Etendue Mejiro lenses on eBay now
Moderators: rjlittlefield, ChrisR, Chris S., Pau
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quick update:
Raf confirmed that he can make a V38 to SM2 (without flange, so that it can be fully inserted into the SM2 tubes), it will be around 30USD.
I ordered two and will report back about the fit on the Mejiro and SK lenses (can't imagine any problems since Robert mentions the other adapter fitting well).
Raf confirmed that he can make a V38 to SM2 (without flange, so that it can be fully inserted into the SM2 tubes), it will be around 30USD.
I ordered two and will report back about the fit on the Mejiro and SK lenses (can't imagine any problems since Robert mentions the other adapter fitting well).
chris
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chris_ma wrote:I've sent a mail to Raf asking if it's possible to make an adapter V38 to SM2 since that would be more useful then to M42 for me - will report back when I hear back.
chris
Good idea, I'm sure he can do it, I would buy some at the same time if he does a run. I did not ask for this the first time since I was using both M42 and SM2 but since the early days in 2017, I now use the SM2 exclusively, so the M42 setup has been sitting on the shelf since then. V38 to SM2 would be better.
Also V38 to V38 would be a good one also, for lens stacking coupling.
Best,
Robert
The seller now has an additional group of these lenses for sale:
https://www.ebay.com/itm/283898700866?ul_noapp=true
https://www.ebay.com/itm/283898700866?ul_noapp=true
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Raf just made available V38 to SM2 male adapters which should make using these (and other V38 mount lenses) as tube lenses a real pleasure with Thorlabs gear. My order is in.
Not sure if I can directly link to Raf's site, but it is called "38mm clamp to SM2".
The second batch of these lenses still has 4 available as of this writing.
Not sure if I can directly link to Raf's site, but it is called "38mm clamp to SM2".
The second batch of these lenses still has 4 available as of this writing.
good to know, haven't heard back from Raf about the prototype, will check with him tomorrow.physicsmajor wrote:Raf just made available V38 to SM2 male adapters which should make using these (and other V38 mount lenses) as tube lenses a real pleasure with Thorlabs gear.
chris
ps: hmm, the web page lists 8 in stock, maybe he has shipped mine already and forgot to tell me :)
chris
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The hood sets the element back a few mm on some lenses so really the best way would be V38 to V38 or even better mounting in the Sm2 tube at the rear so the lenses can touch or even mount one inside the shroud of another. Male to male thread mounting using two hoods adds a few mm on some lenses I think.JKT wrote:For Makro Iris lenses 37mm to 37mm reversing ring should work as well and that is coming soon.RobertOToole wrote:Also V38 to V38 would be a good one also, for lens stacking coupling.
Lens combos need to be tested for sure, some like spacing, some have to almost be touching. Tube mounting helps.
Best,
Robert
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I agree that the SM2 solution is very handy ... as long as both lenses fit inside the tube. For the Macro Irises that is likely the case. The adjustment and lens change is not as easy I would like, though.
The problem with the V38 to V38 adapter is that it is fixed length while the lenses are not. So it is better than 37mm to 37mm, but still not optimal. I'll have to see if I could design an adjustable and modular adapter for that. The modular part would mean I could change the V38 on one end to filter thread when necessary.
The problem with the V38 to V38 adapter is that it is fixed length while the lenses are not. So it is better than 37mm to 37mm, but still not optimal. I'll have to see if I could design an adjustable and modular adapter for that. The modular part would mean I could change the V38 on one end to filter thread when necessary.
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Not true, both lenses do not have to fit inside of the lens tube. I've been using the same Thorlabs SM2 tube setup now for 4+ years and it turns out that the main strength of the setup is ability to reconfigure for a new lens, or stacked lens combinations in this case. You only need threads on one side of each lens to set it up, and the rear lens or both lenses can be a larger diameter than the SM2 tube. Simple. Easy.JKT wrote:I agree that the SM2 solution is very handy ... as long as both lenses fit inside the tube. For the Macro Irises that is likely the case. The adjustment and lens change is not as easy I would like, though.
Feel free to come up with a better solution, just don't forget to share the results here. I'm always looking forward to trying new ideas and giving them a test drive
Best,
Robert