Search found 3086 matches

by rnabholz
Wed Dec 21, 2022 10:55 pm
Forum: My microscope
Topic: AO/Spencer series 4.
Replies: 23
Views: 5127

Re: AO/Spencer series 4.

Great as usual Apo.

Here are a few more pics of one I am fond of...

https://www.homebuiltastronomy.com/AO4/index.htm
by rnabholz
Mon Feb 22, 2021 4:17 pm
Forum: Microscopy accessories
Topic: Where can I get a ringing table from?
Replies: 17
Views: 7490

Re: Where can I get a ringing table from?

I would agree that an eighth of an inch clearance could be problematic. It is not uncommon to have a coverslip shift during the curing of the mountant. That could present an issue on occasion. As to the idea of a motorized ringing table, I would suggest that it just adds an unnecessary layer of comp...
by rnabholz
Fri Feb 19, 2021 9:46 pm
Forum: Microscopy accessories
Topic: Where can I get a ringing table from?
Replies: 17
Views: 7490

Re: Where can I get a ringing table from?

If you can lay your hands on an old VCR, you can make one very easily.

viewtopic.php?p=26957#p26957

https://youtu.be/6Pnh4o7xgMc
by rnabholz
Fri Feb 12, 2021 12:21 am
Forum: My microscope
Topic: Multiplication
Replies: 7
Views: 3853

Re: Multiplication

Yep, like rabbits
20210211_181327.jpg
20210211_181327.jpg (129.11 KiB) Viewed 3776 times
by rnabholz
Wed Feb 03, 2021 6:36 pm
Forum: Pictures and Videos
Topic: Fossil Marine Diatoms in Brightfield
Replies: 19
Views: 7323

Re: Fossil Marine Diatoms in Brightfield

Thanks I used a digiscoping mount for the phone. Search Amazon for this: B0140U9ZPG It works well, a bit fiddly until you get it set up. Highly adjustable. The photos at the listing will give you an idea. I used it with both phones and small cameras with good success. As to the optional lens you ask...
by rnabholz
Sun Nov 08, 2020 1:46 pm
Forum: Home-made microscope adaptations
Topic: Oblique Masks
Replies: 10
Views: 10117

Re: Oblique Masks

Thanks Greg.

I have some of that polarizing film laying around here somewhere, I will have to give that a try.

Thanks

Rod
by rnabholz
Sat Nov 07, 2020 2:44 pm
Forum: Illumination Techniques
Topic: Oblique filter suggestions
Replies: 12
Views: 5608

Re: Oblique filter suggestions

Here is the approach that I used.

Very pleased with the results

viewtopic.php?t=4653

Rod
by rnabholz
Sun Oct 18, 2020 2:07 pm
Forum: Microscopy accessories
Topic: AO Orthoilluminator bulbs?
Replies: 3
Views: 3256

Re: AO Orthoilluminator bulbs?

Search for "BMY bulb", that should turn up more options.
by rnabholz
Sun Oct 18, 2020 2:07 pm
Forum: Microscopes and optics
Topic: AO Orthoilluminator bulbs?
Replies: 2
Views: 2328

Re: AO Orthoilluminator bulbs?

Search for "BMY bulb", that should turn up more options.
by rnabholz
Tue Aug 18, 2020 3:09 pm
Forum: Specimens, samples and slides
Topic: Does anyone else have this sample collecting problem?
Replies: 13
Views: 7055

Re: Does anyone else have this sample collecting problem?

viewtopic.php?p=37601#p37601

And post 325 in the same thread has more info on it.

Good luck

Rod
by rnabholz
Mon Jul 20, 2020 4:29 pm
Forum: Pictures and Videos
Topic: A Few Diatom Pictures
Replies: 8
Views: 4426

Re: A Few Diatom Pictures

Good Shootin' there Tex.
by rnabholz
Thu Apr 16, 2020 4:41 pm
Forum: Introduce yourself
Topic: First Time Microscope Owner in Minneapolis USA
Replies: 7
Views: 4406

Re: First Time Microscope Owner in Minneapolis USA

Maybe a Model 33?

You should be able to find it (try page 20 - and lots of other cool stuff) in here:

http://webmight.com/~psneeley/downloads/AOBlueBook.zip
by rnabholz
Fri Apr 10, 2020 7:56 pm
Forum: Home-made microscope adaptations
Topic: Oblique Masks
Replies: 10
Views: 10117

Re: Oblique Masks

The effect is more a cousin to brightfield than darkfield, but I mention it because it offers another way to expand your scopes capabilities with almost no cost. Oblique delivers images that show depth and relief which can offer some great insight into your subjects Here are a couple of threads with...
by rnabholz
Thu Apr 09, 2020 8:56 pm
Forum: Microscopy accessories
Topic: Mask Carrier for Scopes Without
Replies: 13
Views: 9895

Re: Mask Carrier for Scopes Without

Glad it is working for you.

Here is another DIY that I have come to use a bunch.

viewtopic.php?p=42429#p42429
by rnabholz
Wed Apr 08, 2020 4:57 pm
Forum: Microscopy accessories
Topic: Mask Carrier for Scopes Without
Replies: 13
Views: 9895

Re: Mask Carrier for Scopes Without

Yes.

You may find the closer you can get the filter or mask to the bottom of the condenser, tbe better the effect will be.

The great thing about DIY is the experimentation. Good luck.

Rod
by rnabholz
Wed Apr 08, 2020 2:03 am
Forum: Illumination Techniques
Topic: Making a filter holder
Replies: 5
Views: 3498

Re: Making a filter holder

Maybe something like this might work?

viewtopic.php?f=14&t=3606&p=33265#p33265
by rnabholz
Thu Jan 30, 2020 2:38 pm
Forum: Beginner's corner
Topic: New to hobby and have some questions
Replies: 6
Views: 6217

Re: New to hobby and have some questions

There should be some way to position a mask for darkfield, but you may need to get creative.

Here is the approach I took for one of my scopes. Maybe it will inspire you.

viewtopic.php?f=14&t=3606

Good luck
by rnabholz
Fri Dec 27, 2019 1:49 am
Forum: Microscopes and optics
Topic: American Optical Series 20 illumination
Replies: 5
Views: 3158

Re: American Optical Series 20 illumination

Hey Pete I had the exact same issue when putting together my 20. Discovered the two versions with and without the stand offs. I wrote about it starting at entry 105 of this thread: http://www.microbehunter.com/microscopy-forum/viewtopic.php?f=24&t=776&start=90 Worth the bother though, great stand. G...
by rnabholz
Sun Jul 14, 2019 5:17 pm
Forum: Microscopes and optics
Topic: Looking for a User's Manual for American Optical Epistar scope.
Replies: 12
Views: 9342

Re: Looking for a User's Manual for American Optical Epistar scope.

Welcome back, Rod! Your reappearance even lured Kurt out from his cave :mrgreen: Over at photomacrography, people would usually remove that epi scope's specimen stage and put a small multidirectional goniometer stage to precisely position opaque subjects (typically insects). Here is an example: htt...
by rnabholz
Sun Jul 14, 2019 5:07 pm
Forum: Microscopes and optics
Topic: Looking for a User's Manual for American Optical Epistar scope.
Replies: 12
Views: 9342

Re: Looking for a User's Manual for American Optical Epistar scope.

Rod - don't know where you can find a manual, but the earlier industrial scopes (and I believe Xmission or someone has a manual for those) are essentially similar - certainly the same objectives. Looks to me like you could retrofit a condenser and transmitted illumination to that stand, perhaps usi...
by rnabholz
Sun Jul 14, 2019 4:57 pm
Forum: Microscopes and optics
Topic: Looking for a User's Manual for American Optical Epistar scope.
Replies: 12
Views: 9342

Re: Looking for a User's Manual for American Optical Epistar scope.

I'll tell you what would be a fun thing to do with it: sell it to me. :P :lol: Seriously, I just wrote our buddy Tom asking (more) questions about these stands (again), been wanting one for the past little while but have been consumed with rebuilding my antique house for the past 6 months, before i...
by rnabholz
Sat Jul 13, 2019 11:08 pm
Forum: Microscopes and optics
Topic: Looking for a User's Manual for American Optical Epistar scope.
Replies: 12
Views: 9342

Looking for a User's Manual for American Optical Epistar scope.

I am looking for a User's manual for this scope, An American Optical Epi scope. I believe it to be a model 1860 Epistar, but there is no badging on the scope identifying as such. I checked the Xmission AO pages - did not see what I was looking for there. I would be pleased with a PDF copy and willin...
by rnabholz
Mon Mar 18, 2019 9:15 pm
Forum: Pictures and Videos
Topic: Cyclopoid nauplius
Replies: 10
Views: 7066

Re: Cyclopoid nauplius

Outstanding 75!!

Just when I think you can't do any better, you raise the bar again.

Really beautiful work.

Rod
by rnabholz
Wed Jan 23, 2019 7:25 pm
Forum: Microscopy accessories
Topic: Slide ringing table
Replies: 18
Views: 14691

Re: Slide ringing table

Hi Bob, I guess form follows function. As I mentioned, I followed Kurt's lead, and it works very well. I agree that some extra mass in the table is a definite advantage. The VCR head works very, very well for this purpose. Mine will spin for just shy of 2 minutes before stopping completely, and over...
by rnabholz
Wed Jan 23, 2019 2:15 pm
Forum: Microscopy accessories
Topic: Slide ringing table
Replies: 18
Views: 14691

Re: Slide ringing table

MicroBob wrote:Hi Kurt,
your design is very nice especially as it is based upon widely availabe components.

Bob
Kurt's was the inspiration for mine.
Slide Ringing Table Finished 45.jpg
Slide Ringing Table Finished 45.jpg (90.48 KiB) Viewed 14486 times
RingingTableWork.jpg
RingingTableWork.jpg (145.39 KiB) Viewed 14486 times
by rnabholz
Wed Dec 05, 2018 11:59 am
Forum: Pictures and Videos
Topic: Gammarus spp In Different Lights
Replies: 3
Views: 2858

Re: Gammarus spp In Different Lights

Interesting fellow, don't believe I have ever seen one before.

Nice study in illumination effects too.
by rnabholz
Sat Dec 01, 2018 7:08 pm
Forum: Pictures and Videos
Topic: more Biddulphia pulchella
Replies: 16
Views: 8188

Re: more Biddulphia pulchella

Another winner 75.

Interesting to see it live and "assembled".

Great stuff, thanks for posting