Search found 19102 matches

by rjlittlefield
Wed Oct 05, 2022 10:52 pm
Forum: Nature Photography -- Macro and Close-up
Topic: Spider vs spider, little one wins
Replies: 1
Views: 26

Spider vs spider, little one wins

Last year I documented the mating season of large European house spiders ( Tegenaria gigantea = Eratigena duellica ), around the outside of one of my windows. This year that species has been essentially absent. Instead, we have seen only a much smaller species, which I now think is probably Parastea...
by rjlittlefield
Wed Oct 05, 2022 1:54 pm
Forum: Photography Through the Microscope
Topic: Anemia
Replies: 8
Views: 232

Re: Anemia

Thanks for the clarification. A lot of the confusion is my fault, due to never writing any detailed documentation about the mask. I apologize for the lapse. But let's not give up too quickly on your idea... Looking at your original depth map, what I think I see is that brighter corresponds to foregr...
by rjlittlefield
Tue Oct 04, 2022 4:56 pm
Forum: Photography Through the Microscope
Topic: Anemia
Replies: 8
Views: 232

Re: Anemia

I am confused about what you've done. As far as I know, there is no facility in Zerene Stacker for working with an external depth map. Depth maps can be exported, but not imported. There is an external depth map mask , specified as "Use external mask" at Options > Preferences > DMap Settings. But th...
by rjlittlefield
Tue Oct 04, 2022 8:43 am
Forum: Photography Through the Microscope
Topic: Mitosis (onion root - acetic orcein - DIC - panorama)
Replies: 14
Views: 5189

Re: Mitosis (onion root - acetic orcein - DIC - panorama)

Yes, I needed a general tutorial. In that case, I suggest to start by asking any internet search engine about something like differential interference contrast tutorial . At this moment Google returns to me several YouTube videos that appear relevant, plus https://www.scientifica.uk.com/learning-zo...
by rjlittlefield
Mon Oct 03, 2022 5:50 pm
Forum: Beginners Micro
Topic: Orange flatworms
Replies: 1
Views: 41

Re: Orange flatworms

Images?

--Rik
by rjlittlefield
Mon Oct 03, 2022 4:43 pm
Forum: Nature Photography -- Macro and Close-up
Topic: An interesting orbweaver
Replies: 2
Views: 79

Re: An interesting orbweaver

Lovely and interesting! I have never seen a retreat like this.

--Rik
by rjlittlefield
Mon Oct 03, 2022 11:11 am
Forum: Photography Through the Microscope
Topic: Mitosis (onion root - acetic orcein - DIC - panorama)
Replies: 14
Views: 5189

Re: Mitosis (onion root - acetic orcein - DIC - panorama)

Please note, this is a 9-year-old thread, resurrected by new poster Sm55 to ask for help on a technical issue. Sm55 , your question would be better posted in a different part of the forum, either "Macro and Micro Technique and Technical Discussions", or perhaps better in "Beginners Micro". When you ...
by rjlittlefield
Mon Oct 03, 2022 10:31 am
Forum: Beginners Macro
Topic: 5x with a budget rail and tripod?
Replies: 15
Views: 396

Re: 5x with a budget rail and tripod?

"With a good bellows that allows the rear of the bellows to move you can use rear stepping and do not need to worry about a precision rail." Rear stepping is moving the rear element of the bellows closer to the subject for each frame of the focus stack rather than moving the entire bellows closer t...
by rjlittlefield
Sun Oct 02, 2022 3:49 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Quirks of Canon R7 full electronic shutter
Replies: 7
Views: 203

Re: Quirks of Canon R7 full electronic shutter

It is possible that such hints exist with the R7 also Even better... The R7 has an option to produce audible clicks at nominal start and end of exposure. (This is with electronic shutter, but "Silent shutter function" off.) I do not hear these clicks in the headphone output, but they are easily det...
by rjlittlefield
Sun Oct 02, 2022 10:34 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Quirks of Canon R7 full electronic shutter
Replies: 7
Views: 203

Re: Quirks of Canon R7 full electronic shutter

I trigger the flashes in ½ shutter speed + delay. It runs really stable at shutter speed 1/10 s and of course larger. Is this for your Canon M6 Mark II ? In any case your camera must have less variation than my R7. With my R7, shutter speed of 1/10 second = 100 ms would cause a lot of the flashes t...
by rjlittlefield
Sat Oct 01, 2022 9:34 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Quirks of Canon R7 full electronic shutter
Replies: 7
Views: 203

Quirks of Canon R7 full electronic shutter

SUMMARY Using full electronic shutter, my Canon R7 camera shows up to 130 milliseconds variation in lag time between cabled remote shutter pulse and start of exposure. The pattern of this delay varies strongly depending on circumstances. In some situations the delay varies almost uniformly across t...
by rjlittlefield
Sat Oct 01, 2022 5:52 pm
Forum: Photography Through the Microscope
Topic: Anemia
Replies: 8
Views: 232

Re: Anemia

iconoclastica wrote:
Wed Sep 28, 2022 1:35 pm
Wouldn't it be possible to edit the depthmap and rerun the stack with it?
I think I am not understanding the idea.

In principle one could re-render the stack given an edited depthmap.

But then how would the depthmap get edited, without doing something equivalent to manual retouching?

--Rik
by rjlittlefield
Sat Oct 01, 2022 5:42 pm
Forum: Administrator's Appreciation Gallery...Photography Through the Microscope
Topic: Drosophila melanogaster, recently eclosed adult (Stephen_De_Lisle)
Replies: 0
Views: 37

Drosophila melanogaster, recently eclosed adult (Stephen_De_Lisle)

The following image represents the winning thread for the October 2022 award for Micro. It was originally posted at https://www.photomacrography.net/forum/viewtopic.php?t=45095 . We're reproducing the image here, separately, as part of our procedure to provide clarity when the front page shows one i...
by rjlittlefield
Sat Oct 01, 2022 3:30 pm
Forum: Photography Through the Microscope
Topic: Administrators Appreciation Award Winners for October 2022
Replies: 0
Views: 46

Administrators Appreciation Award Winners for October 2022

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor David Yager (dy5) for his mantis deimatic display, the image at https://www.photomacrography.net/forum/viewtopic.php?t=45200 . In the Photomicrography Forum, we hono...
by rjlittlefield
Sat Oct 01, 2022 3:28 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Administrators Appreciation Award Winners for October 2022
Replies: 0
Views: 47

Administrators Appreciation Award Winners for October 2022

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor David Yager (dy5) for his mantis deimatic display, the image at https://www.photomacrography.net/forum/viewtopic.php?t=45200 . In the Photomicrography Forum, we hono...