Search found 635 matches

by dmillard
Sun Jan 06, 2019 6:45 pm
Forum: Equipment Discussions
Topic: Sensor cleaning - using swabs more than once
Replies: 12
Views: 7094

The first image is a pleasure to look at (in addition to the useful information conveyed). :)
by dmillard
Tue Jan 01, 2019 6:16 am
Forum: Equipment Discussions
Topic: Leica HR 4x/0.45 Objective On Ebay How is That Even Possible
Replies: 22
Views: 5694

edited to add: anyone tested the Edmund/Optem(I believe) 5x NA 0.225 objectives? If so, how good is the coverage? Mark Goodman tested it on a Nikon D300 (APS-C). His results can be found under Microscope objectives: http://www.coinimaging.com/lens_tests_new.html He was not impressed - his results c...
by dmillard
Mon Dec 31, 2018 8:39 am
Forum: Equipment Discussions
Topic: nikon M plan 20x 0.40 elwd - CA question
Replies: 10
Views: 2420

Re: nikon M plan 20x 0.40 elwd - CA question

Hi all, I have question about Nikon M plan 20 0.40 210/0 ELWD. Is it normal, that objective has so much CA? Does anyone have similary result? Hello Filip, Some CA is often seen with this objective, but nevertheless it is still capable of producing good results. I did a comparison test on here eons ...
by dmillard
Sun Dec 30, 2018 5:20 pm
Forum: Equipment Discussions
Topic: Schneider 28mm f2.8 Componon Perf Stacked is Extremely Good
Replies: 32
Views: 7139

ray_parkhurst wrote:Looks like that "Apo" lens will have some strong red hues when focused 200um high.
And even more in this "Apo" lens! :shock:
Image
by dmillard
Sun Dec 30, 2018 11:08 am
Forum: Equipment Discussions
Topic: Schneider 28mm f2.8 Componon Perf Stacked is Extremely Good
Replies: 32
Views: 7139

I have an Rodagon D 120 f5.6 APO ( optimized at 1:1) Hello Sebastian, I previously had a copy of this lens. The Apo-Rodagon D 120mm f/5.6 is optimized for duplication at a 2:1 ration when used in the forward orientation, and at 1:2 when reversed. The lens would perform best as a taking lens at 1:2 ...
by dmillard
Thu Dec 20, 2018 4:50 pm
Forum: Equipment Discussions
Topic: Tube lens tests for MFT and FF
Replies: 31
Views: 13320

A Nikon 105mm f2.8 was unusable because of extreme vignetting, but the 135 f4.5 was quite good, as you noted. It produced about 7.2X measured with the 10X Nikon objective, and lost less peripherally than with the Mitty Leonard Just curious about the 135mm f/4.5, were you referring to the Nikon 135m...
by dmillard
Wed Nov 28, 2018 12:10 pm
Forum: Equipment Discussions
Topic: tube lens comparison
Replies: 17
Views: 5720

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: 5720

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: 13320

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: 4242

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: 11379

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: 2336

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: 1292

Very nice!
by dmillard
Sat Oct 13, 2018 12:46 pm
Forum: Equipment Discussions
Topic: Lee diffusers?
Replies: 14
Views: 2336

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...