WTB in USA M26-36tpi to 52mm

Dik · Post by **Dik** » Mon May 04, 2020 6:16 pm

I need a Mity to filter thread adapter. Prefer 52mm filter thread, but will take any I can find. Need quick shipping.

Adalbert · Post by **Adalbert** » Mon May 04, 2020 11:59 pm

52mm->37mm & 37mm->30mm & 30mm->26mm

e.g.

https://www.ebay.com/itm/RISE-UK-52-37M ... SwyQtV5o5x

https://www.ebay.com/itm/RISE-UK-37-30M ... Swu4BV5q1S

https://www.ebay.com/itm/RISE-UK-30mm-2 ... Sw9Rda-pdJ

Dik · Post by **Dik** » Tue May 05, 2020 8:56 am

Adalbert wrote:52mm->37mm & 37mm->26mm

e.g.

https://www.ebay.com/itm/RISE-UK-52-37M ... SwyQtV5o5x

https://www.ebay.com/itm/RISE-UK-30mm-2 ... Sw9Rda-pdJ

Thanks, but! They ship from China. I have one stuck in transit from China so I'm looking for something already here in the USA.

Adalbert · Post by **Adalbert** » Tue May 05, 2020 9:03 am

Sorry, but I only know and use these cheap rings :-)

Dik · Post by **Dik** » Tue May 05, 2020 9:06 am

Adalbert wrote:Sorry, but I only know and use these cheap rings :-)

I'm hoping someone has something used that they'd part with.

Sym P. le · Post by **Sym P. le** » Tue May 05, 2020 7:34 pm

Have you considered Thorlabs - Mity to SM2 and SM2 to 52? I use this for RMS and Nikon, the Mity piece isn't listed but they advertise custom solutions. I'm glad I took the plunge. Chinese stuff that I tried was loose.

Chris S. · Post by **Chris S.** » Wed May 06, 2020 12:25 am

Dik,

Building on Sym P. le’s good thinking, but with different parts that should eliminate the need for custom work, how about the following arrangement from parts listed at Thorlabs Optical Component thread adapters:

1. M26 x 0.706 (Mitutoyo) internal thread to SM1 external thread: Part number SM1 A27, $21.31 USD
2. SM1 internal tread to SM2 external thread: Part number SM2A6, $26.51 USD
3. [SM2 internal thread to M52 x 0.75 external thread: Part number SM2A53, $21.54 USD

Granted, this adds up to 0ver $70 USD in parts, plus shipping. But Thorlabs is an excellent company to deal with, will send you wonderfully-made components, and will ship quickly. And of course, they add a box of lab snacks for you to eat. Thorlabs is also good about returns, and their customer engineers are very good to work with.

--Chris S.

Chris S. · Post by **Chris S.** » Wed May 06, 2020 12:46 am

Dik,

In case you're not already aware of RAFCamera in Belorus, it should likely be pointed out. Raf seems to be a one-man shop. From experience, we know that he makes good things, and he seems to ship more quickly than most cheap items from China.

RAFCamera's "M26 (Mitutoyo, Nikon BD) female to M52x0.75 male thread adapter", $25 USD, would likely serve you well.

--Chris S.

Sym P. le · Post by **Sym P. le** » Wed May 06, 2020 1:06 am

I've dealt with RAF as well and can vouch for the prompt service and quality parts. For a single item, that would seem to be the most efficient route.

Macro_Cosmos · Post by **Macro_Cosmos** » Wed May 06, 2020 3:20 am

Just get them from thorlabs, you only need 2 components (I recommend 3).

SM1A6: https://www.thorlabs.com/newgrouppage9. ... SM1A6#3229
SM2A52: https://www.thorlabs.com/newgrouppage9. ... 2A52#11076

Optional, SM1A27: https://www.thorlabs.com/thorproduct.cf ... ber=SM1A27

Thorlabs' SM1 system uses M26.289x0.635. It's ever so larger than M26 and has ever so finer threads, making it directly compatible Mitutoyo's M26x0.706 threads. You have to screw the lens all the way in or else there will be some wobble. It won't damage the threads. SM1A27 converts SM1 to M26x0.706, giving it a tighter fit.

You can get away with just the SM1A6, you're able to screw the adaptor into the M52x0.75 threads but it won't go all the way in. SM2 is both larger and finer than conventional M52 threads. You do risk damaging threads and your optical axis will be misaligned.

Macro_Cosmos · Post by **Macro_Cosmos** » Wed May 06, 2020 3:25 am

For Chinese adaptors, I can only recommend a brand called Amoyca, they make specialised microscope stuff. The Mit adaptors actually come with the correct threads instead of 0.75, it's a lot more expensive. Honestly though, $12 VS $2 (Chinese market pricing), anyone with a mit doesn't need 10 bucks and a potential disaster.

Adalbert · Post by **Adalbert** » Wed May 06, 2020 4:19 am

Hello Macro_Cosmos,
I have been using the cheap Chinese rings for years without any problem.
And I have some rings from Rafcamera too (but their quality is not better).
BR, ADi

Dik · Post by **Dik** » Wed May 06, 2020 5:49 am

Macro_Cosmos wrote:For Chinese adaptors, I can only recommend a brand called Amoyca, they make specialised microscope stuff. The Mit adaptors actually come with the correct threads instead of 0.75, it's a lot more expensive. Honestly though, $12 VS $2 (Chinese market pricing), anyone with a mit doesn't need 10 bucks and a potential disaster.

Thanks, ordered one, hope it doesn't get stuck in transit.

mawyatt · Post by **mawyatt** » Wed May 06, 2020 7:10 am

I can 2nd Chris and Macro_Cosmos. I've had so many problems with cheap eBay rings and adapters from China, they are either labeled wrong & don't fit, bind, or are so loose not useful (lost is shipment (claimed?), long delivery, etc). Unless you know the vendor, it's "rolling the dice" for any cheap adapters and rings from eBay IMO.

The Thorlabs is a wonderful resource and top quality, and they have engineers that will help with your requirements as mentioned. I've built my precision V and H setup based upon Thorlabs components, absolutely top quality lab grade components.

RAF is a good resource for custom adapters, very high quality. I have a custom adapter from RAF for a repurposed scanner lens, nicely machined and fits!

A valuable resource I've found for lens tubes, adapters, and such but better known for their focus rail is Wemacro. The adapters they offer are very good and have proper fit. They have a M26 (Mitutoyo) to M42 adapter that I use, and their Nikon F mount to M42 is very good, also an excellent tube lens set for the objectives. William at Wemacro evidently keeps a close watch on the quality of their products and this shows.

Best,

Macro_Cosmos · Post by **Macro_Cosmos** » Wed May 06, 2020 8:52 pm

I have heaps of Chinese adaptors. I also have a contact who runs a factory that I can trust, however most don't have such a privilege.

I've had so many problems camera adaptors (the F-mount) until I bit the bullet for the expensive thorlabs stuff, now everything I have is built around it. If I need a specific adaptor that Thorlabs doesn't offer, I can just get my contact to make an adaptor for me, it's not too expensive.

For Raf, I don't really know what to say. On one hand, their SM2-M52 adaptors are more expensive than Thorlabs' which is mind-boggling, on the other hand, they offer a lot niche adaptors. The quality is pretty good, sometimes the pricing is weird. I personally won't say it's better or worse than "working" Chinese adaptors. Put mislabelling and frustrating shipping drama aside, it's really just a metal piece and it shouldn't go wrong. Vendors are the ones people should be aware of.

I do agree with Mawyatt here, Wemacro's stuff is really good. Their M42 tubing is custom made and works very nicely. It even comes with installed flocking. Thorlabs' SM2 stuff is expensive yet they don't have anti-reflectance internal coatings, bummer. I suppose they can't do it since the tube is designed to hold optics and retaining rings, such that the coating will be damaged if one put retainers in; however their non-internally-threaded tubes don't have an anti-reflectance finish either. It's not a big deal, but for the pricetag, I do expect a lot more. I still recommend it.

WTB in USA M26-36tpi to 52mm

WTB in USA M26-36tpi to 52mm

Need USA source