If I understand correctly, the point of Olympusman's "feathering" approach is to produce an asymmetric cone of light, which then gives a sort of 3D appearance. I assume the Expanding Stop would do the same thing if swung off-center, but that's because of the swing, not the expanding feature. Please ...

The combination of DCR-250 and DCR-150 will be even stronger than the DCR-250 alone. Changing the separation between those two will change the overall power by a small amount, but I doubt that you would perceive it as anything "like a zoom lens". Separating the Raynox lenses will also introduce a st...

Macron, please check your "Private messages".

You can do that by using the link at the upper right corner of any forum page, next to your username.

--Rik

what is a ‘feathered darkfield stop’ (as opposed to a regular darkfield stop). I would guess Olympusman is referring to the technique he described at https://www.photomacrography.net/forum/viewtopic.php?p=245763#p245763 : In photographic lighting, a feathered edge from a light source is attained by...

Lovely! And I see that www.geoforum.fr is working again -- nice!

--Rik

Really nice comparison -- thanks!

--Rik

As of this moment, all images at www.geoforum.fr are not accessible, because of an SSL certificate problem. Chrome reports the difficulty as "NET::ERR_CERT_DATE_INVALID". I do not know a good workaround, since it appears that www.geoforum.fr automatically upgrades an HTTP connection to HTTPS, which ...

Here is another comparison that I find interesting. These are corresponding sections, the first from 12000x9000 as downloaded, the second from 6000x4500 upscaled to 12000x9000. The 6000x4500 was made by Photoshop's Image > Image Size..., with "Bicubic (smooth gradients)" resampling. Again, display u...

By the way, I looked again. If I go through https://flic.kr/s/aHsmVfrTBn to reach the album, then I cannot find any way to access camera-resolution versions of the images. For the scene corresponding to https://live.staticflickr.com/65535/51112917357_b3a566f9a8_o.jpg , Flickr offers me only up to "L...

Thanks, those work. I pulled down the images and did some pixel-peeping. The extra pixels definitely help. Here are corresponding sections of the 12000x9000 at 200%, versus 6000x4500 at 400%. The 6000x4500 was made by Photoshop's Image > Image Size..., with Bicubic Sharper resampling. Display using ...

Adalbert wrote: ↑

Tue Apr 13, 2021 6:18 am

Hello everybody,
Enclosed you will find some JPGs 12000x9000px:
https://flic.kr/s/aHsmVfrTBn
Best, ADi

I tried several of the images and found nothing approaching that size, even when selecting the option to see all sizes.

Where exactly should I be looking?

--Rik

For whatever it's worth... After Beatsy's first post I immediately tried Lab in Photoshop, using a Curves adjustment layer on the "Lightness" channel. What I found was that even with Lightness pushed to its upper limit, the resulting image went nowhere beyond a bright yellow, something like RGB=[255...

recommends to get the PCR Covid test in a week after the 2nd shot and it should show positive. I suspect some scrambling in the communication. Everything I read says that Moderna is an mRNA vaccine. It stimulates antibody production so it will likely produce a positive antibody test, just like a pr...

Sounds interesting!

I'm glad to see that this will be available later as a recording, for those of us who are in radically different time zones.

--Rik

Rashkh, welcome to photomacrography.net. I'm the fellow who wrote Zerene Stacker, and I answer all the support requests that come in by email. Here is what I recently wrote to another fellow: >Any comments on the Apple M1 for this sort of work? Is it much faster? It's a great chip, but important to ...