Search found 18193 matches

by rjlittlefield
Fri May 14, 2021 8:31 am
Forum: General Discussion Forum and Community Announcements
Topic: Strange ZereneStacker behavior darktable-cli output
Replies: 2
Views: 43

Re: Strange ZereneStacker behavior darktable-cli output

I am reminded of the old joke, that TIFF actually stands for "Thousands of Incompatible File Formats". In Zerene Stacker, try changing the setting at Options > Preferences > Preprocessing > Use External TIFF Reader. If it does not have a check mark, add one; if it already has one, remove that. If yo...
by rjlittlefield
Wed May 12, 2021 1:37 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: China Blue again - studio style
Replies: 8
Views: 213

Re: China Blue again - studio style

My spidey sense is tingling - this could be the kind of pic that attracts Rik, asking "any chance of a stereo?". Sooo... Your spidey sense is working well! Thanks for the excellent stereos. (The others are great too!) :D In Switzerland we call it "Lerchensporn" (larkspur). Interesting! In the US, o...
by rjlittlefield
Sun May 09, 2021 8:52 am
Forum: Photography Through the Microscope
Topic: Sticky Marine Diatoms
Replies: 3
Views: 134

Re: Sticky Marine Diatoms

Beautiful and informative!

That stereo pair really lets me understand the shape.

--Rik
by rjlittlefield
Sat May 08, 2021 10:32 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Sunset on the lake Nakuru Kenya
Replies: 6
Views: 186

Re: Sunset on the lake Nakuru Kenya

I took the time to look up "kitsch". According to Wikipedia , the term is more complicated than I would have guessed. I might use it here in the sense of paragraph 3: "art deemed kitsch may be enjoyed in an entirely positive and sincere manner." I like the image. Regarding "real", I am reminded of o...
by rjlittlefield
Sat May 08, 2021 4:40 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Simple but good light (for nearly everything) at last...
Replies: 6
Views: 248

Re: Simple but good light (for nearly everything) at last...

Very interesting, as always!

I've added this thread to the list in the FAQ.

That Prior probe-holder is new to me. Searching Google on those terms finds nothing that looks like it. Can you suggest where we could go to find more info or units?

--Rik
by rjlittlefield
Thu May 06, 2021 9:44 pm
Forum: Photography Through the Microscope
Topic: Crystals - nasal mucus
Replies: 5
Views: 211

Re: Crystals - nasal mucus

The gold and maroon one could be worked up into a very nice upholstery fabric!

No one would ever need to know what pattern they were sitting on...

--Rik
by rjlittlefield
Thu May 06, 2021 11:48 am
Forum: Nature Photography -- Macro and Close-up
Topic: Ants: sticking the kids in the nursery
Replies: 4
Views: 221

Re: Ants: sticking the kids in the nursery

Nice shot & montage! These look like nearly mature larvae, not pupae. Except for the few that spin cocoons, ant pupae look more like adult ants except they're cream-colored and have all their limbs tucked in. The adults may have figured it was easier to bring larvae to the food, than food to the lar...
by rjlittlefield
Thu May 06, 2021 9:01 am
Forum: Equipment Discussions
Topic: Parallel sensor alignment / digital spirit levels
Replies: 12
Views: 453

Re: Parallel sensor alignment / digital spirit levels

You could easily build your own super precise leve l. :D That's a very clever device: butane with bubble in a glass tube that is bent slightly by pressure from a couple of adjusting screws. As shown in the video, the builder gets bubble movement of about 2.5 cm for an inclination of about 1 part in...
by rjlittlefield
Tue May 04, 2021 6:47 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Haze?
Replies: 23
Views: 544

Re: Haze?

the second result does not show focus gaps. I am not sure about this, it is hard to tell with the lower resolution image, but I think I might still be able to see the band I highlighted? I am really not sure though. The flash-between is pretty compelling. With my browser, a quick-and-dirty way to s...
by rjlittlefield
Tue May 04, 2021 5:59 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Haze?
Replies: 23
Views: 544

Re: Haze?

Hhmm. Yes, that looks pretty foolproof. So then, a good step in understanding any problem is to reproduce it so that it can be debugged. Have you tried reproducing the problem shown in the first image? If you can reproduce that image with the fuzzy bands, using the same images that went into the sec...
by rjlittlefield
Tue May 04, 2021 3:51 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Haze?
Replies: 23
Views: 544

Re: Haze?

Perhaps I have misunderstood, but... My understanding is that your first and second stacked results (https://www.photomacrography.net/forum/download/file.php?id=3754 and https://www.photomacrography.net/forum/download/file.php?id=3755) used source images from the same acquisition. That is, you shot ...
by rjlittlefield
Tue May 04, 2021 10:37 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Haze?
Replies: 23
Views: 544

Re: Haze?

I'm struggling to figure out how to provide the best help. You started this thread by writing In the below image (unused coffee grounds), I notice some haze in the upper portion. Any clues on the cause? The cause of that problem is now clear: you accidentally omitted some source images while running...
by rjlittlefield
Tue May 04, 2021 9:43 am
Forum: Equipment Discussions
Topic: Help to choose between two Mitutoyo 20x lens
Replies: 10
Views: 263

Re: Help to choose between two Mitutoyo 20x lens

Eric, welcome aboard! Your pictures look excellent. I agree with Scarodactyl, the 20X M Plan Apo is a great objective. But even though the objective is "new", be sure to test it immediately when you receive it. All the Mitutoyo M Plan Apos are easily knocked out of alignment internally by being drop...
by rjlittlefield
Mon May 03, 2021 8:33 pm
Forum: Equipment Discussions
Topic: Musou Black Flock Sheet
Replies: 16
Views: 440

Re: Musou Black Flock Sheet

Thanks, very interesting.

--Rik
by rjlittlefield
Mon May 03, 2021 7:37 pm
Forum: Equipment Discussions
Topic: Musou Black Flock Sheet
Replies: 16
Views: 440

Re: Musou Black Flock Sheet

Based on the earlier post from Rik, I don't think either of these materials is the same as it was back then. That's easy to believe, especially given the 8+ years since my test . Your shots appear to be perpendicular to the sheet. What happens if you test for reflection at shallow angles, typical f...