Search found 18264 matches

by rjlittlefield
Fri Jun 11, 2021 11:37 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Mayfly molting from subimago to adult
Replies: 3
Views: 44

Re: Mayfly molting from subimago to adult

I expect this is a female of the same species. She turned up on my screen door this afternoon. This is a short studio stack, 4 frames at nominal f/8, 5X, cropped to match the male eyes. Subject released to go play. https://janrik.net/MiscSubj/2021/MayflyMolting_20210609/PMax-0218-0221.jpg Here are t...
by rjlittlefield
Fri Jun 11, 2021 11:26 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Mayfly molting from subimago to adult
Replies: 3
Views: 44

Re: Mayfly molting from subimago to adult

Right, the claws of the old skin are not moving on the plastic box. I don't know exactly how they're sticking to it, but there's definitely some weak adhesion there. However, that doesn't affect the aspect that is puzzling me. What's puzzling me is that the adult coming out of the old skin is not to...
by rjlittlefield
Fri Jun 11, 2021 6:47 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Mayfly molting from subimago to adult
Replies: 3
Views: 44

Mayfly molting from subimago to adult

https://janrik.net/MiscSubj/2021/MayflyMolting_20210609/MoltAnimation_small.gif There's a backstory, of course. A couple of nights ago, a mayfly landed on my hand while I was standing in my yard doing nothing in particular. When I looked at it, I was surprised to see that it was a relatively large ...
by rjlittlefield
Thu Jun 10, 2021 10:58 am
Forum: Equipment Discussions
Topic: 0/-/+ order for focus bracketing
Replies: 2
Views: 105

0/-/+ order for focus bracketing

I recently learned from a Zerene Stacker support request that the Panasonic Lumix G9 camera provides a focus bracketing mode that starts in the middle and works its way to both ends, swinging focus in wider and wider intervals as the sequence proceeds. When processed by Zerene Stacker in natural ord...
by rjlittlefield
Thu Jun 10, 2021 9:16 am
Forum: General Discussion Forum and Community Announcements
Topic: use Bing to search PMN
Replies: 5
Views: 114

Re: use Bing to search PMN

The built-in "phpBB native" search facility only does unordered combinations. However, phpBB now supports an alternative search backend, "MySQL fulltext". I have tested that on the demotest forum, and it seems to do what you want. So, I have converted the real forum to use MySQL fulltext search also...
by rjlittlefield
Tue Jun 08, 2021 3:49 pm
Forum: General Discussion Forum and Community Announcements
Topic: use Bing to search PMN
Replies: 5
Views: 114

use Bing to search PMN

Summary: for searching photomacrography.net, the best external search engine right now is Bing . Bing's coverage is far better than Google's coverage at this time. The forum's own internal search engine is also quite good. It is at https://photomacrography.net/forum/search.php , reachable through t...
by rjlittlefield
Tue Jun 08, 2021 2:46 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: ZS Advanced Interpolators
Replies: 4
Views: 124

Re: ZS Advanced Interpolators

You're very welcome. It may help also to read the rest of that thread. There's another post a little farther down where I illustrate the ringing effect. I had forgotten about both of these posts (from 2013!). I found them by searching the forum for Zerene advanced interpola* . Other possibly interes...
by rjlittlefield
Tue Jun 08, 2021 12:43 pm
Forum: Nature Photography -- Macro and Close-up
Topic: Back to macro
Replies: 4
Views: 248

Re: Back to macro

Brundle Fly, welcome back! but everything is a little out of focus I agree that everything is a little soft, but certainly this is not due to missing focus because the picture includes areas that are in front of focus, in back of focus, and everything in between. So the softness is probably caused b...
by rjlittlefield
Mon Jun 07, 2021 2:10 pm
Forum: Equipment Discussions
Topic: Need help on putting a Microscope Objective on a zoom lens
Replies: 22
Views: 427

Re: Need help on putting a Microscope Objective on a zoom lens

Raf, good to hear from you!

Thanks for clarification regarding your handling of Nikon BD versus Mitutoyo threads. It's nice to know that they both work because of explicit design.

--Rik
by rjlittlefield
Mon Jun 07, 2021 9:54 am
Forum: Equipment Discussions
Topic: Need help on putting a Microscope Objective on a zoom lens
Replies: 22
Views: 427

Re: Need help on putting a Microscope Objective on a zoom lens

Yes, expect vignetting. You only need this ring: https://rafcamera.com/m26-5-to-m72-thread-adapter got it here for $17.46*****LINK REMOVED then came the big shipping cost. ring adapter with shipping 42.46 USD i cried on check out {-o< cant find that adapter ring no where its hard to find It says fr...
by rjlittlefield
Sun Jun 06, 2021 11:36 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Tongue of the bumblebee
Replies: 13
Views: 354

Re: Tongue of the bumblebee

Thank you for the further explanation. I am familiar with the effect that you describe, but I have always interpreted the problem as "not quite dead yet, guess I should have left them longer in the fumes". It is definitely frustrating, and disturbing that I may have left the bug to suffer (whatever ...
by rjlittlefield
Sun Jun 06, 2021 10:06 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Special slide + reconstruction algorithm = super resolution microscopy
Replies: 5
Views: 333

Re: Special slide + reconstruction algorithm = super resolution microscopy

Assuming the images are a true representation at that scale, the results are fantastic. For me the most convincing evidence of accuracy are the images in Figures 4b-4g, comparing their reconstruction with SEM images of the same bead pattern. I expect that isolated point emitters are the simplest po...
by rjlittlefield
Sun Jun 06, 2021 9:52 am
Forum: Nature Photography -- Macro and Close-up
Topic: Critter Mix
Replies: 4
Views: 101

Re: Critter Mix

Nice collection! I especially like the "staring me down" impression for the drone fly.

--Rik
by rjlittlefield
Sun Jun 06, 2021 9:47 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: On the odd aspects of how light Really works...
Replies: 2
Views: 125

Re: On the odd aspects of how light Really works...

We used his Lectures series as a textbook in introductory physics. Me too. In fact, as I write this, there is still a copy prominently visible on my bookshelves. But somehow the title of the QED book had always warned me off, and the Wikipedia article on "Quantum electrodynamics" did nothing to dis...