In spite of that chronology order of these lenses. There is some discrepancy by the specific specifications of this 140mm macro lens, as from "common sense". The oldest "C" version (as by specification) do have 7 lens elements - four groups. A later K/L version only have 6 lens elements - four group...

......they are giving the same 7/4 formula for the C version too... I think some mismatch by information. Another older version 140mm Macro lens - for Mamiya RB67 (1970) - they give a "6 elements in 4 groups" specification: https://lens-db.com/mamiya-macro-kl-140mm-f45-ml-a/#toc-specification https...

By chance, I read this post. (Am not a regular visitor of the forum). But got a lump in my throat with this post. Respected him very much with all the knowledge he had. He has helped many people at the forum, and by some personal conversations to, send by personal messages. Condolences and be strong...

However: I don't have any lenses with fungus for the simple reason that fungus likes to do one thing: spread. Even though all my lenses are stored at 30-40% humidity and I regularly recharge the silica gel in my backpacks I still wouldn't want to have a mouldy lens packed full of spores anywhere ne...

0.04mm = 4/100mm
0.01mm = 1/100mm = 4 times as precise as the first line, so this one is more accurate

Sorry, as a note first: As there was not a new message “yet” more early, changed some lines within my previous message. But accidentally about the same time your message was send including the "previous" complete message quote, with some tiny differences now. For not messing up again, I keep it in t...

Interesting information about what you describe. It may be confusing that I did a “quick & dirty” test, and used some coins as objects to be photographed. (Maybe subconscious inspired by examples here on the forum? 8) ) Indeed, by that it comes down, “how” the coins are illuminated by the light shin...

“Drum scanner”. A method scanning for lithography purposes with a huge investment in those days ($100K-200K) By today innovations, we can have advantage of all kinds of new techniques. Learned much over the years, using “old” and “new” technologies combining in general. Keep it simple, go to the bas...

Maybe enough for the MP-E 65mm but not for other more demanding scenarios? I don't think you will be happy with this or either the Castel L with the MP-E. I you have a look in Rik's table for DOF you see a a value of 0.025mm for 5x magnification @f2.8. The rack and pinion drive of the Novoflex Cast...

Still looking into the possibilities that may apply for my situation. ....As for using possibilities mentioned option for stitching several images. Within that < previously written message: > As for the last option (8x10 inch sheet film) TWO options to figure out for stitching possibilities. Shiftin...

I thought you were interested in the Sigma 105 not about pixelshift Both. When using the "second" method of pixelshift written in a previous message: http://www.photomacrography.net/forum/viewtopic.php?p=294923#p294923 See the option as described more to the bottom of the message: OR... A fixed cam...

here you can have a look on the test of my Sigma 105. A comparison of a 16x pixelshift reveals that at f2.8 the Sigma outresolves the sensor of a Sony A7R4/5 since the pixelshift shows much more details as a single frame :D http://www.photomacrography.net/forum/viewtopic.php?p=288434#p288434 Of-cou...

Hello Robert, Wauw, you wrote very comprehensive and detailed answers. I do appreciate very much. Thank you. The [ Sigma ] 70 Art was also very good but the 105 Art was superb. For the prices its hard to beat the two Art lenses. For general photography e.g. I am also using two Sigma lenses. However ...

One quick observation I can add is that newer lenses are being optimized at wider and wider apertures, in my test here: https://www.closeuphotography.com/1x-macro-lens-test-2022 The Laowa 100mm and Sigma 105mm Art were both best, center and corners, at f/4, so one stop closed down. That in itself i...

As for Cambo solutions: E.g. Cambo Actus. Cambo Actus do have several options, that also other vendors have within their product assortment. So check several options and prices first. The more short base plate, in this video example, IMO is not long enough for macro usage. Cambo Actus B to Actus G h...