Search found 5348 matches

by Pau
Mon Apr 15, 2024 8:09 am
Forum: Photography Through the Microscope
Topic: Micro double terminated quartz crystal
Replies: 5
Views: 219

Re: Micro double terminated quartz crystal

Very good image and nice comparison :D
by Pau
Wed Apr 10, 2024 11:22 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Methods to evaluate performance of a focus rail
Replies: 10
Views: 845

Re: Methods to evaluate performance of a focus rail

There are also a few high power microscopes that have a single knob that provides both coarse and fine focus depending on how you turn it. I have one of those, for which fine focus moves only a total of 0.3 mm in 1/2 turn, after which continuing to turn the knob gives coarse focus. Reversing the di...
by Pau
Wed Apr 10, 2024 7:32 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Methods to evaluate performance of a focus rail
Replies: 10
Views: 845

Re: Methods to evaluate performance of a focus rail

Hello rjlittlefield. Fascinating and complex matter; for me because I'm just a simple artist, but with an insatiable curiosity about the mechanics of things. I have an old Nikon SMZ-1 stereo microscope that I have been cleaning and restoring, with my limited knowledge. It's functional. It allows me...
by Pau
Sat Apr 06, 2024 10:43 am
Forum: Equipment Discussions
Topic: Question about Optiphot and infinity corrected objectives
Replies: 9
Views: 300

Re: Question about Optiphot and infinity corrected objectives

I ignore which infinite heads could mount on the Optiphot (the trick with a epiilluminator seems good) but about the infinite objectives you can use Olympus UIS or UIS2 or Nikon EPI CF infinites with RMS thread, or also could mount Nikon CFI60 with a M25 to RMS adapter if your in your stand the stag...
by Pau
Sat Apr 06, 2024 5:11 am
Forum: Equipment Discussions
Topic: Efficient diffuse macro lighting for SWD objectives
Replies: 13
Views: 412

Re: Efficient diffuse macro lighting for SWD objectives

I said "related" because, if I understand it well, the Lieberkühn's is just a reflector surrounding the lens* while yours is a double reflector, playing the conical objective tip an important role for illuminating the white diffusing reflector, am I right? * and would be of little utility with very ...
by Pau
Fri Apr 05, 2024 11:09 am
Forum: Equipment Discussions
Topic: Bellows suggestions?
Replies: 43
Views: 2849

Re: Bellows suggestions?

They are cheap for some reasons. "E" means "economy", I think. They are low end objectives mainly for student grade microscopes, achromats, non plan corrected and likely with not so big image circle although sometimes you can find great surprises "hidden gems" The 10X will be useful within its limit...
by Pau
Wed Apr 03, 2024 10:28 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: My lawn is loving the rain
Replies: 1
Views: 131

Re: My lawn is loving the rain

The stereo at 4K resolution is really awesome.
by Pau
Fri Mar 29, 2024 9:34 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: What camera adapter for trinoclear microscope
Replies: 13
Views: 464

Re: What camera adapter for trinoclear microscope

Hi Peter, you're welcome! So, my conclusion is that I could try the 0.5x relay lens in stead of the 0.35x. Do you agree? If yes, how to order a lens like that? Just “relay lens, 0.5x”?
Last question: will the light output be less than using the 0,35x lens? That might be a disadvantage.

 I think tha...
by Pau
Thu Mar 28, 2024 12:52 pm
Forum: Equipment Discussions
Topic: Lens recomendation for film reproduction
Replies: 69
Views: 1702

Re: Lens recomendation for film reproduction

I see the 1709a (without bellows) clearly much better! Take a look at them at 200%
by Pau
Thu Mar 28, 2024 9:19 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Zerene and hand-held focus stacking "manually"
Replies: 3
Views: 321

Re: Zerene and hand-held focus stacking "manually"

clausgiloi wrote:
Thu Mar 28, 2024 8:53 am
...I can add some examples once I figure out how to attach photos :-/
The procedure is described here:
viewtopic.php?f=20&t=41917
by Pau
Wed Mar 27, 2024 12:32 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: What camera adapter for trinoclear microscope
Replies: 13
Views: 464

Re: What camera adapter for trinoclear microscope

There is some thing in the microscope port or into the 0.35X adapter that is vignetting the image. More questions: 1. (again) Is the round image field as seen through the eyepieces bigger, similar or smaller than the camera round image field as shown? Observing and imaging a ruler is very useful for...
by Pau
Wed Mar 27, 2024 12:03 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Fossil diatoms in their natural habitat...
Replies: 2
Views: 158

Re: Fossil diatoms in their natural habitat...

...in their natural habitat... :lol: :lol: =D> Although they have been extracted, their habitat is the diatomite stratum Very promising raw material Very interesting! This is definitely a case where I needed to see the full resolution image to make sense of what I'm seeing. I can't agree more
by Pau
Mon Mar 25, 2024 11:23 am
Forum: Equipment Exchange
Topic: Optiphot Bertrand head
Replies: 2
Views: 166

Re: Optiphot Bertrand head

Just by curiosity, is it a head with built-in Bertrand lens?
by Pau
Mon Mar 25, 2024 2:50 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: What camera adapter for trinoclear microscope
Replies: 13
Views: 464

Re: What camera adapter for trinoclear microscope

The question now is which adapter I should use from camera to microscope to obtain the same field of view and focus through the camera as with direct view. Is the image too big or too small when compared with the eyepieces field of view? Please clarify this point Because the sensor is rectangular a...