I would like to upload some OpenSCAD files for the mounts I mentioned above. Is there a file upload feature on this forum? In attachments I can only upload certain file types. In general, this forum has disabled uploads of everything except small image files, due to concerns about server capacity a...

Thanks for the post. For future reference, here are direct links to the article: http://www.microscopy-uk.org.uk/mag/artoct20/ms-hand-sectioning-plants.html http://www.microscopy-uk.org.uk/mag/artoct20/ms-hand-sectioning-plants.pdf http://www.microscopy-uk.org.uk/mag/artoct20/ms-hand-sectioning-plan...

Experimenting with graduated backgrounds swapped out in post. Turned out to be quite pleasing. Not sure if doing so falls under the title of "excessive post processing" When in doubt, just say what you did. In a case like this, where somebody says that they're experimenting with a new technique tha...

Macro_Cosmos wrote: ↑

Tue Oct 27, 2020 5:26 am

100x objective mag, DIC. More info and bigger here: https://flic.kr/p/2jZFm1b

Lou Jost wrote: ↑

Tue Oct 27, 2020 2:49 pm

I am puzzled, the scale seems way off if this is the cross section of a porcupine quill.

Looks like a typo. The Flickr posting says 10X objective, 9 images stitched.

--Rik

Interesting -- and it's not every day I learn a new word with only three letters!

--Rik

If that last image is a whole frame, shrunk to fit the forum, then I'm going out on a limb and suggest that maybe it's dust on the rear element of the 200 mm telephoto. I'd expect anything on the sensor to look a lot sharper under that condition. It's very unlikely to be anywhere on or in the objec...

difficulty of getting digital calliper blades into the right angle made by the dovetail with the base of the condenser. The standard way around this difficulty is shown at https://www.engineersedge.com/mechanical,045tolerances/measuring_and_designing_dovetail_slides_14212.htm : https://www.engineer...

I assume that you're referring to the ASDF shortcut keys for the StackShot controller panel inside Zerene Stacker. Those will work only when the StackShot controller panel has keyboard focus. If you mouseclick anywhere outside that panel, then whatever you clicked on will get keyboard focus, and the...

interesting image, looks like the claws have gone missing on both feet.

--Rik

Red-bordered Emerald moth?

http://www.pwconserve.org/wildlife/insects/moths/redborderedemerald.html

--Rik

optimized for looking through thick glass. That would be very interesting and useful! Well, it's just a wild guess. But I have used microfilm/microfiche readers that had carrier plates maybe 5 mm thick, and the text on screen looked good everywhere. Working distance on those readers was pretty shor...

That's an unusual level of precision on the focal length: 22.25 mm. Seems like it must have been made for some very specific purpose.

My wild guess would be that it's a microfilm/microfiche lens, optimized for looking through thick glass.

--Rik

Thanks for the comment on the 'cancellation' of the AA filter in the 5DS-R - I thought it was removed, not some software attempt to counter it. The cancellation is done optically, sort of a split-and-recombine trick. See https://www.bhphotovideo.com/explora/photography/tips-and-solutions/canon-eos-...

Interesting images.

Can you tell us more about "Pseudo-DIC" ? My naive guess would be that it's some form of oblique, but more details or a link would be helpful.

--Rik

Is slabbing supposed to help ease the pain of halos? I am using ZS Pro (free trial) and in what little chance I've had to actually use it, it seemed I had about as much halo artifact in the slabbed hairy spider that I recently stacked, as the same spider stacked without slabbing. But I am hoping th...