Lex, Very nice contribution to the community! :D We have a FAQ: 3D models started and mostly used by Saul, but available to anyone: We can use this thread as a list of resources, and links out to discussions in the main forum. In this FAQ, Saul has been storing the files at the site www.thingiverse....

Of course this doesn't seem very practical. Can't argue with that. :) Oddly, it seems eminently practical to me. Another solution would be to replace the lens tube (in an infinite system) with a cage system (such as available from Edmund Optics and Thorlabs) with a hole on top. Then just drop the l...

Here's the simplest design I could think of. The laser diode is forced into a tight fitting hole. Perhaps this is not up to long time usage and in that case I'll have to find a piece of aluminium tube that can be glued into the base. Iconoclastica, Thanks much for posting your solution (pictured in...

How could this be made to work with mirrorless? I've given this considerable thought. My sense is that the laser should be placed in the infinity space between camera and tube lens. An implementation that appeals to me is a 45 degree mirror on a flip-out arm (flip out for laser aiming/focus, flip i...

ROR is a commercial product for cleaning lenses and other things. ROR is an acronym for "Residual Oil Remover." Rounding off the numbers in the MSDS , ROR consists of: Distilled Water 85% Liquid Soap 9% Isopropyl Alcohol 4% Sodium Chloride 1% Ammonia 1% The official ROR website hails the product wit...

Btw, can I use my normal camera lens cleaning fluid and lens tissue (PecPad) on an objective? Good enough for my 600mm, but maybe that's not relevant either. ;-) I don't know what's in your normal lens cleaning fluid. I use ethyl or isopropyl alcohol for cleaning lenses, or if a lens is very grungy...

Thanks, Chris. (I've also got the 20x ;-)) Dennis, I didn't mention your 20x, because a 20/0.42 equates to f/24--revealing of dust, but not so ruthlessly as your 50x(f/45) or 100x (f/71). It's those tiny effective apertures that make dust appear in focus on your sensor. In modern, regular photograp...

https://zookeys.pensoft.net/article/24584/ That article is well-worth a look--particularly the supplemental document that goes into wonderful detail on the how and why of each element in the design and processing. I thought of the QV or the Nikon Measuring, you can think of other telezentic lenses ...

My guess is that it's sensor dust. You didn't mention which objective you're seeing this with, but I know that you have objectives that are effectively f/71 (Mitutoyo 100/0.70) and f/45 (Mitutoyo 50/0.55). These are ruthlessly revealing of sensor dust. I clean camera sensors under a stereo microscop...

Pau, what an elegant implementation! :D Thanks for posting it. Looks like a great approach for Canon bodies with similar eyepieces. I'd not heard of "12mm diameter plastic tube wall fixation." Am glad to be aware of it now. At present, I'm working on a version for another forum member. When finished...

(FYI, the "-2" I'm referring to is indicated on the objective canister, you can see it suffixed to the model number, -2 is the second version. Newest versions have the -3 tag". While the canister clearly does say "-2", it also appears to say "5x" (though it's fuzzy in the image). If so, this is not...

Many forum members are starting to get standardized wafers as resolution targets, and this will give us the ability to test and compare our objectives against a common standard. Lou, I'm less than optimistic about the usefulness of distributed testing on standardized wafers, for a bunch of reasons ...

First the good news: I've tested more Mitutoyo objectives than I can count, and inspected all of them visually as a first step. I see nothing unusual or disturbing shown in any of the images you've posted. Now the bad news: The visual appearance of a Mitutoyo objective tells you very little. I did o...

Nice demo!

I had to look up jaggery, as I'd never heard of it. Sounds tasty.

--Chris S.

Lou, Agreed that if this lens has been disassembled, it's junk. However, from the images Greg linked to, I'm not sure that anyone has disassembled this lens. Looking into an objective can fool the eye (or at least my eyes)--things are not always in the location they appear to be. I wouldn't condemn ...