Search found 112 matches

by Rorschach
Thu May 28, 2020 1:06 am
Forum: Equipment Discussions
Topic: Thoughts on Pentax KP for microscopy
Replies: 10
Views: 1046

Thank you all. I've placed an order for Pentax KP. Not quite sure why wouldn't image stabilization work, but I've decided to do vibration isolated table anyways, found some awesome looking magnetic suspension feet on Aliexpress, putting it on countertop leftovers I've got. I don't have a KP so can'...
by Rorschach
Wed May 27, 2020 1:17 pm
Forum: Equipment Discussions
Topic: Thoughts on Pentax KP for microscopy
Replies: 10
Views: 1046

Re: Thoughts on Pentax KP for microscopy

- Pixel shift super resolution (to milk out all of sweet details from my λ-series Nikon PlanApo objectives 2x/0.10, 4x/0.20, 10x/0.45, 20x/0.75, 40x/0.95, 60x/1.40) ... - In-camera image stabilization (to minimize general vibration) in camera stabilisation only works for "normal" lenses not for mic...
by Rorschach
Wed May 27, 2020 10:22 am
Forum: Equipment Discussions
Topic: Thoughts on Pentax KP for microscopy
Replies: 10
Views: 1046

In-camera image stabilization (to minimize general vibration) If you are just interested in macro, this is not important. It needs to be turned off when stacking on most models. It needs to be turned off for any tripod work also. But it is great for handheld photography. All of your old lenses from...
by Rorschach
Wed May 27, 2020 10:00 am
Forum: Equipment Discussions
Topic: Thoughts on Pentax KP for microscopy
Replies: 10
Views: 1046

Re: Thoughts on Pentax KP for microscopy

Greetings to all enthusiasts of macro- and micro- photography. I'm looking for a new camera to supersede my current Nikon d5300 on my universal microscope based on Nikon Eclipse series components (trinocular head, objectives, condenser). My initial requirements were: - APS-C BSI-CMOS sensor of at l...
by Rorschach
Thu May 14, 2020 6:01 am
Forum: Equipment Discussions
Topic: Infinity objectives, Orthoplan
Replies: 10
Views: 1084

Hi Ichty, Ok, in that case I won't touch the tube lenses! :D I don't want to ruin these magnificent instruments. Wasn't aware of the consequences of removing or replacing a tube lens. I guess I'm mostly intrigued by the possibility to use various infinite lenses on Orthoplan - something that was not...
by Rorschach
Wed May 13, 2020 9:15 pm
Forum: Equipment Discussions
Topic: Infinity objectives, Orthoplan
Replies: 10
Views: 1084

OK, I understand. Then one more (potentially) useful bit of information: as far as I understand the literature, the ∞/0.8x nosepiece has a 200 mm tube lens (∞/1x is 250 mm). That's a bit more than Olympis UIS (180 mm) but the same as Nikon CFI60. Thanks Ichty! I need to find out what length tube le...
by Rorschach
Wed May 13, 2020 6:39 am
Forum: Equipment Discussions
Topic: Odd Leitz UV objective - any Leitz historical experts?
Replies: 6
Views: 1232

Since this is 160mm tube length, doesn't that preclude the possibility of being designed for the system mentioned in the paper you found? I may be wrong but I was under the impression that Leitz scopes of the 60ies were all 170mm (or, in the case of metallurgical scopes, infinity)? Back in the day, ...
by Rorschach
Wed May 13, 2020 6:08 am
Forum: Equipment Discussions
Topic: Infinity objectives, Orthoplan
Replies: 10
Views: 1084

Re: Infinity objectives, Orthoplan

Of course, with the 0.8x nosepiece, one loses magnification but gains in field of view. The extra field only helps if the objectives are corrected for planarity wide enough, of course. Hi, Do you really need extra field of view? If you have a 1x nosepiece for transmitted light, you can get FN28 wit...
by Rorschach
Tue May 12, 2020 5:43 am
Forum: Equipment Discussions
Topic: Infinity objectives, Orthoplan
Replies: 10
Views: 1084

Re: Infinity objectives, Orthoplan

So I have an Orthoplan with an 0.8x infinity nosepiece that is intended for reflected light work. Why can't I use infinity transmitted light objectives on it, provided that I am using the appropriated condenser (and, obviously, transmitted light)? Have you tried it? I don't know the focal length of...
by Rorschach
Tue May 12, 2020 4:11 am
Forum: Equipment Discussions
Topic: Infinity objectives, Orthoplan
Replies: 10
Views: 1084

Infinity objectives, Orthoplan

This question may once more expose how little I know yet about matters related to compound microscopes. But I will ask it nevertheless. So I have an Orthoplan with an 0.8x infinity nosepiece that is intended for reflected light work. Why can't I use infinity transmitted light objectives on it, provi...
by Rorschach
Wed May 06, 2020 2:42 am
Forum: Equipment Discussions
Topic: Bausch + Lomb U.L.W.D. Lens question
Replies: 31
Views: 13008

This lens was probably for a Bausch and Lomb MicroZoom. . . I just found a reference that seems to confirm this, with the added wrinkle that at least some of specimens were badged as “Cambridge Instruments,” instead of Bausch and Lomb. (Was Cambridge Instruments a B&L nameplate, spinoff, or integra...
by Rorschach
Fri May 01, 2020 12:53 am
Forum: Equipment Discussions
Topic: Setup for specimens in water on a research vessel?
Replies: 12
Views: 2258

A photomacroscope might be a better option if the goal is primarily photography rather than inspection. Maybe even one without eyepieces like a Navitar system if high resolution isn't paramount vs versatility. These can also be had pretty affordably. That is true if the only target is photographing...
by Rorschach
Thu Apr 30, 2020 2:42 am
Forum: Equipment Discussions
Topic: Setup for specimens in water on a research vessel?
Replies: 12
Views: 2258

I would like to again emphasize the versatility of a quality stereo microscope. No other option comes close for that size range of specimens (and somewhat beyond that range). At one point I spent time on a research vessel at sea doing bottom invertebrate sampling. There are some ways around the prob...
by Rorschach
Wed Apr 29, 2020 8:39 am
Forum: Equipment Discussions
Topic: Setup for specimens in water on a research vessel?
Replies: 12
Views: 2258

The size range of your specimens is exactly the same as mine (benthic freshwater macroinvertebrates). By far the best tool for looking at them (and photographing) is a good stereo microscope.
by Rorschach
Sun Apr 19, 2020 1:12 am
Forum: Equipment Exchange
Topic: Found and bought: Leitz K4 condenser lens
Replies: 0
Views: 1528

Found and bought: Leitz K4 condenser lens

I would like to buy this auxiliary lens that is intended for Orthoplan condensers.

Edit: found two of these and no need for more!