Search found 93 matches
- Fri Jan 20, 2023 3:15 pm
- Forum: Equipment Discussions
- Topic: Olympus Projection Eyepieces turn apos into achros (not clickbait)
- Replies: 25
- Views: 2384
Re: Olympus Projection Eyepieces turn apos into achros (not clickbait)
Viktor, excellent succinct test! Purchase justified I guess :-) There actually exists Nikon literature admitting the limitation in eyepiece design even in the CF era. Even admitting the shortcoming in eyepieces, they stay steadfast with their objective/tube lens corrections. FDAE27FC-79C6-4A77-A4D1-...
- Fri Jan 20, 2023 12:51 am
- Forum: Equipment Discussions
- Topic: Olympus Projection Eyepieces turn apos into achros (not clickbait)
- Replies: 25
- Views: 2384
Re: Olympus Projection Eyepieces turn apos into achros (not clickbait)
How do they look when mag is normalized? I did digitally zoom in. The XApo is the clear winner but the SApo is not any worse. There are faint hints of green LoCA. Such targets are challenging anyway, the CA surely will not present itself with normal imaging. I meant, how would they look if the appa...
- Fri Jan 20, 2023 12:43 am
- Forum: Equipment Discussions
- Topic: BFP1 latch on the Olympus DIC slider(s)
- Replies: 6
- Views: 896
Re: BFP1 latch on the Olympus DIC slider(s)
How does the interference fringe look like in the BFP with either slider position?
- Tue Jan 17, 2023 9:55 pm
- Forum: Equipment Discussions
- Topic: Olympus Projection Eyepieces turn apos into achros (not clickbait)
- Replies: 25
- Views: 2384
Re: Olympus Projection Eyepieces turn apos into achros (not clickbait)
How do they look when mag is normalized?
- Sat May 28, 2022 7:34 pm
- Forum: Equipment Discussions
- Topic: Article: Examining a "decentered" objective
- Replies: 8
- Views: 1188
Re: Article: Examining a "decentered" objective
Perhaps the adaptive optics path like Hubble? just kidding. There's a guy certified to do third party objective repairs for Nikon, not sure if he does Oly.. (wait, I think it's no longer Olympus, Evident Life Science... whatever.), but I see him doing insane repairs on about everything. https://twit...
- Thu Apr 28, 2022 4:49 pm
- Forum: Equipment Exchange
- Topic: Looking for an Olympus DPlan Apo 40x 0.85NA UV or Olympus DPlan 40x 1.00NA Oil
- Replies: 1
- Views: 598
- Fri Sep 10, 2021 3:14 pm
- Forum: Equipment Discussions
- Topic: 20x ELWD for Nikon E200 for reflected light?
- Replies: 9
- Views: 3069
Re: 20x ELWD for Nikon E200 for reflected light?
The TU plan ELWD 20x is much better at CA correction than it's LU counterpart probably due to it's use of a phase fresnel element. I'd recommend getting a TU if it's not price prohibitive. FYI, though both will work on a E200, the E200 head is only rated for a field number of 22mm.
Cheers,
John
Cheers,
John
- Sat Jan 30, 2021 4:07 pm
- Forum: Equipment Discussions
- Topic: Nikon MM objective object-sensor distance?
- Replies: 4
- Views: 2340
Re: Nikon MM objective object-sensor distance?
Parfocal distance for the MM series is always 126mm.
Cheers,
John
Cheers,
John
- Sat Jan 23, 2021 9:16 am
- Forum: Equipment Discussions
- Topic: What the @&$% objective get
- Replies: 15
- Views: 4377
Re: What the @&$% objective get
Yup, you get the Sweaty Palm Syndrome handling these :-)
Nice demonstration of NA diff. Is that a ronchi grating??
Nice demonstration of NA diff. Is that a ronchi grating??
- Fri Jan 22, 2021 6:05 pm
- Forum: Equipment Discussions
- Topic: What the @&$% objective get
- Replies: 15
- Views: 4377
Re: What the @&$% objective get
Lol, I’m sure you’ve seen the extreme spectrum of damaged objectives. The right one was NIB, the left with slight usage. I guess I was lucky with these:-)
- Fri Jan 22, 2021 5:08 pm
- Forum: Equipment Discussions
- Topic: What the @&$% objective get
- Replies: 15
- Views: 4377
Re: What the @&$% objective get
Great find! I wasn't aware of that label before.
btw, are these HR objectives reaching some kind of industry-wide end of life replacements? They're much more "affordable" than they used to be in numbers and price...
well, I only needed one...but two is better!
Cheers,
John
btw, are these HR objectives reaching some kind of industry-wide end of life replacements? They're much more "affordable" than they used to be in numbers and price...
well, I only needed one...but two is better!
Cheers,
John
- Sat Jan 16, 2021 10:32 pm
- Forum: Equipment Discussions
- Topic: Can someone tell me the difference between these two Nikon apos?
- Replies: 14
- Views: 3923
Re: Can someone tell me the difference between these two Nikon apos?
That silver PA20x is a CF series objective in production from 1976 to 1985. Pretty old, but good objective nonetheless. The black PA20x is a very recent finite objective made for a discrete slide scanner around 2013. It wasn't sold publicly and is rare. Excellent properties, but it lacks the spring ...
- Tue Oct 27, 2020 7:26 pm
- Forum: Equipment Discussions
- Topic: Please help me identify this Olympus OEM 60x objective
- Replies: 8
- Views: 2974
Re: Please help me identify this Olympus OEM 60x objective
No, "the outer shell".
The innards are probably Olympus.
I'm suggesting you got a poorly done Frankenobjektiv.
The outer shell of your lens is probably a lathed down shell of those Nikon OEM Illumina PA20x's.
The innards are probably Olympus.
I'm suggesting you got a poorly done Frankenobjektiv.
The outer shell of your lens is probably a lathed down shell of those Nikon OEM Illumina PA20x's.
- Tue Oct 27, 2020 6:36 pm
- Forum: Equipment Discussions
- Topic: Please help me identify this Olympus OEM 60x objective
- Replies: 8
- Views: 2974
Re: Please help me identify this Olympus OEM 60x objective
Perhaps its only me... but that outer shell on that "olympus" objective looks suspiciously Nikon... (Plus, you bought that for 5.7k USD??? My honest opinion, is you've been scammed. Who on the earth would wrap tin foil inside an objective to fit the outer shell?? That small screw on the case doesn't...
- Sat Oct 24, 2020 3:52 pm
- Forum: Equipment Discussions
- Topic: 10x Objectives: UPlanSApo 10x VS UPlanFL N 10x Ph1
- Replies: 8
- Views: 3023
Re: 10x Objective with delamination testing
With regards to the 100x, I can't get a nice view with adequate illumination due to what appears to be an internal aperture that blocks out the transmitted light. That's why you oil oil immersion objectives! It's impossible to introduce light into an oil immersion objective at an greater angle than...