Search found 599 matches

by dmillard
Wed Nov 28, 2018 12:10 pm
Forum: Equipment Discussions
Topic: tube lens comparison
Replies: 17
Views: 3958

Re: tube lens comparison

However, the Olympus UIS system is designed only for an image circle of 22 mm, the UIS2 system for over 26 mm. This *might* limit the usable image circle of the U-TLU (which is a UIS component, not UIS2) to Micro 4/3, or possibly APS-C. Hello Enrico, I just reread your comments a little less hastil...
by dmillard
Tue Nov 27, 2018 6:03 pm
Forum: Equipment Discussions
Topic: tube lens comparison
Replies: 17
Views: 3958

Hello Jin, I also have both tube lenses. Inspired by Charles Krebs' post here , I mounted an Olympus super-widefield trinocular head (which incorporates a U-TLU) on my Nikon UM-2 Measurescope, and use it with both Olympus UIS/UIS2 and Mitutoyo objectives. I have been very pleased with the results on...
by dmillard
Tue Nov 27, 2018 9:52 am
Forum: Equipment Discussions
Topic: Tube lens tests for MFT and FF
Replies: 31
Views: 11045

Lou,

Thank you for the excellent review!

Best regards,
David
by dmillard
Sun Nov 11, 2018 7:46 am
Forum: Equipment Exchange
Topic: Wanted: Nikon CFI 10X objective
Replies: 4
Views: 3832

Sending you an email.
by dmillard
Sun Oct 14, 2018 6:17 pm
Forum: Equipment Discussions
Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
Replies: 88
Views: 8995

RobertOToole wrote:Then I lower the camera rig, usually without the objective
:wink:
by dmillard
Sun Oct 14, 2018 2:36 am
Forum: Equipment Discussions
Topic: Lee diffusers?
Replies: 14
Views: 1618

Thanks for the clarification Rik!
by dmillard
Sat Oct 13, 2018 4:34 pm
Forum: Photography Through the Microscope
Topic: NEW Parasite Image Database - The Monster Hunter's Guide!
Replies: 6
Views: 1090

Very nice!
by dmillard
Sat Oct 13, 2018 12:46 pm
Forum: Equipment Discussions
Topic: Lee diffusers?
Replies: 14
Views: 1618

Hello Carlos, I just took a couple of quick pictures showing cylinders of Lee filter material on a Mitutoyo and an Olympus objective. I think you can see that they are in little danger of deformation. I like to write on them with an extra fine point Sharpie marker so I don't have to waste time rumma...
by dmillard
Sat Oct 13, 2018 6:20 am
Forum: Administrator's Appreciation Gallery...Photography Through the Microscope
Topic: Callus remover
Replies: 16
Views: 9852

Marek,

Thank you for sharing this voluptuous image! It has inspired me to attempt something significant today.

Best regards,
David
by dmillard
Wed Oct 10, 2018 7:31 pm
Forum: Equipment Discussions
Topic: Lee diffusers?
Replies: 14
Views: 1618

On the LEE website the demonstrations seem to suggest that the sheets are very thin and therefore difficult to build a stable cylinder. Is the thickness of the sheet an option when buying the product? Thanks in advance, Carlos Magno Hello Carlos, These filters bend easily as flat sheets, but form v...
by dmillard
Wed Oct 10, 2018 10:23 am
Forum: Equipment Discussions
Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
Replies: 88
Views: 8995

Re: hidden gem...

Thats the WA 35mm I assume, not the 30mm enlarger lens? The enlarger lens had serious CA issues. @dmillard: I think you use(d) this Minolta MD 2.8/35 mm SLR lens, latest Series is MD-III http://www.artaphot.ch/minolta-sr/objektive/150-minolta-35mm-f28 http://artaphot.ch/images/Technik/Sony_E_Full_F...
by dmillard
Tue Oct 09, 2018 7:15 pm
Forum: Equipment Exchange
Topic: Schneider-Kreuznach V38 parts and Unifoc 76
Replies: 1
Views: 1275

Oddss and ends

PM sent

Best regards,
David
by dmillard
Tue Oct 09, 2018 5:07 pm
Forum: Equipment Discussions
Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
Replies: 88
Views: 8995

3) retrofocus means the WD is at least reasonably good - ................................................................................................... 4) Some of them eg the Canons are good, lightweight, optically modern designs and not comparatively expensive. 5) several of us probably have ...
by dmillard
Tue Oct 09, 2018 4:47 pm
Forum: Equipment Discussions
Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
Replies: 88
Views: 8995

+/- 20% strikes me as a narrow range, particularly for a lens with a modest aperture. It makes one wonder which optimization SK care about most. Perhaps it's distortion? I guess it would be necessary to look very critically, at the rated mag. Qioptiq's Inspec.x L 5.6/105 line-scan lenses have simil...