Search found 4746 matches

by Pau
Sat Dec 26, 2020 2:14 am
Forum: Equipment Discussions
Topic: Afocal Leica SM-LUX Project
Replies: 19
Views: 2242

Re: Afocal Leica SM-LUX Project

Despite being a cool idea I don't find the drawer polarizer holder very convenient because it lacks a fundamental feature: allowing the polarizer to be easily and precisely rotatable. It doesn't need to be placed just under the condenser, a polarizer just over the illuminated field is easier to work...
by Pau
Fri Dec 25, 2020 4:24 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Dragonfly Sexual Dimorphism and More
Replies: 2
Views: 733

Re: Dragonfly Sexual Dimorphism and More

Great portraits and interesting info, Steve
by Pau
Thu Dec 24, 2020 9:09 am
Forum: Beginners Micro
Topic: Leitz eyepiece question for afocal camera setup
Replies: 4
Views: 402

Re: Leitz eyepiece question for afocal camera setup

Hi S_Reynolds, Welcome aboard! The pictured microscope is very old (and beautiful :D ). I'm not sure if it accomplishes with later standards about tube length, objective and eyepiece optical corrections, even eyepiece tube width and objective mount... The tube seems of variable length, so 170 or 160...
by Pau
Tue Dec 22, 2020 11:02 am
Forum: Equipment Discussions
Topic: Afocal Leica SM-LUX Project
Replies: 19
Views: 2242

Re: Afocal Leica SM-LUX Project

It looks like a very specific size of filter will need to sit under the head as the instructions seem to require the assembly head to be fully rotated down to locate the alignment pin. I feel the head then must seat into the polarizer instead of the assembly head, might that be the case? Maybe if y...
by Pau
Mon Dec 21, 2020 2:28 am
Forum: Equipment Discussions
Topic: Afocal Leica SM-LUX Project
Replies: 19
Views: 2242

Re: Afocal Leica SM-LUX Project

Here you can download the manual:
www.science-info.net/docs/leitz/Leitz-S ... ctions.pdf
It explains the focus procedure and also the location of the polarizer and analyzer. It happens that I have both (bought for another use not being aware of the original intended model)
by Pau
Sun Dec 20, 2020 2:17 am
Forum: Equipment Discussions
Topic: Afocal Leica SM-LUX Project
Replies: 19
Views: 2242

Re: Afocal Leica SM-LUX Project

Currently there are no 170mm 519739 eyepieces on eBay but there is a 170mm adapter. Hypothetically, could I not just REMOVE 10mm from the top of the 170mm adapter, and use 160mm eyepieces and 170mm with a spacer/collar? In principle it can be done, the mechanical tube difference is 8mm. First be su...
by Pau
Fri Dec 18, 2020 5:29 am
Forum: Equipment Discussions
Topic: Tube Lens for Zeiss "Neofluar" Objective
Replies: 1
Views: 981

Re: Tube Lens for Zeiss "Neofluar" Objective

I can't respond to the first questions
...does Zeiss require an eyepiece to fix aberrations?
Not for infinite Axio series because the complementary corrections are done by the tube lens (and yes for older 160 finite series)
by Pau
Thu Dec 17, 2020 12:04 pm
Forum: Equipment Discussions
Topic: Camera Options for Zeiss Axioskop 20
Replies: 1
Views: 984

Re: Camera Options for Zeiss Axioskop 20

Hi Phroxian, welcome aboard! A dedicated camera like the Amscope you linked would be easier to work with (no vibrations, measurement built into the camera software...) although I haven't experience with this kind of cameras (my short experience with older ones was deceiving, although this one is muc...
by Pau
Mon Dec 14, 2020 3:10 am
Forum: Photography Through the Microscope
Topic: Tardígrado.
Replies: 3
Views: 772

Re: Tardígrado.

This is Spanish, Tardigrade in English (Google translator does it well)
by Pau
Sun Dec 13, 2020 10:18 am
Forum: Equipment Discussions
Topic: ...one source for a ring...
Replies: 20
Views: 2920

Re: ...one source for a ring...

A second hand halogen light source is the easiest way, like Scarodactyl suggests. This is what I use. It will provide lots of light but also noise, vibrations and heat, of course. You can also profit your nice fiber optic ring with a powerful LED placed very close to the fiber optic tip, this has be...
by Pau
Fri Dec 11, 2020 12:40 pm
Forum: Photography Through the Microscope
Topic: Beta-Alanine + L-Glutamine
Replies: 10
Views: 1368

Re: Beta-Alanine + L-Glutamine

Well, vodka has some other uses :lol: :wink:
by Pau
Fri Dec 11, 2020 12:36 pm
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 4854

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

Thanks for showing your tests! Duke, Your tests show very bad performance at the corners but also at the borders, what tube lens did you use? I'm not telling that it had performed badly as your 20X behaves excellently, but about the focal length. Your camera sensor seems a bit larger than mine but, ...
by Pau
Fri Dec 11, 2020 4:00 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Windows of Papilio ulysses wing scale
Replies: 17
Views: 3474

Re: Windows of Papilio ulysses wing scale

Chris, thank you!

This was the idea of my request, as I wanted to see if, despite being much less crisp, the 100% crop was showing more detail than the reduced full frame. It seems, at least with this subject, that the showed resolution increase is small.
by Pau
Thu Dec 10, 2020 5:12 am
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 4854

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

... While I don't have the UPlanFLN 4x/0.13, I have a UPlanApo 4x/0.16, a UMPlanFL 10x/0.30, and an LMPlanFl 20x/0.40. I'll do a test of these this weekend to examine their coverage more critically, and report back. Hi David, It would be very nice to see your tests (and in particular the LMPlanFl 2...
by Pau
Thu Dec 10, 2020 4:59 am
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 4854

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

I've got this objective and it performs well at the center, but very badly at the corners. There is excessive amount of coma and astigmatism... Even worse than Nikon CF PLAN 5x 0.13, which has less geometric aberrations, but far worse LCA. Hi Duke, What camera sensor size do you use? Is the corner ...