Eyepiece Review (PART 2): How I Fixed The SVBony Red eyepieces!
Вставка
- Опубліковано 10 гру 2022
- In this last part of the SVBony gold/red eyepiece review, I tackle the thorny issue of the Red eyepieces popping out of the Barlow lens. I investigate the problem and then try three ways to fix it!
#svbony #eyepiece #review
/// AMAZON AFFILIATE LINKS (Note: I earn a small commission from these links) ///
SVBony Gold 66 degree FOV eyepiece set: amzn.to/3Y7MYmn
SVBony Red 68 degree FOV eyepiece set: amzn.to/3FePX3J
Best Smartphone Adapter EVER (as of 2023): amzn.to/3MYYnBF
Best Value Set Of Upgraded Eyepieces: amzn.to/3Y7MYmn
Best Overall Red Dot Finder: amzn.to/3UQVPJr
Economy Smartphone adapter: amzn.to/3WfKS2e
Bluetooth shutter button: amzn.to/3OBpW1i (prices have risen)
Best book for new astronomers: "Turn Left At Orion": amzn.to/3PDxLo4
CHEAP 8 inch Dobsonian Telescope: amzn.to/49TH12l
NICE 8 inch Dobsonian Telescope: amzn.to/4bbxIuU
RED HOPE Adventure Scifi Novel Series:
Kindle Edition: amzn.to/49O9bud
Paperback: amzn.to/4aPRc7Y
Audiobook: amzn.to/3WhhXOw
UA-cam Notes:
1) This video complies with the UA-cam Community Guidelines and Terms of Service.
2) I purchased all products shown in the video with my own money. This was not a paid promotion.
3) Soundtracks were used with permission from my video editing software suite, Camtasia.
///Thingiverse 3D Part File For The Washers (Print in high-resolution):
www.thingiverse.com/thing:570...
///*** STEP BY STEP VIDEO FOR ATTACHING PHONE TO TELESCOPE ***
• Connect Your Phone To ...
Summary: I compare two popular eyepiece sets from SVBony that are a good first step into wider fields of view. These are good for #astrophotography. In this video, I use a 3D printer to fix the Red version of the eyepieces. - Розваги
I don't know if you heard me, but I was yelling "O-Ring" at my phone while watching this video, lol.
That might work too. A very thin washer worked great.
Yeah o ring would work I was the same haha
I would suggest that an application for having a secured eyepiece that can also rotate without falling off is for the use of a linear polarizing filter in the lens barrel.
Thanks for both vids on these. I wouldn't put spacers in - in the two with lens elements in the barrel, you're changing the optical system, and what you're doing is just moving a very small part of the non-cut part over where the compression ring is (for a lot of work). This same problem exists for other compression ring and undercut combinations - I get the same thing with Svbony's coaxial locking focuser adapter and my Orion Sirius Plossl. If the compression ring is over the undercut, this happens. I can't figure out why the undercuts are still manufactured.
Anyway, there are two other easy solutions to this problem - you can cut your HDPE milk bottle into a strip which fits neatly inside the undercut, or you can simply take the brass compression ring out of your receptacle. If you want the compression ring, and the compression ring isn't holding the eyepiece because the screw is too short, maybe you just need a longer screw. If the screw is long enough, and the brass ring is too long, you can cut a few mm off the brass ring.
As for my coaxial locking adapter, I'll need to use the HDPE strip. I'm planning on curling it so it holds onto the eyepiece barrel.
your channel is a luxury. Full of creativity, new ideas, cheap fixes. Very nice, Thx
Very kind words, thank you! I've got lots more planned.
Your analysis of lenses and telescopes is excellent….a new subscriber.
Thank you for the kind words. I've got plenty more planned. Clear skies!
What a great video. I have a 20mm Red and it's slightly loose in my diagonal. I don't have a 3D printer so I tried option #4, a tiny rubber band, and it worked. Thanks!
Very clever solution! Some other folks have layered aluminum tape in the barrel recess with good results. Clear skies!
Great video 👍 thanks for the info
Glad it was helpful. Clear skies!
Thank you for the files they work fine for me to. Keep up the good work! Just have one tip if you don't mine you should state that it must be printed in a high resolution in the description of the 3D file it's helpful. I had to print it 2x. I also used TPU you didn't state PLA or something else to.
Thank you for that tip! UA-cam won't let me update video, but it will let me update the description.
Thanks a lot for this video. I just ordered a set of these, so I'm going 3d printing at the library :)
Congrats. I think you're going to really like them. Clear skies!
Thanks a lot and great info. I'm getting the svbony kit and printing the washers, thanks.
Glad I could help. Be sure to try them out to see if you need the washers. Some viewers have, but some haven't. Clear skies!
I love your sense of humor on the attempts that didn't work. Thanks!! Hobbies should be fun, and you're having fun. ...one question: since there's a lens in the base section of the eyepieces and you're adding distance to main body glass (via washer thickness), have you noticed any difference in eyepiece performance? Yes, it's a very thin washer, but it's still changing distance between lenses. ANYWAY, fun video. Thanks!
Good question. The answer is that I haven't been able to tell a difference. However, I'm not the most discerning of viewers, so a professional might notice. Clear skies!
I know I’m late to the game, but we wrapped electrical tape to the outside to snug up the fit. And replace the tape once or twice a year
Thanks for the comment - that's a very cost effective fix!
That’s awesome, i know a lot of people don’t have 3D printers, you could actually sell them as most of the places sell everything so expensive, i misplaced the 3 locking screws for my primary mirror and try to order online and were $29.99 plus tax and delivery, luckily i was able to go to home depot and get them for like $2.50
That might be a good idea. They are so simple though, I couldn't charge more than a few dollars probably. I understand the markups that you speak of. During my Meade telescope rebuild video, I bought some thumb screws that were several dollars each despite being simple galvanized 5mm threads. However, I bought them from the local Ace Hardware, so there was the convenience factor.
My first instinct with a problem like this is to wrap some electrical tape around the eyepiece to act as a spacer.
Agreed. There are a few ways to resolve this situation. I was trying to keep it minimally invasive with the tiny washers. Clear skies!
i have no idea about these 3d printer one day ill look into one.
They can be very helpful.
I recommend using an O-Ring! Or just a gasket! 😉
Good idea. There are many ways to address this issue. Thank you for watching.
Very imaginative. Well done. What about a rubber band? Did you try it?
Good suggestion. I have not. Had the 3D printed washers failed, I would've either tried the rubber band or a few wraps of foil tape. Clear skies!
Nice problem solving brother. Any better eyepieces for the money?
For the price/value, the SVBony gold-line series (shown in the video) is absolutely the best, especially for the "wider" 66 degree views. After that, the next step up is to the Explore Scientific 82 degree which is where I stopped - they are the best in my mind. I won't be investing in Tele Vue's because I really like the Explore Scientifics so much. Have fun!
Sorry. I was typing this while watching the video. As a former Air Force mechanic, I watched you wrap the teflon counter clockwise and shook my head. Then I watched you try out the 3D printed washers/spacers and knew you were on to the solution. How would the SVBony 20mm compare to Astro Tech 20 mm? I know the Astro tech is 100 degrees but putting that aside, how would it compare. I've been waiting for the Astro Tech to be shipped to vendors for what feels like forever! :)
Haha, yes I always get the Teflon direction wrong (in the video at around 6:12, I note that yes, I got it wrong yet again, lol). I just bought the AstroTech 4mm with 82 degree field-of-view and plan on doing a review video soon as we get some good viewing weather. Clear skies!
@@reflactor Looking forward to your review of this ep. Recently purchased one myself and am waiting for all these DFW area clouds to leave so I can get a good first light with it. :)
I can't help wondering if the change in distance between the lenses in the eyepieces that have a lense in the barrel affected the image focus. Have you actually tried them out to see if they are still in focus?
That's a good question. I honestly can't say what the relative impact was, but I'm sure it was minuscule. They still focused great and were very sharp. And the rings are easily removable if desired.
Hi ! Did the 3d printed washers affect the distance between the lenses as some are in the barrel ? thank you.
Excellent question. My guess is probably, but only slightly. The focal distance may have been changed by about 0.1mm? The good news is that it's completely reversible if you remove the washer.
@@reflactor Thank you ! I am in a process of looking to buy a used telescope and for the future some new eyepieces and I got a little afraid when i saw the price for good quality ones until i saw your videos and small optics ones. I'm hooked on your videos :)
What if you replace the bases of the red lines with the gold lines? You would get the perfect eyepiece!
BTW, the glass you find in the bases of the shorter focal length eyepieces are just Barlows so it should work exactly the same.
Well, that is one way to approach it. But then the other eyepiece set would have the base problem. :) Clear skies!
John have you tried lifting the eyepiece ever so slightly out of the barlow then tightening it?
Good question. I did try that and it didn't help. The problem with these is the opposite - the barrels need to go down (away from the main body).
@@reflactor Ok I guess that makes sense.
Can you send feedback to SVBony about the issue you found? Great solution!
I sent it to them via Twitter, but I think they may not be monitoring it. I'll go through their support channel.
What filament did you use to print the washers?
I use 1.75mm PLA for my 3D printing. I once tried ABS (out in the garage) and the smell was just too awful.
Thank you. I was hoping it was PLA.
Ok, i know I'm a little late to the party, but I'm just getting back into astronomy, and just learned of the svbony brand. What i want to know is why not just buy the svbony barlow(s)?
Good question. The SVBony brand has come a long way - they make really nice gear that is actually affordable. You could easily buy an SVBony Barlow lens, but if you have the whole set of eyepieces, there's really no need to do that. My videos try to address if you already have an existing Barlow with a barrel strap tightening device. Other Barlows seem to be fine with it.
@@reflactor I understand, and I'm not disagreeing with you. I've been looking at the celestron ex-cel series, and will probably buy some of them in the near future. But, I just bought the svbony 6mm and 20mm red band based on your and other reviews. I also purchased a 2x and 3x Barlow. At the price point, I figured why not. I can't find many reviews about them, and was just wondering if you had an opinion. Thanks.
Edit: I do have a couple of cheap "stock" Barlows that would probably work just fine. I don't have the svbonys yet, but I should have the 6mm in just a couple of days. The others will be a few weeks.
I think you're really going to like the SVBony eyepieces.
I am assuming that the problem comes from the ring tightening just falling into the groove and not being able to tighten enough to hold it completely. Could you not just wrap a layer or two of tape around in the groove to increase the diameter? It would also be very easy if you for some reason needed to reverse it, that ring might be difficult to dig out of the corner.
That is probably the cause. Wrapping tape is one solution, for sure. Admittedly, I like to use my 3D printer when I can. Getting those rings out would be pretty easy - not a problem.
You know, you could just wrap the notch in the barrel with aluminum foil tape. This can build up the thickness in that area and will give the ring something to hold on to.
That's a very clever solution. I think in this video I was more concerned about investigating the cause of why these didn't work in my Barlow. However, the layered foil tape is definitely a way to solve it.
Sounds like o-rings would've been a great solution too.
Very possible, but they'd have to be super thin.
@@reflactor They come in a surprising variety of sizes. :)
@@reflactorthey are compressible though.
Can you not just flip the collar around and screw it in backwards?
I'm afraid I don't know what you mean unfortunately.
@@reflactor you can unscrew the silver 1.25" collar/sleeve from the lens, and in most of those the threads go all the way down, can you not screw the collar sleeve upside down, such that the indented portion is closer to the bottom than the top of the collar?
Based on your response, I assume the thread is different on the svbony between the top and bottom, I've flipped the sleeve upside down on a couple different brands, but never tried svbony.
@@ixamraxilemme try rn brb
Its china cheap standards cheap, and that stupid glove, have the same eyepieces i use the gold tape use to solder electronic boards, very strong heat prove tape, and no more WOBBLES, and its snowing in Rhode island. and you need an compass cutter, cuts perfect circles used to make Teflon washers for the tripod super tune.
Thanks you for watching. Clever use of that gold tape. I'd never heard of a compass cutter so I learnedbsonething new today. Clear skies!
@@reflactor Well ive learned a lot from you 2, clear skies, keep them videos coming.