Search found 2949 matches

by Chris S.
Wed May 26, 2021 10:41 pm
Forum: Equipment Discussions
Topic: putting a tripod ball head on a 4-way macro rail
Replies: 3
Views: 230

Re: putting a tripod ball head on a 4-way macro rail

Macron, There are two screw threads used among tripods and accessories: 1/4"-20 and 3/8"-16. Reading your post, I'm not quite sure what you mean by "tripod insert screw thread," but clearly you are looking to convert one of these thread sizes to the other. You can start by looking at items such as t...
by Chris S.
Tue May 18, 2021 12:54 am
Forum: Equipment Discussions
Topic: episcopic adapter
Replies: 6
Views: 253

Re: episcopic adapter

I started on a similar project last winter, using an Edmund Optics plate beam splitter and mounting cube. Integration should be pretty easy, but I got sidetracked onto other projects and the parts still wait on my work table.

--Chris S.
by Chris S.
Tue May 18, 2021 12:07 am
Forum: Equipment Discussions
Topic: Best 40 -60 x lens (infinity corrected) on fullframe
Replies: 14
Views: 633

Re: Best 40 -60 x lens (infinity corrected) on fullframe

I found the Mitutoyo M Plan APO 50x HR, which has an aperture of 0.75 and accordingly a t stop of 33. I can imaging, that this is fine. The free working distance is low (5-6 mm) but that should be doable with my lighting setup. But I couldn't find images or a test. Kurt, I once tested a Mitutoyo M ...
by Chris S.
Thu May 06, 2021 2:15 am
Forum: Equipment Exchange
Topic: Free: Manfrotto 3232 tilting monopod head
Replies: 1
Views: 216

Free: Manfrotto 3232 tilting monopod head

Manufacturer photo: Manfrotto monopod head--downsized.jpg Can anyone use this? If so, it's yours for the cost of shipping. (Weighs 10 oz., shipped from USA ZIP code 44632. Given the $30 USD cost if new, it's probably not worth shipping outside the United States.) For field macro, I sometimes want a ...
by Chris S.
Sat May 01, 2021 2:11 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: What about a 3D printer?
Replies: 15
Views: 1256

Re: What about a 3D printer?

You fellows are a bad influence. I've been concentrating on improving skills at subtractive fabrication of metal (milling and lathe work)--and there is a lot to learn in these regimes. But one can make nice adapters with them. Now you sing the virtues of additive fabrication, specifically 3D printin...
by Chris S.
Thu Apr 29, 2021 1:30 am
Forum: Equipment Discussions
Topic: I want to use my Mitties "properly"
Replies: 12
Views: 430

Re: I want to use my Mitties "properly"

You could do what I'm doing, and integrate a second-hand Mitutoyo microscope head on a stand of your own devising. The only such head I see on American eBay, currently, is item 402642183481 for $2500 USD OBO. This one strikes me as overpriced, particularly as it lacks a focus block. But if you could...
by Chris S.
Wed Apr 28, 2021 3:01 am
Forum: Equipment Discussions
Topic: Is it some kind of microscope?
Replies: 20
Views: 942

Re: Is it some kind of microscope?

I think that photographers who use home-made microscopes are entirely correct in submitting their best images to the Nikon Small World Competition. In fact, if a current official of the Nikon Small World competition were to suddenly declare these submissions invalid, such a declaration would be agai...
by Chris S.
Fri Apr 23, 2021 2:57 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Two wrongs can make a right
Replies: 10
Views: 618

Re: Two wrongs can make a right

Does anyone know how to make a Photoshop action that takes four or five photos and averages them, and then takes the next four or five photos and averages them, etc, for all the photos in an entire folder? Lou, I don't know of such a Photoshop action, but vaguely recall, long ago, writing Photoshop...
by Chris S.
Fri Apr 23, 2021 2:04 am
Forum: Equipment Discussions
Topic: Is it some kind of microscope?
Replies: 20
Views: 942

Re: Is it some kind of microscope?

. . . I would like to know if I may take part in the Nikon competition :-) For Nikon Small World Competition people it also is: Where did you find this quote? That was a personal communication from 2016, reported by Chris S. HERE . Adi, I think you can safely consider your rig a "home-made microsco...
by Chris S.
Fri Apr 16, 2021 4:30 pm
Forum: Equipment Exchange
Topic: SOLD OUT - Mitutoyo M Plan APO 5x (unused)
Replies: 16
Views: 755

Re: SOLD OUT - Mitutoyo M Plan APO 5x (unused)

States like California has 7% import duties. . . . No. In the United States, individual states don't have import duties, due to a strong bar against this in the U.S. constitution. While very specific exceptions can exist with authorization of the U.S. Congress, for nearly all purposes relevant to i...
by Chris S.
Thu Apr 15, 2021 11:49 pm
Forum: Equipment Exchange
Topic: SOLD OUT - Mitutoyo M Plan APO 5x (unused)
Replies: 16
Views: 755

Re: Mitutoyo M Plan APO 5x (unused)

I agree with Lou. Thanks, MiB, for alerting us to your find! :D Also, rest assured that when one makes a post that is obviously intended for the benefit of other forum members, the admin team is not looking for opportunities to find fault. Brad, for buyers in the U.S., import fees on a 300 Euro, Jap...
by Chris S.
Thu Apr 15, 2021 4:09 pm
Forum: Equipment Exchange
Topic: SOLD OUT - Mitutoyo M Plan APO 5x (unused)
Replies: 16
Views: 755

Re: Mitutoyo M Plan APO 5x (unused)

I don't see any rules violations, here.

--Chris S.
by Chris S.
Tue Apr 13, 2021 1:15 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: High key contrast method (post-processing tip)
Replies: 9
Views: 821

Re: High key contrast method (post-processing tip)

Steve, I had also thought of the "L" in lab as standing for "Luminance," but my version of Photoshop calls it "Lightness." Wikipedia indicates that in Lab color, lightness is a derivative of luminance: "The lightness value, L* in CIELAB is calculated using the cube root of the relative luminance wit...
by Chris S.
Mon Apr 12, 2021 10:22 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: High key contrast method (post-processing tip)
Replies: 9
Views: 821

Re: High key contrast method (post-processing tip)

Steve, Similar but simpler? In Photoshop: 1. Convert image from RGB color to Lab color (Menu: Image>Mode>Lab color) 2. Isolate lightness channel (Channels palette: Turn off Lab, a, and b, leaving on "Lightness") 3. Adjust lightness channel (For example--Menu: Image>Shadows/Highlights>Shadows 35%, Hi...
by Chris S.
Wed Apr 07, 2021 11:12 pm
Forum: Beginners Macro
Topic: Abbreviations for equipment and technicues
Replies: 8
Views: 479

Re: Abbreviations for equipment and technicues

I've also, for some time now, found our forum's content almost impossible to find using Google. Even posts of my own, for which I know of course the author and specific word phrases used, no longer come up. They used to appear very reliably. I've found this both annoying and alarming. My own sense h...