Search found 18032 matches

by rjlittlefield
Mon Feb 01, 2021 9:57 pm
Forum: Photography Through the Microscope
Topic: Administrators Appreciation Award Winners for February 2021
Replies: 1
Views: 283

Administrators Appreciation Award Winners for February 2021

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor Hayath Mohammed for his mating gaudy grasshoppers, image #1 at https://www.photomacrography.net/forum/viewtopic.php?t=42939 . In the Photomicrography Forum, we honor...
by rjlittlefield
Mon Feb 01, 2021 9:54 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Administrators Appreciation Award Winners for February 2021
Replies: 0
Views: 417

Administrators Appreciation Award Winners for February 2021

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor Hayath Mohammed for his mating gaudy grasshoppers, image #1 at https://www.photomacrography.net/forum/viewtopic.php?t=42939 . In the Photomicrography Forum, we honor...
by rjlittlefield
Mon Feb 01, 2021 9:53 pm
Forum: Nature Photography -- Macro and Close-up
Topic: Administrators Appreciation Award Winners for February 2021
Replies: 1
Views: 227

Administrators Appreciation Award Winners for February 2021

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor Hayath Mohammed for his mating gaudy grasshoppers, image #1 at https://www.photomacrography.net/forum/viewtopic.php?t=42939 . In the Photomicrography Forum, we honor...
by rjlittlefield
Mon Feb 01, 2021 6:29 pm
Forum: Photography Through the Microscope
Topic: Embossed escutcheons on revenue stamps from the 18th and 19th Century
Replies: 30
Views: 1083

Re: Embossed escutcheons on revenue stamps from the 18th and 19th Century

For me this is both totally lovely and completely unique! I have never heard of this use of escutcheons. I find it impossible to see it as the convex object it really is. Can you? I can!! But the double-exclamation marks are because success came only after what seemed like a minute or more of strugg...
by rjlittlefield
Sun Jan 31, 2021 7:23 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Focus stacking algorithms: Zerene vs Photoshop
Replies: 9
Views: 895

Re: Focus stacking algorithms: Zerene vs Photoshop

mrred, welcome aboard! I can provide partial answers to your questions. A good introduction to the "pyramid" methods that are used by Zerene Stacker PMax and (I presume) by Helicon Focus Method C is provided by https://www.researchgate.net/publication/246727904_Pyramid_Methods_in_Image_Processing , ...
by rjlittlefield
Fri Jan 29, 2021 12:38 am
Forum: Equipment Discussions
Topic: camera for Leica MZ16 microscope
Replies: 10
Views: 574

Re: camera for Leica MZ16 microscope

I would be really surprised if that was pixel shifting. The first mode likely is, but the rest are likely automatic stitching combined with the shifting. Possible, but there's no hint of that in the literature I see. From https://downloads.leica-microsystems.com/Leica%20DMC6200/Brochures/Leica_DMC5...
by rjlittlefield
Thu Jan 28, 2021 9:06 pm
Forum: Equipment Discussions
Topic: camera for Leica MZ16 microscope
Replies: 10
Views: 574

Re: camera for Leica MZ16 microscope

Mike, welcome to the forum! To give a good answer to your question, we'll need some more information about your application and requirements. The DMC6200 is an odd beast. According to https://www.leica-microsystems.com/products/microscope-cameras/p/leica-dmc6200/specification/ , the sensor is only 2...
by rjlittlefield
Wed Jan 27, 2021 9:40 am
Forum: Equipment Discussions
Topic: New 1.4x Lens Test Results Online
Replies: 52
Views: 4122

Re: New 1.4x Lens Test Results Online

Strangely, it seems the 16-shot composite has introduced more false color, where there was less in the single image. I suspect that it has revealed more "real" color. These colors look to me like interference colors formed by small features on the subject, as opposed to false colors introduced by t...
by rjlittlefield
Mon Jan 25, 2021 2:56 pm
Forum: General Discussion Forum and Community Announcements
Topic: Trouble getting into site.
Replies: 1
Views: 263

Re: Trouble getting into site.

I'm guessing that by "search box", you must mean the place at top of your browser that used to be reserved for URL's. The problem then must be that instead of taking your type-in to be a URL and just going there, the browser, or more likely a search engine plugin, is treating it as a search string a...
by rjlittlefield
Mon Jan 25, 2021 10:50 am
Forum: Equipment Discussions
Topic: New 1.4x Lens Test Results Online
Replies: 52
Views: 4122

Re: New 1.4x Lens Test Results Online

lothman wrote:
Mon Jan 25, 2021 1:08 am
is there a possibility to upload such testpics bigger than 1024 pixel to the forum?
No, the forum upload software has a strict limit of 1024 pixels.

--Rik
by rjlittlefield
Mon Jan 25, 2021 10:43 am
Forum: Beginners Micro
Topic: First few days of micro
Replies: 11
Views: 1112

Re: First few days of micro

Thanks again. I think I have considerable experimenting to do. You're very welcome. Keep us informed, please. ...very generous with your time. I look on exchanges like this as being a win-win learning experience. One of the problems I have is that it's no longer possible for me to see focus stackin...
by rjlittlefield
Mon Jan 25, 2021 10:35 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: mountain swallowtail
Replies: 23
Views: 2625

Re: mountain swallowtail

That's a beautiful image!

Those claws look like my desktops -- not really "dirty", but cluttered with left over bits of stuff from previous activities.

--Rik
by rjlittlefield
Sun Jan 24, 2021 8:41 pm
Forum: Beginners Micro
Topic: First few days of micro
Replies: 11
Views: 1112

Re: First few days of micro

The attached are unretouched DMAP Probably you've noticed the bold "swirly" halos in the first image. Those are typical of a 3D structure that has detailed foreground obscuring detailed background, with a sharp edge or even an overhang separating the two regions in depth. Different stacking methods...
by rjlittlefield
Sun Jan 24, 2021 7:25 pm
Forum: Equipment Discussions
Topic: Advices for enlarger lens
Replies: 21
Views: 1184

Re: Advices for enlarger lens

The lens are, a componon-S 2.8/50 and a componon 28mm f/4. Not sure about El-Nikkor 50mm f:2.8. I read, also on closeuphotography.com that they will work at their best, coupled with a rear lens. The question is, which one do you advise easily to find online? I found the Makro-Symmar 5.9/120 but the...
by rjlittlefield
Sun Jan 24, 2021 3:12 pm
Forum: Equipment Discussions
Topic: New 1.4x Lens Test Results Online
Replies: 52
Views: 4122

Re: New 1.4x Lens Test Results Online

Your image is not coming up, but I tried the link and the image works with a browser app. The problem here is that the host for the image, www.lolux.de, does not work with HTTPS (secure HTTP). There is some problem with its certificate. The reason that's a problem is that some browsers, notably Chr...