Search found 69 matches

by physicsmajor
Wed Jan 13, 2021 11:58 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Help with Zerene Stacker
Replies: 11
Views: 373

Re: Help with Zerene Stacker

Re: fuzziness around fine suspended structures like these hairlike projections While it won't remove this effect completely (as noted it's due to the optical system), the best method I have found to minimize this is using slabbing leveraging Zerene's PMax algorithm. The PMax algorithm tends to creat...
by physicsmajor
Fri Jan 01, 2021 5:37 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Edges of the stacked image is distorted
Replies: 4
Views: 304

Re: Edges of the stacked image is distorted

As an interesting aside/continuation - depending on your subject, in particular if it is in part translucent, you may have to deal with these stacking artifacts even if your optical system is perfect. They'll appear from details behind or included in the translucent material; that translucent materi...
by physicsmajor
Sun Dec 27, 2020 2:39 pm
Forum: Equipment Discussions
Topic: JML Optical 100mm f2 bellows lens
Replies: 5
Views: 411

Re: JML Optical 100mm f2 bellows lens

If another appears in a Nikon mount like that one you linked, I'd take a shot at it.
by physicsmajor
Thu Dec 24, 2020 2:01 pm
Forum: Equipment Discussions
Topic: Megadap adapter for nikon Z - for focus stacking?
Replies: 1
Views: 151

Megadap adapter for nikon Z - for focus stacking?

This adapter is intriguing, Ken Rockwell obviously only tested it for normal photography but with 6.5 mm travel of motorized helicoid under the electronic command of the camera it seems like there would be potential for this to be an all-in-one focus stacking solution into the approximate 2-10x rang...
by physicsmajor
Sun Dec 13, 2020 2:27 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Inclusion in quartz grain
Replies: 2
Views: 503

Re: Inclusion in quartz grain

Very nice, I really like stereo views into inclusions and transparent crystal surfaces!

These inclusions are most likely rutile (titanium dioxide). To the naked eye they look like golden needles, but all the lovely crystal texture along the spike is revealed in high mag.
by physicsmajor
Mon Dec 07, 2020 5:37 pm
Forum: Equipment Discussions
Topic: Speccing out a jewelry photography setup
Replies: 6
Views: 839

Re: Speccing out a jewelry photography setup

Parfocality is going to be your main limiting factor, most of the usual suspects either aren't zooms, don't perform anywhere close to worth considering, or aren't parfocal. You have a few usual suspects in terms of industrial inspection zooms at hand it sounds like. Other fancy industrial line-scan ...
by physicsmajor
Sat Oct 17, 2020 11:58 am
Forum: Equipment Discussions
Topic: Canon DSLR discounts
Replies: 9
Views: 2371

Re: Canon DSLR discounts

I have a Minolta 5400 and the 7-element Scanner-Nikkor, which in their appropriate ranges I believe do resolve at this level. I also have a Mity 5x and 10x with CH-200 tube lens, which I believe also resolve at this level, though unsure if Mitutoyo lenses fill a full frame sensor. Within the Nikon s...
by physicsmajor
Fri Oct 16, 2020 8:01 pm
Forum: Equipment Discussions
Topic: Canon DSLR discounts
Replies: 9
Views: 2371

Canon DSLR discounts

The high-end Canon DSLRs are currently incredibly aggressively discounted. Canon has disclosed their intention to shift focus to mirrorless and their new R-series bodies and lenses seem to lead the pack. That has led to the most aggressive discounts I have ever seen on actual top-end equipment: the ...
by physicsmajor
Sun Oct 04, 2020 5:19 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Wulfenite on Mimetite
Replies: 6
Views: 2028

Re: Wulfenite on Mimetite

In the interest of full disclosure, I generally run my images through Perfectly Clear 3.5. However, I strive to use this for whole-image correction closer to actual color/what I see through the viewfinder rather than to apply something like an Instagram filter. I do not change the color balance. Thi...
by physicsmajor
Mon Sep 28, 2020 9:05 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Wulfenite on Mimetite
Replies: 6
Views: 2028

Wulfenite on Mimetite

Thumbnail size specimen of Wulfenite on Mimetite from the Rowley mine, Maricopa county, AZ . A few chips and broken corners but the overall specimen is quite nice. wulfenite_mimetite00_pmax_of_pmax_reduced.jpg After Robert's recent article where he found the Scanner-Nikkor ED 7 element lens did quit...
by physicsmajor
Sun Sep 27, 2020 9:48 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Laser aiming and focus in photomacrography
Replies: 51
Views: 48287

Re: Laser aiming and focus in photomacrography

I ordered a couple of these diodes and heatsinks/mounts. I'm going to experiment with 3D printing a mount for the heatsink, as well as just directly 3D printing a mount for the diode for Nikon.

If successful I'll post the STL files.
by physicsmajor
Sat Sep 05, 2020 10:56 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Boulder opal
Replies: 4
Views: 1360

Re: Boulder opal

I manually swapped because in the preview view, this looked incorrect. Then on revision I opened the incorrect version and manually swapped it again, resulting in the same output (with a bit of cropping on the edges to remove the lines from stereo artifacts). This is the actually corrected version. ...
by physicsmajor
Sat Sep 05, 2020 6:57 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Boulder opal
Replies: 4
Views: 1360

Re: Boulder opal

It's come to my attention the stereo pair from the first 10x image is likely swapped; see if this works better.
opal_boulder03_pmax_stereo_corrected_resized.jpg
by physicsmajor
Fri Sep 04, 2020 4:50 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Boulder opal
Replies: 4
Views: 1360

Boulder opal

Yoweh boulder opal in ironstone matrix, SW Queensland, Australia. This small specimen is presented along its natural cleavage face (irregular, no polish) showing significant multicolored fire throughout dark gray translucent opal in the shattered orange/brown host rock. 2.7x magnification with Minol...
by physicsmajor
Sun Aug 30, 2020 9:46 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Questions for the experts.
Replies: 12
Views: 2525

Re: Questions for the experts.

Long story short, bigger sensor isn't necessarily better when it comes to photomacrography. You've got the same body I do one generation newer (I currently use the D7000) and while a bit more resolution might be nice, the truth is I'm getting excellent results. I'm planning to shoot the shutter out ...