Search found 2946 matches

by Chris S.
Thu May 06, 2021 2:15 am
Forum: Equipment Exchange
Topic: Free: Manfrotto 3232 tilting monopod head
Replies: 1
Views: 146

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: 1113

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: 355

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: 19
Views: 659

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: 516

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: 19
Views: 659

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: 627

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: 627

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: 627

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: 727

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: 727

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: 363

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...
by Chris S.
Wed Apr 07, 2021 10:45 pm
Forum: Equipment Discussions
Topic: A7r4 pixel shift. Rather a resolution eye-opener
Replies: 17
Views: 672

Re: A7r4 pixel shift. Rather a resolution eye-opener

Steve, Any chance we could see a comparison between an image without pixel shift, an image with 4-shot pixel shift, and an image with 16-shot pixel shift? Perhaps made with whichever objective shows the improvement most dramatically? Perhaps resized as necessary for easy comparison? I fear that's as...
by Chris S.
Thu Apr 01, 2021 11:51 pm
Forum: Photography Through the Microscope
Topic: Onion
Replies: 17
Views: 3947

Re: Onion

Brilliant thread, Saul! =D> Your onion image is enchanting, and your Sanderson prism prototypes are very intriguing. I'd never heard of Sanderson prisms, but the papers you reference suggest they may permit very low-cost DIC photomicrography--apparently a track you're pursuing elegantly. Are the app...
by Chris S.
Mon Mar 22, 2021 6:02 pm
Forum: Equipment Discussions
Topic: 20x Finite Objective Suggestions
Replies: 7
Views: 948

Re: 20x Finite Objective Suggestions

WD is 3mm or so, which is more than enough unless you need to photograph minerals inside rock cracks I would violently disagree that 3mm is "more than enough" working distance for most macro. True, an experienced photographer can make 3mm work sometimes for some subjects. But such shallow working d...