I have read quite a bit about fly eyes, but I do not recall ever seeing this specific issue addressed. Searching today, I found only that there is a "pupil" mechanism that limits light transfer to the receptors. "The fully light-adapted pupil diminishes the photoreceptor's acceptance angle by a fact...

The following image represents the winning thread for the August 2020 award for Micro. It was originally posted as image #4 at https://www.photomacrography.net/forum/viewtopic.php?t=42095 . We're reproducing it here, separately, as part of our procedure to provide clarity when the front page image w...

The following image represents the winning thread for the August 2020 award for Macro. It was originally posted at https://www.photomacrography.net/forum/viewtopic.php?t=41853 (image #1 of that thread). We're reproducing the image here, separately, as part of our procedure to provide clarity when th...

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor Saulius Gugis for his "Gymnosporangium rust", at https://www.photomacrography.net/forum/viewtopic.php?t=41853 . In the Photomicrography Forum, we honor David Kelly (...

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor Saulius Gugis for his "Gymnosporangium rust", at https://www.photomacrography.net/forum/viewtopic.php?t=41853 . In the Photomicrography Forum, we honor David Kelly (...

We are pleased to announce this month's winners of the Administrators Appreciation Awards! :D In the Photomacrography Forums, we honor Saulius Gugis for his "Gymnosporangium rust", at https://www.photomacrography.net/forum/viewtopic.php?t=41853 . In the Photomicrography Forum, we honor David Kelly (...

And a short video during breakfast. Klick for Video This looks like healthy feeding of a probably 2nd instar larva. ("2nd instar" is between first and second molts.) The earlier video, at https://www.youtube.com/watch?v=GWpVsyitBak , looked like defensive behavior of a caterpillar in its resting st...

Nice image. This looks like the resting state between larval stages, where the caterpillar has grown as large as it can inside its current skin, and is taking a break from eating to grow a new skin and a new head capsule, inside the old skin and head. Soon it will split the skin in the front, the ol...

https://janrik.net/MiscSubj/2020/BumblebeeFromVet20200722/2020-07-28-20.39.59-ZS-retouched-small.jpg This specimen came to me for identification. It had been killed the previous day, after stinging a bee-sensitive person. The person's bad reaction had resolved well, but for future reference they wa...

Ichthyophthirius wrote: ↑

Wed Jul 29, 2020 1:04 am

does anyone know the NA of the MP-E at 5x?

Wide open, NA 0.149 (effective f/16.8 at sensor).

--Rik

Emabrengi wrote: ↑

Tue Jul 28, 2020 1:19 pm

Canon 100mm f/2.8 mkII

I do not recognize that name for a lens. I have the Canon EF 100mm f/2.8L Macro IS USM, which is excellent.

--Rik

Yes, that's the beast! Nicely shot.

--Rik

could be Beauveria bassiana “Icing Sugar Fungus” or a similar fungus. Good idea, some sort of fungus does seem likely. It's impressive that Google search on icing sugar fungus turns up a #2 hit for https://en.wikipedia.org/wiki/Beauveria_bassiana , despite the fact that that article does not contai...

Hhmm... I notice the photo was taken with backlighting, and apparently there is plenty of light diffusing through the fish to make it appear only dark gray.

It seems an excellent image for showing the shape of the fish, but not very helpful for the ultra-black feature being discussed!

--Rik

In the Helicon Focus menu system, take a look at "File > Remove all images". You can also select individual images and do File > "Remove image" to get rid of just those. These operations are also available in the right-click popup menu in the list of files.

--Rik