Search found 23 matches

by mrlowndes
Wed Feb 10, 2021 9:36 am
Forum: Equipment Discussions
Topic: Cleanest microscope slides for D/F microscopy
Replies: 10
Views: 4593

Re: Cleanest microscope slides for D/F microscopy

micro_pix wrote:
Tue Feb 09, 2021 3:13 pm
You can get quality precision coverslips and I think that they make a difference for high magnification and darkfield photography. Thorlabs sell quality slides and precision coverslips but they aren’t cheap.

Dave
Great! Thanks, I'll look into those
by mrlowndes
Wed Feb 10, 2021 9:35 am
Forum: Equipment Discussions
Topic: Cleanest microscope slides for D/F microscopy
Replies: 10
Views: 4593

Re: Cleanest microscope slides for D/F microscopy

best technique for cleaning microscope slides for spotless Dark Field imaging? Hi, For cleaning at home or in a lab? Some techniques are too dangerous to do without the necessary knowledge and PPE, but there are alternatives for doing it at home. Basically, mild alkali or acid + ultrasonic bath str...
by mrlowndes
Tue Feb 09, 2021 12:11 pm
Forum: Equipment Discussions
Topic: Anyone had any experience with LM Microscope camera adapters?
Replies: 3
Views: 1295

Re: Anyone had any experience with LM Microscope camera adapters?

It seems that your objectives are are Nikon CF type, are they? If so they are "fully corrected" -this just means that they don't need chromatic aberration corrections of their primary image done at the eyepiece (or tube lens in infinite systems)- not that they have the best correction. If you use C...
by mrlowndes
Tue Feb 09, 2021 10:28 am
Forum: Equipment Discussions
Topic: Anyone had any experience with LM Microscope camera adapters?
Replies: 3
Views: 1295

Anyone had any experience with LM Microscope camera adapters?

Photo adapters and tubes - Anyone have experience with LM Microscope adapters? https://www.lmscope.com/en/produkte_en.html Their full frame adapter seems to put the camera much closer to the trinocular head than mine, but it's not super clear from looking at their website. If I can get the camera cl...
by mrlowndes
Fri Feb 05, 2021 2:49 pm
Forum: Equipment Discussions
Topic: Even DF illumination for 4x objective
Replies: 17
Views: 4242

Re: Even DF illumination for 4x objective

There is extra lens (do not remember part #), which has to placed into the condenser's light entrance. I had the same problem with low magnification IMG_2130-web685x950U100-G14.jpg Thanks - would be great to know what this is called so I can search for it Aha! C-CEL expander lens oh no that's not it
by mrlowndes
Fri Feb 05, 2021 2:31 pm
Forum: Equipment Discussions
Topic: Even DF illumination for 4x objective
Replies: 17
Views: 4242

Re: Even DF illumination for 4x objective

Anyone got any advice on how to get great DF on a 4X objective that evenly illuminates the whole field? I have a Nikon Optiphot, but I have heard that some Olympus condensers are easy to adapt to the Nikon dovetail for the substage condenser, and that the olympus condensers have a filter tray for a...
by mrlowndes
Fri Feb 05, 2021 2:28 pm
Forum: Equipment Discussions
Topic: Even DF illumination for 4x objective
Replies: 17
Views: 4242

Re: Even DF illumination for 4x objective

Anyone got any advice on how to get great DF on a 4X objective that evenly illuminates the whole field? I have a Nikon Optiphot, but I have heard that some Olympus condensers are easy to adapt to the Nikon dovetail for the substage condenser, and that the olympus condensers have a filter tray for a...
by mrlowndes
Fri Feb 05, 2021 12:02 pm
Forum: Equipment Discussions
Topic: Even DF illumination for 4x objective
Replies: 17
Views: 4242

Re: Even DF illumination for 4x objective

I have a PC turret condenser, but it does not cover 4X Can you remove the condenser upper lens? With my Zeiss condensers it is needed anyway for 4X and less. Some models allow to switch it out and others to unscrew it. Abbe condensers usually cover the 4X with the upper lens although with some mode...
by mrlowndes
Fri Feb 05, 2021 11:42 am
Forum: Equipment Discussions
Topic: Even DF illumination for 4x objective
Replies: 17
Views: 4242

Re: Even DF illumination for 4x objective

DF with a 4X usually is easy, you don't need a dedicated DF condenser if you can place a stop at the right position in an ordinary BF condenser of using a Phase Contrast ring for higher NA objectives as Alan does. Dedicated DF condensers are designed for high NA objectives where DF stops on BF cond...
by mrlowndes
Fri Feb 05, 2021 11:34 am
Forum: Equipment Discussions
Topic: Even DF illumination for 4x objective
Replies: 17
Views: 4242

Re: Even DF illumination for 4x objective

The Olympus condenser dovetail is slightly bigger than the Nikon one. It is definitely possible to use Nikon condensers on Olympus microscopes; I used a Nikon dark-ground condenser on my BH-2 until I found a cheap Olympus one. It may not be possible to use Olympus condensers on Nikon microscopes, I...
by mrlowndes
Thu Feb 04, 2021 9:02 pm
Forum: Equipment Discussions
Topic: Even DF illumination for 4x objective
Replies: 17
Views: 4242

Even DF illumination for 4x objective

Anyone got any advice on how to get great DF on a 4X objective that evenly illuminates the whole field? I have a Nikon Optiphot, but I have heard that some Olympus condensers are easy to adapt to the Nikon dovetail for the substage condenser, and that the olympus condensers have a filter tray for a ...
by mrlowndes
Tue Feb 02, 2021 3:54 pm
Forum: Equipment Exchange
Topic: CFN PlanApo 40X
Replies: 0
Views: 2154

CFN PlanApo 40X

Excellent condition. Make me an offer
by mrlowndes
Sun Jan 24, 2021 6:36 pm
Forum: Equipment Discussions
Topic: Can someone tell me the difference between these two Nikon apos?
Replies: 14
Views: 3922

Re: Can someone tell me the difference between these two Nikon apos?

You might find that you get better results anyway even with necessary cropping, though my copy of the 2.5x pl eyepiece may have been particularly bad. Some of the heads (particularly the UW head) also establish an area of infinity focus within themselves, so you could actually replace the ~105mm tu...
by mrlowndes
Sun Jan 24, 2021 3:38 pm
Forum: Equipment Discussions
Topic: Can someone tell me the difference between these two Nikon apos?
Replies: 14
Views: 3922

Re: Can someone tell me the difference between these two Nikon apos?

Higher end nikon objectives from the finite era needed to be able to cover ultra widefield eyepieces with a field number of 26.5mm, so they tend to cover aps-c pretty well. A 2.5x eyepiece by contrast will have a field number around 20mm (someone probably has the right number on hand) and in my own...
by mrlowndes
Mon Jan 18, 2021 10:37 pm
Forum: Equipment Discussions
Topic: Cleanest microscope slides for D/F microscopy
Replies: 10
Views: 4593

Cleanest microscope slides for D/F microscopy

Hello

I'm looking for the cleanest D/F images possible and am wondering if anyone has any recommendations for the cleanest brand of microscope slides out of the box and...

best technique for cleaning microscope slides for spotless Dark Field imaging?

Thanks