back and fourth? Im looking to swap it out for a Steel trak when they become available but if you have any tips / suggestions
No mods. I make sure the inner sleeve is all the way in as any unnecessary length will cause more tilt. Its not the best focuser. I think many get a moonlite or steel trak
Which coma corrector do you use if you don't mind me asking
@@markhill8218 the Baader MPCC MKIII
Glen do you need a coma corrector with this scope? They don't offer one.
That is a very good question Robert. I took my first light with one the Baader MPCC mark III. I will be sure to try without one and see what the starfield looks like and report back to you. Raining right now......
@@Astrobloke I had to use a coma corrector (Baader) on my 250/1200 skywatcher...stars are elongated on the edge - Richard _ Belgium
@@Astrobloke Thanks
So what is your opinion of OOUK? From the forums it seems that they have a pretty spotty reputation. Does the mirror seem to perform as it is advertised ? That is one of the complaints that people have.
The problem with forums is I find people are very quick to complain but slow to praise. My personal thoughts are its an excellent scope and I am very happy with it. I have many other videos showing images that it has captured and they show its a very good scope and out performs many that cost a lot more
@@Astrobloke Good to hear. I have been considering one. Seems from the forum it was mentioned that they did have a bad apple in their bunch who was sending out bad mirrors at that time. So it was said. I was ripped off by B&H Photo here in the States so I am a bit cautious in where I buy. Seems there are not many options for premium newtonians
@@lornaz1975 its not great if you have had a bad experience. The scope I bought comes with a zygo analysis report and that said it was an excellent mirror. I really cannot fault it. When ordering it doesn’t cost much to upgrade the mirror to 1/10th PV. I obviously can only comment on my personal experience but for me the only complaint I had was it took longer to make than quoted but it was worth the wait
@@Astrobloke If your experience with the mirror matches that Zygo report then good. The reports (at the time, they may have corrected the issue) had the performance of the mirrors not matching the reports.
Like I said I'm just a little cautious nowadays. Just wanted your opinion since you have one. If you are interested I'm sure you can research what everyone was talking about at the time. Of course Cloudy Nights.
Thanks for your input on the issue.You have given me more confidence in the scope.
Hi late comment. I got a CT8 and have same issue re focusing.
With Skywatcher aplanatic corrector (the long one) I am unable to focus as the focuser is racked right in and still out of focus with 55mm backspace.
This is the first telescope out of many that I have this issue. This is totally is naff if you ask me. The last thing you want to do with a brand new scope is start fixing it.
I noticed that TS-Optics do Newts with an Orion UK main mirror. This has TS-Optics carbon tube and Ts-Optics mechanics (focuser, mirror holder, spider etc). I suspect this one actually works unlike the OO built one !
The TS one has 2 positions for locating the primary mirror up the tube (AP or Visual use) rather than having an extending focuser.
I would have got one of those if I had know before.
Has anyone tried one of these ?
Ok, correction to my comment. It does focus with a 1x corrector.
The focuser tube had rotated inside the visual extension when fitting the optical train in the dark and the lock screw jammed against the focuser body when focused right in. Only just makes focus. May need a better solution for photography.
I guess Glen you were talking about the 0.7x SW corrector.
Hi, sorry for delay in replying. The focuser is quite different from the ones used on Sky-watcher in that they don't have the same amount of travel and are low level. Advantages are that the focuser does not intrude into the scope and effect the stars by covering part of the mirror. Obviously the disadvantage is that not all coma correctors will work and achieve focus easily. Speaking to OOUK they do not make a CC for their scopes as they say they are not needed. I have images without a CC and can confirm you can easily get away without one but to get the reduction qualities one would be needed. The Baader MPCC works well but again this is a x1 CC.
I made a mod to my Sky-Watcher x0.7CC by lathing off the retention ring so it can insert further into the focus tube. I have not seen or used the TS optics tube but have heard they are nice. I was not aware they used the OO UK mirrors and was always lead to believe they use GSO mirrors.
I ordered a CT16 bout 6 weeks ago. They estimated that it would be here 5 days ago but it has been delayed. Hope it is everything you say about your 10"...
The only negative I have regarding Orion optics UK is that they are not honest about delivery times. I have since bought a VX6 and this and my CT10 took a lot longer than they promised. Having said that once you get the scope they are excellent pieces of kit. My CT10 still blows me away with the details it captures and I would think the 16 will be phenomenal. Best of luck and clear skies
@@Astrobloke Yeah... the old "The checks in the mail" thing! lol Now they are saying sometime early next year... Guess I'll just 'hurry up and wait'!
@@tubedude54 its a shame as they make nice scopes. I think if they even said several weeks we would be ok I’ll wait but it’s wrong to give a date and then let you down. All I can say is it is worth the wait.
@@Astrobloke 'Next year' isn't that far off so I will see what happens.
I just wonder whether you have solved the problem I have been getting increasingly frustrated over, I knew I had seen in one of your videos that a coma corrector never fitted very well , I have an Orion VX 12, and thought for now I would get my sky watcher coma corrector I had on my pds 200 & use that to begin with & use that with my ZW0533 mm pro , but I run out of inward focus just as it’s beginning to get there tried many different things as that’s how I usually problems solved by trying hundreds of things until I luckily hit the right one 😂, I can use it without the corrector so at least I am seeing something but it has got bad stars , but I see with your baader MP3cc that sounds like you had the same problem but you can take the lip off that and push it right in the tube , if this solves my problem I will be ecstatic as I love big Newtonians & let’s just say I can run before I can walk 😂, hopefully though this sounds like it may solve my problem thanks Glen 🙏
The Skywatcher lip means you cannot insert the image train in far enough to achieve focus. The MPCC as you rightly say has a removable lip so allows this and focus achieved. It is still close to fully in but in a way thats a good thing as less leverage on the focuser to cause tilt.
I recently bought the Starizona Nexus .75 which is fantastic, bit pricey but really nice CC and focus achieved no issues.
@@Astrobloke found a second hand mpcc 3 & going to give it a try , thanks Glenn for the great videos & advice 👍
I got an email from John at Orion Optics Uk that no corrector is needed for Ct scopes
Thank you for sharing that info Robert. I will test that out later as due to be clear
I'd like to hear his logic for that statement. A Newtonian below F6 will exhibit field curvature and Coma. So a Coma corrector is needed if you want a flat field and sharp stars in the corners. Technically you don't need one but technically you do. My 2 cents
@@hypersphereengineering6015 i have had a chance to test this evening and although not bad the stars in the corners do have some coma. With the Baader MPCC the stars were sharp to the corners so I shall continue using that.
@@Astrobloke I built an 8 inch F6 Newtonian when I was younger. Hand made the Primary mirror myself. It had a Coma without a corrector. I purchased the Baader MPCC and no more coma !! What a shocker. Interestingly I have a 10 inch Ultra Grade mirror from Orion Optics (just the primary mirror and the Zygo report) I was planning on making the rest of the scope myself .
@@hypersphereengineering6015 Very nice. I really like my new scope. The details and contrast are the best I have had.
tinkerers like newtonians :)
Never a truer work said