Search found 596 matches

by dmillard
Tue Nov 27, 2018 9:52 am
Forum: Equipment Discussions
Topic: Tube lens tests for MFT and FF
Replies: 31
Views: 10978

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: 3740

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: 8886

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: 1570

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: 1077

Very nice!
by dmillard
Sat Oct 13, 2018 12:46 pm
Forum: Equipment Discussions
Topic: Lee diffusers?
Replies: 14
Views: 1570

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: 9027

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: 1570

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: 8886

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: 1251

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: 8886

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: 8886

+/- 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...
by dmillard
Mon Oct 08, 2018 2:26 pm
Forum: Equipment Exchange
Topic: SK Makro-Symmar 5.9/120 SR 5.6/120-0059 SOLD
Replies: 0
Views: 1266

SK Makro-Symmar 5.9/120 SR 5.6/120-0059 SOLD

SK Makro-Symmar 5.9/120 SR 5.6/120-0059 line scan lens, optimized for 0.75X magnification. As Robert O'Toole has demonstrated, this lens works extremely well in conjunction with a reversed Xenon. $299 + shipping. Please PM me if you are interested.

The lens has now gone to a good home! :D
by dmillard
Mon Oct 08, 2018 2:08 pm
Forum: Equipment Discussions
Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
Replies: 88
Views: 8886

Well, for anybody that missed out on the Makro-Symmar, I will be posting one for sale very soon! :) As Robert previously said, usedparts-semifa is one of the best. I ordered the lens Thursday, and received it this morning before 9:00 am, extremely well-packed. I then quickly tested it against the Ma...
by dmillard
Sun Oct 07, 2018 6:47 pm
Forum: Equipment Discussions
Topic: Stacked Lens vs APO objectives at 4x with Surprising Results
Replies: 88
Views: 8886

In 2012 I posted that I have a 35mm f/2.0 Mid 1977 (looks much like the one above) 28mm f/2.0 Approx 1943 (looks older!) That's interesting Chris. I just looked in Kingslake's History of the Photographic Lens , and according to him, the Schneider Xenon is an unsymmetrical six element double-Gauss l...