Search found 310 matches

by Element 56
Fri Jan 22, 2021 3:47 pm
Forum: Microscopes and optics
Topic: Brass Rack and pinions designed to run dry?
Replies: 17
Views: 2094

Re: Brass Rack and pinions designed to run dry?

Typically a rack and pinion is located in close proximity to a sliding dovetail. For the dovetails, I typically use a a very light coat of Nyogel 774 VL, which is the lightest in the series of nyogel 774s. https://scontent.fyvr1-1.fna.fbcdn.net/v/t1.0-9/118784231_10157644493701732_55921885995032573...
by Element 56
Fri Jan 22, 2021 2:41 am
Forum: Miscellaneous
Topic: Vibration dampening
Replies: 10
Views: 226

Re: Vibration dampening

Regardless of whether or not you put your microscope in the basement I highly recommend controlling the humidity down there like Bram said. I failed to do that properly and ended up regretting it. I run two dehumidifiers and no longer have any humidity issues. Once you get the dehumidifier down ther...
by Element 56
Tue Jan 12, 2021 9:41 pm
Forum: For forum members who want to buy and sell equipment
Topic: AO Cycloptic Stereo
Replies: 15
Views: 945

Re: AO Cycloptic Stereo

I just checked it and it has 5 positions. I don't think it matches what is displayed on the knob.

I need to stop messing with it because every time I do I think about keeping it. If someone here doesn't take it , it's possible it will never make it to eBay :mrgreen:
by Element 56
Mon Jan 11, 2021 11:13 pm
Forum: For forum members who want to buy and sell equipment
Topic: AO Cycloptic Stereo
Replies: 15
Views: 945

Re: AO Cycloptic Stereo

I'm going to reduce the price one time before moving to eBay. $185 plus shipping. Based on past sales of these the price is more than fair and unlike most eBay instruments this one is ready to be used. You can calculate the shipping cost on your own using the info in my original post via USPS Priori...
by Element 56
Sun Dec 27, 2020 5:12 pm
Forum: For forum members who want to buy and sell equipment
Topic: AO Cycloptic Stereo
Replies: 15
Views: 945

Re: AO Cycloptic Stereo

That would have been a nice Christmas present for someone, Kirby. Can't remember if I recommended a method . Wattle and daub was it? I still think you should hold out for a pair of those B & L U.W.F. 15X eyepieces for it. Eventually a pair will show up at a welcome price. They give the same actual ...
by Element 56
Sat Dec 26, 2020 7:25 pm
Forum: Microscopes and optics
Topic: Leitz Orthoplan focus block disassembly docuemtation
Replies: 14
Views: 1335

Re: Leitz Orthoplan focus block disassembly docuemtation

Kirby Looking at the photograph here: http://science-info.net/pages/Arthur_Rose/CircularLevel.jpg I suspect that the knurled ring is a protective cover for a male RMS screw-thread on the stem of the tool. MichaelG. . Edit : suspicion confirmed: http://couger.org/microscope/Roseoptics/Circlar-level-...
by Element 56
Sat Dec 26, 2020 3:47 pm
Forum: Specimens, samples and slides
Topic: vintage slides
Replies: 7
Views: 1071

Re: vintage slides

Hey don't be busting on antique lenses! :mrgreen: Early lens makers knew what they were doing! Just like today some Victorian lenses were better than others however I regularly use objectives that are over 100 years old and the optical quality is excellent. Of course there's no fancy lens coatings ...
by Element 56
Sat Dec 26, 2020 3:26 pm
Forum: Microscopes and optics
Topic: Leitz Orthoplan focus block disassembly docuemtation
Replies: 14
Views: 1335

Re: Leitz Orthoplan focus block disassembly docuemtation

I want to add a few things to PrecisionInstruments excelent post. First someone asked about the proper tools to work on microscopes and I wanted to share this kit I bought a few years ago. It's definitely an economy set but still worth the money. The blades are properly ground to fit the slot on the...
by Element 56
Sat Dec 26, 2020 3:20 pm
Forum: Pictures and Videos
Topic: Finally found a working 47.5 B&L Apo what a fine lens
Replies: 18
Views: 556

Re: Finally found a working 47.5 B&L Apo what a fine lens

Kind of paints a bad picture of the old B & Ls. but it is unfair. So, I have been at this a while. 25 years ago, most of the objectives that came up for sale were good. I think I went through six or seven 45 and 47.5X B & L apochromats with maybe one dud amongst them. Same with 90X and the 20s. The...
by Element 56
Sat Dec 26, 2020 2:37 pm
Forum: For forum members who want to buy and sell equipment
Topic: AO Cycloptic Stereo
Replies: 15
Views: 945

Re: AO Cycloptic Stereo

Does anyone know for sure if A.O. used epoxy to cement these prisms? Been a while since I reglued some, but my recollection is that the existing cement was originally somewhat flexible? The epoxy I use (West Systems G-Flex) is flexible, made for dissimilar materials and according to the manufacture...
by Element 56
Fri Dec 25, 2020 5:27 pm
Forum: Pictures and Videos
Topic: Finally found a working 47.5 B&L Apo what a fine lens
Replies: 18
Views: 556

Re: Finally found a working 47.5 B&L Apo what a fine lens

Nice lens Bram!

I have two one of which I rebuilt. It was dirty and the correction collar was seized. The other which is cosmetically the nicer of the two has some really bad delamination. One of these days I'll try to fix it!

Kirby
by Element 56
Fri Dec 25, 2020 5:12 pm
Forum: For forum members who want to buy and sell equipment
Topic: AO Cycloptic Stereo
Replies: 15
Views: 945

Re: AO Cycloptic Stereo

That would have been a nice Christmas present for someone, Kirby. Can't remember if I recommended a method . Wattle and daub was it? I still think you should hold out for a pair of those B & L U.W.F. 15X eyepieces for it. Eventually a pair will show up at a welcome price. They give the same actual ...
by Element 56
Thu Dec 24, 2020 11:35 pm
Forum: For forum members who want to buy and sell equipment
Topic: AO Cycloptic Stereo
Replies: 15
Views: 945

AO Cycloptic Stereo

I have this really nice stereo scope that I don't need so I'm going to offer it here before listing on eBay. Price is $225 plus freight. I'm it's a US sale only. The microscope is in great condition. The prisms in the binoculars have been reinforced at the suggestion of apochronaut. I know I've had ...
by Element 56
Thu Dec 10, 2020 9:45 pm
Forum: Beginner's corner
Topic: Is it safe to buy Used Microscopes and parts
Replies: 16
Views: 1349

Re: Is it safe to buy Used Microscopes and parts

Thank you. Very informative. I will not use bleach on a microscope I think, maybe first time on very exposed parts. Will use 70% alcohol. I made a box with 70 Watt UV lamp inside. I know that it is very harmful to eyes and even skin. Even plastic, rubber, paints. etc. But should do no harm to think...
by Element 56
Thu Dec 10, 2020 4:09 pm
Forum: Microscopes and optics
Topic: Leitz Orthoplan focus block disassembly docuemtation
Replies: 14
Views: 1335

Re: Leitz Orthoplan focus block disassembly docuemtation

You probably softened the grease temporarily and when the solvent evaporated it seized. That's my guess anyway. There is a plastics gear inside (page 16 #9 in yellow) but I doubt it swelled. http://www.microscopy-uk.org.uk/mag/artoct09/The_Leitz_Orthoplan_and_Ortholux_II_Research_Microscopes_Ver_4.p...
by Element 56
Sun Nov 22, 2020 4:09 am
Forum: Microscopy accessories
Topic: Cotton rolls for lens cleaning?
Replies: 10
Views: 4919

Re: Cotton rolls for lens cleaning?

Kim wipes are only optic safe when wet. I use Kim Wipes all the time and I clean optics ever day. The wipe doesn't scratch lenses but people do. Regarding swabs it's got more to do with technique. When cleaning a single element I may go through 6-12 swabs depending on how bad it is. A tightly wrappe...
by Element 56
Sat Nov 21, 2020 3:18 pm
Forum: Microscopes and optics
Topic: leitz series 600 condenser spring needed
Replies: 5
Views: 978

Re: leitz series 600 condenser spring needed

henryr, Unfortunately the diameter of my stock is either slightly too big or the spring itself is too light. The closest thing I have to it has a .120" OD and it's too tight. If someone here has spring stock for an AO model 10 binocular head focus arm that may work. The AO part number in my catalog ...
by Element 56
Sat Nov 21, 2020 3:36 am
Forum: Microscopes and optics
Topic: leitz series 600 condenser spring needed
Replies: 5
Views: 978

Re: leitz series 600 condenser spring needed

henryr,
I'll check my stock against the dimensions you gave and PM you tomorrow.
Kirby
by Element 56
Fri Nov 20, 2020 9:08 pm
Forum: Microscopes and optics
Topic: leitz series 600 condenser spring needed
Replies: 5
Views: 978

Re: leitz series 600 condenser spring needed

henryr,

I just worked on one of these but don't remember if they're coil springs or leaf springs? I can take one apart and double check the type and size. I should have the correct spring stock to cut them from.

Where are you located?

Kirby
by Element 56
Mon Nov 16, 2020 7:42 pm
Forum: Microscopes and optics
Topic: White sealant on objectives - what is it?
Replies: 2
Views: 707

Re: White sealant on objectives - what is it?

Nikon uses (or used to) a hard epoxy-like seal. The closest thing I've found to it is JB Weld. However, I've been using Permatex Ultra Black Advanced Formula on all my objectives. It's an oil resistant silicon sealer. So far so good!

Kirby
by Element 56
Thu Nov 12, 2020 9:47 pm
Forum: Microscopes and optics
Topic: Necessary dissuasive assistance is requested. Disassemble Leitz phaco Npl 25x objective.
Replies: 14
Views: 1661

Re: Necessary dissuasive assistance is requested. Disassemble Leitz phaco Npl 25x objective.

Although a medium such as cotton won't necessarily increase the abrasive action it is however the abrasive that does the work. So it's just a matter of not overdoing it. You would be surprised how much material one can remove via hand polishing with something like Brasso or Prelim etc.. Yes it can b...
by Element 56
Thu Nov 12, 2020 9:39 pm
Forum: Digital processing
Topic: Image Stacking Questions
Replies: 4
Views: 901

Re: Image Stacking Questions

Roldorf wrote:
Thu Nov 12, 2020 8:34 am
It doesn't do anything with the parts that are out of focus. It 'copies' the parts of the images that are 'in' focus and combines those 'in focus' parts into a new image.
Thanks
by Element 56
Thu Nov 12, 2020 1:49 am
Forum: Specimens, samples and slides
Topic: vintage slides
Replies: 7
Views: 1071

Re: vintage slides

They certainly did not have our optics. Greg Hey don't be busting on antique lenses! :mrgreen: Early lens makers knew what they were doing! Just like today some Victorian lenses were better than others however I regularly use objectives that are over 100 years old and the optical quality is excelle...
by Element 56
Thu Nov 12, 2020 1:22 am
Forum: Introduce yourself
Topic: Reintroduction
Replies: 4
Views: 1347

Re: Reintroduction

Hi Joey,
Welcome back! You have some nice videos thanks for sharing them.
Kirby
by Element 56
Thu Nov 12, 2020 12:58 am
Forum: Digital processing
Topic: Image Stacking Questions
Replies: 4
Views: 901

Re: Image Stacking Questions

EYE C U wrote:
Thu Nov 12, 2020 12:40 am
the left overs will be best focus..
Not sure I understand your response?
by Element 56
Thu Nov 12, 2020 12:51 am
Forum: Microscopes and optics
Topic: Necessary dissuasive assistance is requested. Disassemble Leitz phaco Npl 25x objective.
Replies: 14
Views: 1661

Re: Necessary dissuasive assistance is requested. Disassemble Leitz phaco Npl 25x objective.

That's great I'm glad you made it better! One thing to be careful of is using anything overly abrasive inside the barrel. I overdid it once with prelim and it actually made the barrel slightly oversized. Ultimately it was okay but had I gone much further I imagine I would have needed to shim it. One...
by Element 56
Thu Nov 12, 2020 12:25 am
Forum: Digital processing
Topic: Image Stacking Questions
Replies: 4
Views: 901

Image Stacking Questions

I have a dumb question bout image stacking. I am using CombineZP and I'm really struggling with it on some things. What does the software do with the part of the photos that are out of focus? I took a series of 9 photos of a part of an artificial heart valve. The section I'm photographing isn't flat...
by Element 56
Wed Nov 11, 2020 9:30 pm
Forum: Camera systems and imaging
Topic: Red dot of light in pictures. How to get rid of it?
Replies: 6
Views: 1091

Re: Red dot of light in pictures. How to get rid of it?

I think you will find Chris will have hit the nail on the head!
by Element 56
Wed Nov 11, 2020 7:34 pm
Forum: Miscellaneous
Topic: Mineralogy, Metallurgy
Replies: 11
Views: 1404

Re: Mineralogy, Metallurgy

I have four petrographic stands and I really enjoy using them, however, I can't really say I'm doing any serious study at the moment. I've made some mineral and wood thin sections and I look forward to doing more. I have read as someone already suggested that crushed samples are suitable and even p...
by Element 56
Tue Nov 10, 2020 8:02 pm
Forum: Miscellaneous
Topic: Mineralogy, Metallurgy
Replies: 11
Views: 1404

Re: Mineralogy, Metallurgy

I have four petrographic stands and I really enjoy using them, however, I can't really say I'm doing any serious study at the moment. I've made some mineral and wood thin sections and I look forward to doing more. I have read as someone already suggested that crushed samples are suitable and even pr...