Search found 57 matches

by Duke
Fri Mar 05, 2021 1:02 pm
Forum: Equipment Discussions
Topic: Olympus BH2 BHS LED Lighting
Replies: 14
Views: 354

Re: Olympus BH2 LED Lighting

viktor j nilsson wrote:
Fri Mar 05, 2021 12:28 pm
Those variable ND filters are just two polarizers, one of which can rotate. So it does the exact same thing as the two polarizers you used.
They are circular polarizers back-to-back to be exact, not linear. I've got 2 of 30mm for epi, and 2 37mm for condenser.
by Duke
Fri Mar 05, 2021 10:15 am
Forum: Equipment Discussions
Topic: Olympus BH2 BHS LED Lighting
Replies: 14
Views: 354

Re: Olympus BH2 LED Lighting

On my LED-modified microscopes I've used Adjustable ND Neutral Density ND2 to ND400 filter.
These come in various sizes, so can be easily fitted to almost any filter holder.
by Duke
Fri Mar 05, 2021 1:14 am
Forum: Equipment Discussions
Topic: Olympus U TLU tube lens vs SWTR-2 Superwide Head
Replies: 9
Views: 205

Re: Olympus U TLU tube lens vs SWTR-2 Superwide Head

The infinity optiphot head I have isn't technically ultra wide... How come it's not UW? Is binocular part design limits FOV or does it have 23mm eyepiece sockets? I've seen heads that look identical to LV-TI of mine, but with different eyepiece sockets, is yours one of those? Thought that that mayb...
by Duke
Fri Mar 05, 2021 12:27 am
Forum: Equipment Discussions
Topic: Olympus U TLU tube lens vs SWTR-2 Superwide Head
Replies: 9
Views: 205

Re: Olympus U TLU tube lens vs SWTR-2 Superwide Head

Scarodactyl, thx for the test.
Do you still have Nikon CFI-UW trinocular (Optiphot 150/200/300) at your disposal?
I believe it has the same MXA20696 "CFI60-2,CFI60,CF&IC compatible" f=200mm UW tubelens, as used in newer Eclipse heads.
Can you run a test between Nikon CFI-UW and Olympus SWTR?
by Duke
Mon Mar 01, 2021 1:55 am
Forum: Image Hosting Procedures
Topic: Image hosting procedures: the short story
Replies: 26
Views: 11110

Re: Image hosting procedures: the short story

Hi, Rik.
Is there a way to overlay url link for original uncompressed image onto attachment? Can't get it to work with php TAGs.
Clickable attachments would be much more convenient.
Thx.
by Duke
Sat Feb 27, 2021 12:37 am
Forum: Photography Through the Microscope
Topic: Birefringence Terminology
Replies: 11
Views: 265

Re: Birefringence Terminology

Sorry if my answer was a bit confusing, at first I was quickly browsing through the topic from my phone, and didn't read closely enough, I've read 'tissue' end 'biogenic', but missed the part 'rose', indicating that this topic is about COM crystals, observed in the thin sections of the plants. Anima...
by Duke
Fri Feb 26, 2021 4:16 am
Forum: Photography Through the Microscope
Topic: Birefringence Terminology
Replies: 11
Views: 265

Re: Birefringence Terminology

I've had some experience in study of kidney stone. I've done XRD, SEM -EDS -EBSD & optical microscopy study of one sample I've received, mainly from "scientific curiosity". Since I'm not qualified in medicine (other than 1 eyar course of biochemistry in the Uni, my specialty is chemical analysis) to...
by Duke
Thu Feb 25, 2021 12:10 pm
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 32
Views: 692

Re: Nikon CFN Fluor / Planapo 100 160/0.17

No offense but it's kind of silly to use a compensating objective without compensating optics--definitely not optimal. Giving neo splans a bad rap because of CA with direct projection is a bit like complaining an objective doesn't focus after removing its back element. I said there was no projectiv...
by Duke
Thu Feb 25, 2021 10:39 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 32
Views: 692

Re: Nikon CFN Fluor / Planapo 100 160/0.17

Interesting! But I'm a little confused. You take these photos with the matching projection eyepiece? Wouldn't you then expect to observe close to zero LCA? I would have guessed that you would use direct projection to measure each objective's LCA? Or do you use a nearly neutral eyepiece like the Nik...
by Duke
Wed Feb 24, 2021 11:07 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 32
Views: 692

Re: Nikon CFN Fluor / Planapo 100 160/0.17

Interesting to hear about the Olympus/Lomo match! I've never seen any data on the LCA of Olympus SB objectives. Where did you find this information? Do you know how similar the SB and LB objectives are to each other? They say that FK and NFK eyepieces aren't interchangeable. But I've briefly tried ...
by Duke
Wed Feb 24, 2021 10:13 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 32
Views: 692

Re: Nikon CFN Fluor / Planapo 100 160/0.17

Oddly enough, I am moving to the Olympus short-barrel PlanApos. I've come the opposite way :), well, almost. Old JIS Olympus Plan objectives was the first "imported" objectives for me (eastern bloc LOMO/Zeiss/PZO/Meopta etc. doesn't count), and I did like them. Some photos using LOMO MFN-11 trinocu...
by Duke
Wed Feb 24, 2021 5:11 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 32
Views: 692

Re: Nikon CFN Fluor / Planapo 100 160/0.17

I have CFN Plan Apo 100x 1.40 in my collection, it's not really that great even in terms of resolution in most circumstances. With such high aperture and small working distance, it is very sensitive to environment and sample itself, it would outperform Fluor only in ideal conditions, fragile thing, ...
by Duke
Tue Feb 23, 2021 11:02 am
Forum: Photography Through the Microscope
Topic: Embossed escutcheons on revenue stamps from the 18th and 19th Century
Replies: 33
Views: 1878

Re: Embossed escutcheons on revenue stamps from the 18th and 19th Century

Interestingly, I found out, that (at least for me), concave/convex uncertainty collapses for all photos, if I move sight from the bottom upwards the image, instead of natural up to down. I bet this effect comes from the circumstance, that naturally for human perception, light falls from up (sky, cei...
by Duke
Thu Feb 18, 2021 10:26 am
Forum: Equipment Exchange
Topic: Olympus MSPlan 20x LWD
Replies: 2
Views: 274

Re: Olympus MSPlan 20x LWD

MS_plan.jpg
MS PLAN LWD 20x has only 7 mm of working distance, not 11.
MS PLAN ULWD 20x has 11mm, but it's an entirely different objective.
by Duke
Thu Feb 11, 2021 2:30 am
Forum: Equipment Discussions
Topic: PZO MPI-3 vs MPI-5 objective compatibility
Replies: 3
Views: 347

Re: PZO MPI-3 vs MPI-5 objective compatibility

Have you tried LOMO short 160TL apo objectives with your MPI-5 set? I have many of those. I did, but this was a long time (~decade) ago, and if recall correctly, most of them, except APO 60x/0,7-1.0 and APO 60x/1.4, worked at the same level as original PZO. I never tried water-immersion, but I imag...