Modified Achromat MOD! (Improve Contrast)
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- Опубліковано 21 сер 2024
- The Super 25 modified achromat eyepiece which is supplied with most SkyWatcher telescopes is a good cheap eyepiece, but because they are made of plastic they suffer from bad contrast due to shiny surfaces on the inside. In this video I will show you how to sort this minor problem out.
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Works on the Small Finder scopes.
I also flocked the inside of the tubes of
my Astro Tech 10x50mm finder tubes.
Huge improvement.
Excellent! Thank you Jason! Seems so friggin' easy! Why don't they just do it before selling us the eyepieces and scopes? Lousy user experience is the MAIN reason people give up on astronomy and never find out how beautiful the night sky can be… Thank you again.
Thanks so much Jason! I purchased a Skywatcher 10" dob some months ago, and they of course came with the eyepieces you mentioned. However, when I disassembled them, it looks like they have somehow matted the interior surfaces of the barrel and spacer already. It's not nearly as shiny as the outside, so maybe they've been listening to you! Sanded it anyway just to be sure. The glue stick idea is genius! Need something a little narrower for the 10mm, however. All worked like a charm. Can't wait to see the difference as soon as these pesky clouds go away.
Man .. i just love your videos
U tell things wayy easy than others...
Nice ..
Great vids, this is really useful stuff for beginners and peeps on a budget. Keep 'em coming!
Fabulous Jason! Very well explained, thorough, and I love the glue stick trick :) From this day forth I'll always remember that my MA lenses go belly to belly :D Cheers
Hey Chris, Thanks buddy. Lol better than nipple to nipple I suppose XD
@@smalloptics753 lol
9:42 Hi Jason, I've recently bought a second hand Celestron nexstar 130slt. Unfortunately I've not had any clear night's yet to use it so I'm the meantime I'm gearing up on enough information to make things easier when I do. I find your no nonsense, jargon free videos so helpful so thanks! I look forward to watching and learning more.
Interesting mod, I tried it myself on a Celestron 25mm eyepiece and it does improve the viewing quality. Only a little bit though, it'll make a $10 eyepiece feel more like a $13 eyepiece. The colors and contrast are a bit more natural and in an A-B test you'd most likely pick the modded one. That said, a new eyepiece (even to an affordable one) is still going to yield a bigger improvement. This is more of a mini project that you do if you feel bored.
Excellent! Cool mod! Thank you very much!
1 Use clean towel or paper towel.
1. Disassemble (CCW) inner barrel Lens eye lens down on pt
2. Sitting on a plastic cap and tapping the outer barrel to drop out internal assembly.
3. Sand all inner plastic barrels to a dull finish
4. Black Sharpe the lens edges and corners of edge (2-3 coats)
5. Install rounded side of lens in toward each other on both lens
6. Blow dust assembly and check for any debris before assembly
Clean lens parts IPA +soapy deionize distilled water + rinse with DDW then air dry.
New Sub here.
Many Thanks! I've got a Celestron C90MAK coming tomorrow. Between flocking the inside tube and modifying the eyepieces I feel like you've set me up to get a better experience from just a couple of video how-to's.
Cheers! 🖖
Nice Overview of Eyepiece👍🔭. I think Those Cheap Plossol Eyepiece similar To The Design Of Kellner Achromatic Doublet.. Keep Going my Friend Clear Skies👍🔭
Hello Deep Sky, Thank you buddy, yes, Kellner are a similar design to the Modified Acromat. Take care friend, clear skies.
Eyepiece Kellner in this video is good eyepiece, changed in 2000 year to MA also good eyepiece (reversed Kellner). Some long focus telescope users prefer MA, Ortho, and Huygens than other designs.
Excellent video. Please keep on posting such tips. Thank you very much.
I like these tinkering videos. Well done !
This is a very clever and great trick. Thank you for this beautiful advice...
Great job mate. More movies and more often. Your ideas inspire me. You need to create a group on FB so that we can exchange ideas and experiences. Stay safe
Hello Mariusz, Thank you my friend. Great to hear you are getting some inspiration from my videos, I have thought of doing a FB group but it will probably be a bit later in the year. Take care buddy, all the best for 2021.
If you ever need to use matt black paint Humbrol is the best in either spray or brush form. It dries flat matt unlike others
Excellent advice and instruction. Thanks Jason.
Your more than welcome :)
Hey bud how you been ? Hope you had a good Xmas . I done all of this to my primary and secondary on my OTA massive massive difference I’m sure you have probably done this too but if not your going to be amazed by the difference in contrast 😉 great vid bud very clear steps for others to follow to others who own a frac rather than a newt you can do this to your main objective ... again night and day difference also to note when you tighten it up as said here it is VITAL to not over tighten I also dull the threads on mine too 😀 stay safe bud and keep these vids coming 👍👍
Hello Moon Monkey, Yes thanks buddy had a great xmas hope you did too. Yes I have done it on everything that needs doing it;s a great mod for lenses that are not already blackend. Take care buddy all the best for 2021.
Great vid!
Good video, I liked a lot the purpose of your channel, immediately subscribed when I saw your posts. Just a question: this sandpaper needs to scratch the plastic until it is no longer shiny, but how much abrasive must it be?
Also, these markers easily dissolve with isopropyl alcohol, and this is what I use for cleaning the eyepieces. How can I clean them from fingerprints after painting?
Last one: about eyepieces, is it better to use the original ones modified (mine is equal to yours), or buy another one? If the last option, have you ever had contact with Celestron Omni, what do you think about them?
Hello Vitor, thank you my friend. The sandpaper abrasive needs to be medium to medium/fine just enough to take the shine off. When it comes to handling the lenses I would advise using cotton or latex gloves to keep finger marks off them . As for buying a new eyepiece that's entirely up to you, the hack is easy to do so personally I would do it to the eyepiece you already have....it's cheaper that way :) The Omni eyepieces are a great budget range, I've not tried them all but I have the 12mm and it's performs well . The Omni Barlow is probably the best you can buy for the money. Hope this helps, take care, clear skies :)
@@smalloptics753 I think the super 25 is really good, both in amplification (28x in my small 70mm refractor) and fov. Unfortunately, there is no Omni near 25mm, only 32 or 15. What do you recommend?
The only think I really worry about this improving is the marker dissolving in the alcohol. Because it is very likely I will get some fingerprint on it, but I would't be able to clean it... What could be done?
Nice.
👍
What a simple and effective way to take out the eyepieces ❤️
If it was me I would have lens elements all over the floor 😂
Gotta try this for sure 😁
Thanks sir 😌
Hello Mubarak, hope your well friend, Yes it's the best way to remove the lens elements especially when you are not sure how they are constructed.
BTW, I have had to delete a lot of apps including whatsapp due to storage issuse on my phone , as you know it's my only recording device I've got at the moment (I really must upgrade) so I apologise if you have tride getting in touch as I don't want you to think i'm being rude. Take care buddy, clear skies.
@@smalloptics753 haha okay sir ❤️
Hope you can upgrade soon😀
No problem sir ,we can always keep in touch via mail 😎👍
@@mubarakhayath Indeed we can 😀
Good to know if you ever need to clean inside an eyepiece.
Thank you, Jason!
Excellent video, I just want to know which eyepieces have blackened edges & which don't.
I have about 8-9 eyepieces, mostly cheaper Plossl versions.
I'd like to know so I can tell which ones to mod.
I guess I'll have to disassemble them 1 at a time to find out & fix each.
I'm about to mod my focuser knobs w/ wooden rings to enlarge them.
Have a GREAT day, Neighbor!
Hello Jon. Thank you my friend. Most plossl's already have blackened edges you can sometimes see if they are black just by looking at them in the daytime without dismantling them, if the edges appear white that means they haven't been treated, if you can't see the edges then that usually means they are already blackened. This method isn't totally foolproof but may save you unnecessarily dismantling them. If you look at my latest video about the svbony telescope when I start talking about kellner eyepieces I show a photograph and you can see the white edges of the lenses in that photo meaning it hasn't been treated. Hope this helps 🙂
A modified, modified achromat!
LOL.. Indeed :D
hello jason! sorry for commenting so late but i would like to know if fabric sharpie markers are okay to use when modding
This was very useful. Thanks thala.
Your welcome friend :)
Always wanted to see a globular cluster
A great one to find is the Hercules globular cluster...It' quite easy to find....At this time of year Hercules is in the East, It's quite low at the minuet (but not to low to observe) but it will get higher as the year goes on. You can find the cluster in between the two right hand stars that form a square that are suppose to represent Hercules's body...A small telescope or binoculars will show it well. :)
@@smalloptics753 oh yeah I know where Hercules is cool thanks!
They used to do this with CD`s but also cut the edge at an angle. I saw it on UTube lol.
don't go flipping those lenses so that when you put it back together, they will be facing the correct direction and you can see clearly through them!.
I threw away my 10mm eyepiece and barlow that came with my skywatcher Dob but I still use the 25mm years later even though I have better stuff now.
I wanted to ask you if you would review an astronomy aap named SyEye . Because it can also be used kind of like a motored telescope
Hi Guptazzzz, I will have a look, I have tried a few apps for that very purpose and what I have found is telescopes tend to give off a slight magnetic field wich interferes with the gyro in the phone and therefore you get inaccurate readings. I don't know if all telescopes do this but all the ones i've tried have. You can test if your telescope is giving off a magnetic field by downloading a free App called EMF detector (There is a lot with that name any one will do) then go round your telescope and see if you are getting any high readings. Unfortunately there is nothing you can do if there is.
Actually i will have no problem because my telescope's body is not made up of metal it is made up of some kind of plastic i suppose
And there is is a astronomy online lectures for 10 days that i am gonna join
emery cloth!. that what that is.
did he just scratch that lens?
That is a Kellner eyepiece.
Kellners are similar but I can assure you it is a Modified achromat :)
@@smalloptics753 Sure thing. I will have to learn up on that design.
Hello, Nice to have found you channel. Good video, well explained! I see we have some common friends, like Chris from Diy Astro. My name is Ioan (John), I have also a channel Galaxy Art Media with astrophotography videos reviews tutorials and vlogs, and soon will add some space painting videos. Check it out when you have time, maybe we can collaborate in the future.