I have not yet been able to establish a rule as to what it depends on. Yes, identifying an exact cause can be difficult. In most cases the errors can be eliminated or at least greatly reduced by using a higher value for the contrast selection threshold. The goal is to get ambiguous regions filled i...

Very interesting!

In the final image, it looks like the water drop has been made translucent or opaque by tan stuff dispersed in it.

Are those loose spores that are now ready to be washed out, or is something else happening?

--Rik

Hello everyone, interactive 3D: https://skfb.ly/oTMnU Best, ADi I am bothered by the black spikes in this model. Those look to me like depth map errors made by Zerene Stacker, typically caused by bright surrounding features spreading into very dark regions as the area goes OOF. They may have little...

Am I understanding correctly that this depends on the depth of field of the front lens? ... That is, the Schneider Componon-S 50mm has a rated depth of field that is several times greater than that of a 10x microscope lens, and therefore when the zoom is reduced from 10x to 5x, the depth of field s...

I learned long ago that elimination of translation movements during stacking gives a sharper result, so I now turn off all corrections. Key to being able to do this is to ensure no movements. Capturing during a fast flash can help individual images, but if image to image movement is large, translat...

Do you all set a wb on the canon bodies even when shooting at high mag (like 10x+) with objectives? I've been meaning to ask, since I just default to 5500k fixed for the flashes. I didn't know if a white balance reference would break down for usefulness at high mag or not. There is nothing special ...

The larvae of these things can also wreak havoc on insect collections, for example pinned or papered moths and butterflies.

The adult beetles are covered by scales that have an interesting structure -- see viewtopic.php?f=27&t=46039 .

--Rik

...some camera controls such as mode switching and setting custom color balance require touching the camera. On another note, the EOS Utility color temperature slider works for me without touching the camera? Are we talking about the same thing? Different thing. I am talking about the workflow wher...

I use Canon R7 tethered to either an M1 Mac or a Windows laptop, using Canon EOS Utility 3 for most functions: live view, image uploading typically after external shutter triggered by wire from a focus rail, and some camera controls such as exposure time and color balance. Some camera controls such ...

Some of the egg clusters that I moved indoors have hatched. Here's a view by cell phone through a stereo scope: https://janrik.net/MiscSubj/2024/YellowEggsOnLocustBark_20240420/PXL_20240422_061409108.jpg To me these look like lady beetle larvae, which would make sense given the location, time of yea...

It is true that 'in' focus items are not effected by the apodization BUT (what I believe is a major problem with photography) too many people forget that depth of field is a giant myth. There is one and only one plane 'in' focus. Depth of field is based on an assumption that we can be slightly out ...

Laowa makes good lenses but dropped this one and sold remaining supplies at about half the original list. I am confused about availability. At this moment https://www.venuslens.net/product/laowa-105mm-f2/ is showing "in stock" with a price of "$419.00 – $699.00". I'm also seeing in stock at B&H Pho...

Thanks for the info and link. That description also notes that locust borer eggs are laid in late summer and hatch in the fall, not consistent with these in spring. I searched the tree more carefully yesterday and found four smaller clusters that were exposed on flat bark so I could collect them wit...

I can't recall if I've ever pointed you here: https://www.photomacrography.net/forum/viewtopic.php?t=19582 , "False color and detail/DOF from shiny metal". It's a long thread that discusses some of the unexpected effects caused by shiny subjects and narrow-angle light sources. The short story is tha...

I was actually initially a bit more disappointed that I wasn't seeing some interesting colors, I was hoping it might do something "interesting" heh. Large NA is not a friend of structural colors. A quick explanation is that the wide entrance cone is looking at each point on the subject from a bunch...