Search found 92 matches

by Bryan
Tue Nov 13, 2018 4:13 pm
Forum: Identification help
Topic: Rotifer?
Replies: 3
Views: 1915

Re: Rotifer?

It is a rotifer, a bdelloid by the look of it. Under adverse conditions they form cysts - this protects them until circumstances improve. The lack of movement you mention was probably the beginning of this process. Some links: http://www.microbehunter.com/microscopy-forum/viewtopic.php?f=15&t=46 Th...
by Bryan
Tue Nov 13, 2018 4:00 am
Forum: Identification help
Topic: Rotifer?
Replies: 3
Views: 1915

Rotifer?

I was looking for tardigrades so I put some pond water in a container with some lichen and moss. I didn't find any tardigrades but I saw a few of these. I'm guessing rotifer but I have no idea. It wasn't moving at all, this was a long exposure, maybe it was dead. This was shot on expired Panatomic-X...
by Bryan
Mon Nov 12, 2018 5:08 pm
Forum: Off Topic
Topic: Flame Tests
Replies: 21
Views: 9099

Re: Flame Tests

I work in the hazardous waste cleanup industry, we used to test oil with what is called the Beilstein, or copper wire test. It's very similar to the test described in your link but it was commonly used to test for chlorinated compounds in oil like PCB's. If the oil was chlorinated it would emit a gr...
by Bryan
Sat Nov 10, 2018 1:49 am
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

MichaelG. wrote:Bryan,

You may find this useful:
http://www.geocities.ws/dushang2000/Mic ... hments.pdf

MichaelG.

I will edit this post if I find more.
Thanks Michael, that’s actually quite useful.
by Bryan
Fri Nov 09, 2018 9:57 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

so I can make contact prints When I was 15 I had b/w photography as a subject in school. I told my grandmother about it and about the enlarger that was used. She didn't want to hear about the enlarger, all that was needed was a box with a bulb, switch and milk glass on it. Okay - what I didn't know...
by Bryan
Fri Nov 09, 2018 6:16 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

Hi Bryan, thank you for posting your analog photography! These old microscope cameras were expensive and nicely made instruments but I really can't remember when I last saw an image made by them. I myself started digital photography late, it was 2007 and I bought a Pentax DSLR when 6 megapixels did...
by Bryan
Fri Nov 09, 2018 4:31 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

This is a test shot with my setup using film. This is the trailing edge of a mosquito wing at 450X magnification. Looks like feathers to me. The exposure was about 25 seconds. The film is expired Kodak Panatomic-X semi-stand developed in 1:100 R09 (Rodinal). I rated the film at an ISO of 25 since it...
by Bryan
Tue Nov 06, 2018 7:51 pm
Forum: Microscopes and optics
Topic: What is this?
Replies: 6
Views: 1591

Re: What is this?

It's a theodolite, for measuring angles in surveying. Nothing to do with microscopes. That's what I was thinking it is as well. It looks like it would be extremely heavy to use in the field, probably why they use more plastic in modern ones. I assume the viewfinder points down to get a measurement ...
by Bryan
Tue Nov 06, 2018 12:31 am
Forum: Illumination Techniques
Topic: The Next Big Thing, or, Back To The Future
Replies: 5
Views: 3162

Re: The Next Big Thing, or, Back To The Future

It looks like it could blow your eyeballs out of the back of your head. :shock:
by Bryan
Thu Nov 01, 2018 5:33 pm
Forum: Specimens, samples and slides
Topic: Storing and re-using slides
Replies: 11
Views: 4045

Re: Storing and re-using slides

Incompatible hazardous materials. Chemical: oxidizers (chlorine laundry bleach, hydrogen peroxide, calcium hypochlorite) Don't Mix With: petroleum-based materials, fuels, solvents, corrosives, heat Because: fire hazard, toxic gas generation https://rmehs.fullerton.edu/_documents/policiesandguideline...
by Bryan
Thu Nov 01, 2018 5:28 pm
Forum: Specimens, samples and slides
Topic: Storing and re-using slides
Replies: 11
Views: 4045

Re: Storing and re-using slides

I don't think it's safe to mix an oxidizer with a flammable liquid, be careful with that. I can see where the dish soap would help prevent drying spots. Kodak makes a product called Photo-Flo 200 that I use to prevent spots when drying photographic film, a small amount works really well. Mix it with...
by Bryan
Sat Oct 27, 2018 8:34 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

I have everything set up now with my trinocular head, now I need to start figuring out how to get some good photos with it. Special thanks to ebenbildmicroscopy for supplying the adapter for the trinocular head.
PA270679+s.jpg
PA270679+s.jpg (95.69 KiB) Viewed 9194 times
by Bryan
Wed Oct 24, 2018 10:25 pm
Forum: Pictures and Videos
Topic: Pool sample
Replies: 3
Views: 1280

Re: Pool sample

You may want to put a little chlorine in that pool. ;)
by Bryan
Wed Oct 24, 2018 6:21 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

There are several on eBay right now, it's called a MIKAS microscope adapter or just search for "Leitz microscope adapter". It's easy to adapt to any camera that has a removable lens, all you need is an adapter that goes from LTM or M39 thread mount to whatever mount you need for your camera. They al...
by Bryan
Tue Oct 23, 2018 10:05 pm
Forum: Beginner's corner
Topic: Condenser Height Adjustment
Replies: 9
Views: 3302

Re: Condenser Height Adjustment

As a general rule, I wind mine up to the very top, where it's brightest, and then lower it until I get good contrast. There are specifically stated position settings, but the people writing these in articles I have read usually say, "open it a little past the standard setting" and "adjust the conde...
by Bryan
Tue Oct 23, 2018 3:23 pm
Forum: Microscopy accessories
Topic: Forgive me if I try to manipulate you, a little!!
Replies: 23
Views: 9343

Re: Forgive me if I try to manipulate you, a little!!

That's very interesting, what does it use for the hydraulics, water, oil, air?
by Bryan
Sun Oct 14, 2018 2:25 am
Forum: Pictures and Videos
Topic: snail shell
Replies: 10
Views: 2664

Re: snail shell

Nice shot, did you also focus stack it? I’m just starting to learn about photomicrography so I would like to know ways to overcome the tiny depth of field.
by Bryan
Thu Oct 04, 2018 8:37 pm
Forum: Microscopes and optics
Topic: Enamel Care
Replies: 7
Views: 2477

Re: Enamel Care

What about repairing chips in the enamel? I was thinking of using automotive touch up paint, the kind they sell for filling in chips. It comes in a small jar, you just put a drop in a chip and it fills it in.
by Bryan
Wed Oct 03, 2018 8:21 pm
Forum: Collecting microscopes and slides
Topic: A new centerpiece for the brass section
Replies: 6
Views: 3985

Re: A new centerpiece for the brass section

Beautiful scope, what a great find. If you you're patient you can find some great deals like this on that auction site. It's often someone that doesn't know what they are selling and didn't take the time to research it. Sometimes they will misspell the name, I have found some great deals that way, L...
by Bryan
Fri Sep 28, 2018 5:25 pm
Forum: Introduce yourself
Topic: Hello from the Finger Lakes!
Replies: 3
Views: 2104

Re: Hello from the Finger Lakes!

Welcome Tom, I just joined this forum a few weeks ago after purchasing a 1957 Leitz SM microscope. I'm currently working on making it a trinocular microscope. I also have an appreciation for the build quality of these black enamel microscopes, that probably comes from my appreciation of the Leica ca...
by Bryan
Fri Sep 28, 2018 1:33 am
Forum: Pictures and Videos
Topic: Pol crystal mirror abstract
Replies: 7
Views: 1700

Re: Pol crystal mirror abstract

Nice job, it almost looks 3D.
by Bryan
Thu Sep 27, 2018 4:20 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

I've been using this setup to practice photographing things using a digital camera instead of the Nikon 35mm in the photos above. I'm still waiting for some supplies to arrive like a dye kit so hopefully I'll see some improvement with that. I'm a Geologist, not a Biologist so I may have misidentifie...
by Bryan
Tue Sep 25, 2018 3:19 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

Hobbyst46 wrote:
Bryan wrote:My calipers read 1.614 inches at the widest point which converts to 42.453mm...
Actually, 1.614x25.4=40.996mm...
Ooops, must have made a typo when I put it into the Google converter. That's good, it should fit then.
by Bryan
Tue Sep 25, 2018 12:39 am
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

MichaelG, I measured the male fitting that inserts into the microscope arm, it looks like it's about 43mm, does that compare to yours? Mmm ... This could get interesting/confusing My dovetail only measures 40.98mm diameter, but it has a surprisingly long cylindrical portion at that diameter. [ As i...
by Bryan
Mon Sep 24, 2018 5:48 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Re: Leitz SM Medical Microscope

Thanks for the responses! Looking at some of the literature on these microscopes it does look like they use the same parts between the Laborlux and the SM models. MichaelG, I measured the male fitting that inserts into the microscope arm, it looks like it's about 43mm, does that compare to yours? Je...
by Bryan
Sun Sep 23, 2018 10:21 pm
Forum: My microscope
Topic: Leitz SM Medical Microscope
Replies: 30
Views: 9964

Leitz SM Medical Microscope

I just received 1957 Leitz SM Medical binocular microscope kit. This is my first "real" microscope other than what I used in college and work years ago. I have an Edmunds Scientific Monocular 3 lens microscope which is basically a toy. I chose this one because it looks like a complete kit and I can ...
by Bryan
Tue Sep 18, 2018 9:15 pm
Forum: Introduce yourself
Topic: New Member from Seattle
Replies: 2
Views: 1914

Re: New Member from Seattle

Interesting story Bryan, it's always good to hear where a person comes from and a bit of their life story. You are certainly dedicated to stick with the old film and am sure you'll find the right scope to marry your camera too. I loved film in my day, the Pentax ME-super was my tool and I spent man...
by Bryan
Tue Sep 18, 2018 9:05 pm
Forum: Microscopy accessories
Topic: Trying to Identify a B&L Accessory
Replies: 5
Views: 2774

Re: Trying to Identify a B&L Accessory

This 1970 B&L microscope catalog has it listed on page 10, they call it an accessory slot compensator. Anyone have a use for one of these?

http://earth2geologists.net/Microscopes ... atalog.pdf
by Bryan
Tue Sep 18, 2018 8:41 pm
Forum: Microscopy accessories
Topic: Trying to Identify a B&L Accessory
Replies: 5
Views: 2774

Re: Trying to Identify a B&L Accessory

It looks to be a "tilting compensator", used in polarization studies of birefringent materials. It has nothing to do with the other item (the micrometer eyepiece). Here is a manual (top row, middle) for the Leitz equivalent (go to the pdf page 16 of the manual for the English version): http://micro...
by Bryan
Tue Sep 18, 2018 3:46 pm
Forum: Microscopy accessories
Topic: Trying to Identify a B&L Accessory
Replies: 5
Views: 2774

Re: Trying to Identify a B&L Accessory

Pete, you could be right, it may insert into the optical path somewhere. I attached another photo to give a better view of the part that would be inserted. The total length of the tab is 2.5 inches but there is a stop or raised edge that looks like it would only be inserted 1.5 inches. The tab that ...