Search found 219 matches

by viktor j nilsson
Tue Oct 27, 2020 8:45 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for Olympus Photomicro Adapter L
Replies: 10
Views: 114

Re: Looking for Olympus Photomicro Adapter L

Just to be clear, at least earlier model olympus infinity microscopes use exactly the same mounting hardware as the BH2 series. It's a wonderful bit of backwards/forwards compatibility. They may have changed it at some later point, but it worked that way on the BX40 I had for a bit. Wonderful compa...
by viktor j nilsson
Tue Oct 27, 2020 2:14 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for Olympus Photomicro Adapter L
Replies: 10
Views: 114

Re: Looking for Olympus Photomicro Adapter L

Are you sure you need the Photomicro Adapter L? I was under the impression that this was only for the finite era (i.e. BH and BH2) stands, not for the infinity scopes (CX/BX)? I may be wrong, though. I am only familiar with the finite microscopes.
by viktor j nilsson
Tue Oct 27, 2020 7:46 am
Forum: Illumination Techniques
Topic: Problems with flourescence picture on ZEISS Axiovert 25
Replies: 5
Views: 97

Re: Problems with flourescence picture on ZEISS Axiovert 25

interference filters (and the mirror of course) do have a limited shelf life even if securely wrapped and tucked away in the depth of a drawer. Several years, not decades. I am curious: what is the physical nature of the process of deterioration? What is the structure and composition of the mirror ...
by viktor j nilsson
Mon Oct 26, 2020 5:53 pm
Forum: Beginner's corner
Topic: Olympus Vanox
Replies: 8
Views: 176

Re: Olympus Vanox

Hope you can post them! It can be a little tricky to resize images, especially if you're on the phone. I sometimes post images on imgur.com and put the direct image paths inside [img] tags. Imgur has made it a little harder to find the direct link to the .jpg's, but some right clicking should reveal...
by viktor j nilsson
Mon Oct 26, 2020 8:16 am
Forum: Beginner's corner
Topic: Olympus Vanox
Replies: 8
Views: 176

Re: Olympus Vanox

What Vanox is it, the old mechanical AH or the more modern electronic AH2?
by viktor j nilsson
Sat Oct 24, 2020 11:08 pm
Forum: Specimens, samples and slides
Topic: Alternative mountants
Replies: 8
Views: 1147

Re: Alternative mountants

Hello. Ok, you won't believe it but it is true. Elmers glue is a good mounting medium. RI 1.46 Polyeurethane glycol (miralax) is a good mounting medium . Mix 2 daily doses with 1/4 cup warm water. Stir til completely dissolved. RI 1.46. Both will set in short order and be completely dry in 24 to 36...
by viktor j nilsson
Sat Oct 24, 2020 8:29 pm
Forum: Illumination Techniques
Topic: Stereo Microscope : Fluorescence Adapter
Replies: 59
Views: 13068

Re: Stereo Microscope : Fluorescence Adapter

I mentioned that as a response to Greg's question: 1. Why not mount a uv flashlight in the vertical position on the nose of the stereo scope so the light is directed downward and more light will be reflected into the objective? I may have misunderstood, but I thought Greg was thinking about mounting...
by viktor j nilsson
Sat Oct 24, 2020 7:59 pm
Forum: Illumination Techniques
Topic: Stereo Microscope : Fluorescence Adapter
Replies: 59
Views: 13068

Re: Stereo Microscope : Fluorescence Adapter

Charles Krebs has gotten good results with a Nichia Convoy S2+ flashlight aimed at the slide, and a 420nm emission filter.

http://www.photomacrography.net/forum/v ... hp?t=33123

Only likely to work with long work distance objectives, though.
by viktor j nilsson
Sat Oct 24, 2020 1:10 pm
Forum: My microscope
Topic: Hello from Oregon. Questions concerning use of extension tubes.
Replies: 15
Views: 240

Re: Hello from Oregon. Questions concerning use of extension tubes.

Also, the change in magnification depend on the focal length of the objective, so it will differ between your objectives.
by viktor j nilsson
Sat Oct 24, 2020 1:09 pm
Forum: My microscope
Topic: Hello from Oregon. Questions concerning use of extension tubes.
Replies: 15
Views: 240

Re: Hello from Oregon. Questions concerning use of extension tubes.

I would be less concerned with magnification, and more concerned about image quality. Here's an often cited figure: http://www.science-info.net/docs/etc/Tube-Length-na.gif I believe it's based on how spherical abstain increase with differences in tube length. With a 20mm difference in TL, you should...
by viktor j nilsson
Sat Oct 24, 2020 11:49 am
Forum: Microscopes and optics
Topic: Cleaning wave plates
Replies: 9
Views: 174

Re: Cleaning wave plates

Thanks for great input, all of you. Upon closer inspection, it does look like the wave plate is cemented together, so it makes a lot of sense that it would be mica sandwiched between optical glass. Removing the cover is not an option, the holder is solid metal. The wave plate is inserted into a thre...
by viktor j nilsson
Fri Oct 23, 2020 6:31 pm
Forum: Microscopes and optics
Topic: Cleaning wave plates
Replies: 9
Views: 174

Re: Cleaning wave plates

Thanks, Kirby! Are they really soft, these older mica/gypsum plates?
by viktor j nilsson
Fri Oct 23, 2020 5:01 pm
Forum: My microscope
Topic: The easiest microscope to tweak, modify
Replies: 28
Views: 483

Re: The easiest microscope to tweak, modify

Charles wrote:
Fri Oct 23, 2020 4:42 pm
viktor j nilsson wrote:
Fri Oct 23, 2020 4:22 pm
The OP did not mention price,
He said 800-900 euro.
Yes, in post #18, after a lengthy discussion.
by viktor j nilsson
Fri Oct 23, 2020 4:22 pm
Forum: My microscope
Topic: The easiest microscope to tweak, modify
Replies: 28
Views: 483

Re: The easiest microscope to tweak, modify

] You say budget is what matters in scope selection, yet you suggest a microscope which is way over his budget with very high shipping cost for such a large microscope on top of that. Go figure. All the Zeiss standards 14-WL have a very small footprint and all can utilize the 12V 100W illumination....
by viktor j nilsson
Fri Oct 23, 2020 11:41 am
Forum: Microscopes and optics
Topic: Cleaning wave plates
Replies: 9
Views: 174

Cleaning wave plates

Earlier this year I bought an Olympus Vanox AH. I mostly wanted it for its DIC capacity, but I was also happy to see that it came with a complete polarizing setup (rotating stage, pol condenser, pol intermediate tube, pol objectives, two wave plates). A full presentation of this microscope will be p...
by viktor j nilsson
Thu Oct 22, 2020 5:12 pm
Forum: Camera systems and imaging
Topic: Help needed to design adaptor for Mirrorless camera
Replies: 42
Views: 2816

Re: Help needed to design adaptor for Mirrorless camera

Are you using electronic shutter? My quick search on the XE2 suggest that it can operate both in mechanical shutter and electronic shutter mode. In the mechanical shutter mode the shutter has to close, open, close, open to take a picture, which can absolutely cause the vibration problems in your pic...
by viktor j nilsson
Thu Oct 22, 2020 1:42 pm
Forum: My microscope
Topic: The easiest microscope to tweak, modify
Replies: 28
Views: 483

Re: The easiest microscope to tweak, modify

Depends on where you are located. In Europe I'd say a Zeiss Standard.
by viktor j nilsson
Thu Oct 22, 2020 7:38 am
Forum: My microscope
Topic: A new microscope - your help will be appreciated
Replies: 13
Views: 889

Re: A new microscope - your help will be appreciated

If you are going to look at larger subjects and don't care about stereo, you can get a digital microscope and buy a nice stand for it at a small fraction of the cost. You won't need to buy separate camera. I beg to differ. Digital microscopes are a pretty lousy substitute for a stereo microscope IM...
by viktor j nilsson
Tue Oct 20, 2020 6:32 pm
Forum: Microscopes and optics
Topic: Stereozoom 7 zoom disassembly
Replies: 8
Views: 310

Re: Stereozoom 7 zoom disassembly

It was 1.3mm. Good news is I got it apart. Bad news is I wasn't able to fix the haziness. I also found out that the nylon gear on the zoom mechanism was beginning to crack (still works, though). The prisms looked clear, as did all the accessible lenses. I didn't want to disassemble the upper assembl...
by viktor j nilsson
Mon Oct 12, 2020 9:19 am
Forum: Pictures and Videos
Topic: Algal bloom under the microscope
Replies: 19
Views: 703

Re: Algal bloom under the microscope

I can ask some people at work, Håkan. I work at the aquatic ecology department in Lund, there are quite a few people there who work experimentally on algae. And these photos are some of the best I've seen. Thank you so much Victor! What a great place to work. You must have access to a lot of sample...
by viktor j nilsson
Thu Oct 08, 2020 2:51 pm
Forum: Pictures and Videos
Topic: Algal bloom under the microscope
Replies: 19
Views: 703

Re: Algal bloom under the microscope

I can ask some people at work, Håkan. I work at the aquatic ecology department in Lund, there are quite a few people there who work experimentally on algae.

And these photos are some of the best I've seen.
by viktor j nilsson
Fri Oct 02, 2020 6:02 pm
Forum: Microscopes and optics
Topic: Item Question
Replies: 3
Views: 230

Re: Item Question

MicroBob's answer is very likely correct, so I don't think you need a second opinion, you just need to test it.
by viktor j nilsson
Fri Oct 02, 2020 10:39 am
Forum: Microscopes and optics
Topic: Depth of field
Replies: 8
Views: 355

Re: Depth of field

Yep, that is an inescapable optical property.
You can read more about the relationship between NA and depth of field here:
https://www.microscopyu.com/microscopy- ... h-of-focus
by viktor j nilsson
Wed Sep 30, 2020 7:01 pm
Forum: Microscopes and optics
Topic: Stereozoom 7 zoom disassembly
Replies: 8
Views: 310

Re: Stereozoom 7 zoom disassembly

Mine's the older metal version, very similar to the Bausch and Lomb branded ones. I was actually surprised by how soft and supple the dust shields still were. I've found a local source for 1.3mm wrenches that I'll be able to pick up in a day or two.
by viktor j nilsson
Wed Sep 30, 2020 2:39 pm
Forum: Microscopes and optics
Topic: Stereozoom 7 zoom disassembly
Replies: 8
Views: 310

Re: Stereozoom 7 zoom disassembly

Thanks, apo. A 1.3mm hex wrench also seem to be what I need for loosening the helical focusing rings on the trinocular head of my Vanox AH as well, so I guess this is a good time to buy one. I would be surprised if they changed much more than the name from the Bausch and Lomb ones. A metric 1.3mm is...
by viktor j nilsson
Wed Sep 30, 2020 8:20 am
Forum: Microscopes and optics
Topic: Stereozoom 7 zoom disassembly
Replies: 8
Views: 310

Stereozoom 7 zoom disassembly

I have a Leica-branded Stereozoom 7. It works okay, but its optics have always been a little hazy, and I would like to open it up to see if I can clean it. I need to loosen set screw (21) on the schematic below to remove the zoom knob. Am I correct in assuming that it requires an imperial hex wrench...
by viktor j nilsson
Sat Sep 26, 2020 9:39 pm
Forum: Microscopes and optics
Topic: Nikon and Wild heads
Replies: 7
Views: 350

Re: Nikon and Wild heads

I just checked the binocular head dovetail on one of my wild m20's. Couldn't find my calipers, but it's very close to 40mm.
by viktor j nilsson
Sat Sep 19, 2020 6:52 am
Forum: Pictures and Videos
Topic: Marine nematode
Replies: 6
Views: 221

Re: Marine nematode

I usually pick up a small bit of seaweed with tweezers and tap it lightly on the slide before returning it to the sample jar. Best slides are those where 'by eye' it would seem that I did not transfer anything from the sample jar but water. This is really good advice which deserves to be repeated. ...
by viktor j nilsson
Tue Aug 25, 2020 10:24 pm
Forum: Microscopes and optics
Topic: Nikon Plan Apo Lambda 20x - ok??
Replies: 39
Views: 2042

Re: Nikon Plan Apo Lambda 20x - ok??

You won't get any extra charges when a seller ships with eBay's global shipping program - that $161 price includes $30 shipping and $31 import charges. eBay surely keep these pretty high to make a profit on shipping and import charges, but microscope items are often so much cheaper in the US that it...