Search found 3066 matches

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: 11
Views: 942

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: 11
Views: 942

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: 11
Views: 942

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: 11
Views: 942

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: 2280

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: 16
Views: 5210

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: 16
Views: 5210

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 5005 times
RingingTableWork.jpg
RingingTableWork.jpg (145.39 KiB) Viewed 5005 times
by rnabholz
Wed Dec 05, 2018 11:59 am
Forum: Pictures and Videos
Topic: Gammarus spp In Different Lights
Replies: 3
Views: 724

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: 1808

Re: more Biddulphia pulchella

Another winner 75.

Interesting to see it live and "assembled".

Great stuff, thanks for posting
by rnabholz
Sat Dec 01, 2018 12:29 am
Forum: Pictures and Videos
Topic: Oamaru IV
Replies: 8
Views: 968

Re: Oamaru IV

zzffnn wrote:Beautiful forms, thank you for sharing, Rob!
Thanks zz
by rnabholz
Fri Nov 30, 2018 2:18 pm
Forum: Pictures and Videos
Topic: Oamaru IV
Replies: 8
Views: 968

Re: Oamaru IV

All great images! I think I like the first one the best. Same with me. The non-uniform ornamentation pattern of the diatoms in the 2nd and 3rd images is intriguing: are the tiny holes blocked? by a calcareous precipitate? Thanks Hobby. Regarding the tri-lobed diatom, which I believe to be Tricerati...
by rnabholz
Fri Nov 30, 2018 2:10 pm
Forum: Pictures and Videos
Topic: Oamaru IV
Replies: 8
Views: 968

Re: Oamaru IV

75RR wrote:more really lovely images!

I see that they are numbered, is this part of a future ID project? Web page ... book?
Thank you 75.

The numbering is another go at organizing the images on my hard drive, no larger plan to clutter the world with my attempts at imaging.
by rnabholz
Fri Nov 30, 2018 2:43 am
Forum: Pictures and Videos
Topic: Oamaru IV
Replies: 8
Views: 968

Re: Oamaru IV

All great images! I think I like the first one the best. I take it you did a lot of image editing to eliminate background clutter? I think it does help the viewer to concentrate on the image. Great to see another 4 series user, too. Thanks Rick. Yes, I should have mentioned that I cleaned things up...
by rnabholz
Fri Nov 30, 2018 1:53 am
Forum: Pictures and Videos
Topic: Oamaru IV
Replies: 8
Views: 968

Oamaru IV

More from the Oamaru New Zealand fossil sample

AO Apostar 4, 90x Apo, Oblique Mask, Canon 70D, Stacked using Zerene Stacker PMax routine
89µm
89µm
Oamaru 0395 ZS PMax Final.jpg (58.39 KiB) Viewed 968 times
79µm
79µm
Oamaru 0364 ZS PMax Final.jpg (61.38 KiB) Viewed 968 times
81µm
81µm
Oamaru 0376 ZS PMax Final.jpg (73.41 KiB) Viewed 968 times
by rnabholz
Fri Nov 30, 2018 1:07 am
Forum: Pictures and Videos
Topic: Amoeba (arcella?) 'walking'
Replies: 14
Views: 1264

Re: Amoeba (arcella?) 'walking'

Very cool.

Agree with 75 - great idea to speed it up.
by rnabholz
Fri Nov 30, 2018 1:03 am
Forum: Pictures and Videos
Topic: Pleurosigma + 2 Anisonema vitrea
Replies: 8
Views: 907

Re: Pleurosigma + 2 Anisonema vitrea

Oh my...........

Words fail.

You are killing it 75.
by rnabholz
Fri Nov 30, 2018 1:02 am
Forum: Pictures and Videos
Topic: A Darkfield Stop and a Diatom Slide
Replies: 2
Views: 681

Re: A Darkfield Stop and a Diatom Slide

Excellent - love to see this kind of experimentation.

I had good luck with stops with 10 and 20x objectives, at 40x it got to be a real trick getting the precise alignment and the stop size right.

Great job, keep posting your results.

Rod
by rnabholz
Wed Nov 28, 2018 3:20 am
Forum: Pictures and Videos
Topic: Oamaru III
Replies: 10
Views: 1026

Re: Oamaru III

MichaelG. wrote:
rnabholz wrote:Not 100% sure, but I believe it is a sponge spicule.
Thanks for that ^^^

Wikipedia endorses your belief:
https://en.m.wikipedia.org/wiki/File:De ... ersity.png
https://en.m.wikipedia.org/wiki/Sponge_spicule
MichaelG.
Well, there you go! Thanks Michael.
by rnabholz
Wed Nov 28, 2018 12:14 am
Forum: Pictures and Videos
Topic: Oamaru III
Replies: 10
Views: 1026

Re: Oamaru III

einman wrote:Very nice. Suitable for framing!
Thank you einman.
by rnabholz
Wed Nov 28, 2018 12:14 am
Forum: Pictures and Videos
Topic: Oamaru III
Replies: 10
Views: 1026

Re: Oamaru III

MichaelG. wrote:Please pardon my ignorance, but ... what is the first picture ?

It's quite an extraordinary shape.
[beautifully imaged]

MichaelG.
Hi Michael,

Not 100% sure, but I believe it is a sponge spicule.

Standing by for correction and illumination.
by rnabholz
Wed Nov 28, 2018 12:11 am
Forum: Pictures and Videos
Topic: Oamaru III
Replies: 10
Views: 1026

Re: Oamaru III

billbillt wrote:These photos are excellent...

BillT
Thank you Bill
by rnabholz
Tue Nov 27, 2018 3:48 pm
Forum: Pictures and Videos
Topic: Oamaru III
Replies: 10
Views: 1026

Re: Oamaru III

75RR wrote:Sharp detail and very smooth looking images. Very nice!
Thank you 75.
by rnabholz
Tue Nov 27, 2018 2:29 am
Forum: Pictures and Videos
Topic: Oamaru III
Replies: 10
Views: 1026

Oamaru III

More sights from a Oamaru New Zealand sample

AO 4 Apostar, 43 and 90x Apo Objectives, Oblique Mask, Canon 70D, Stacked using Zerene Stacker PMax routine.
43X  300µm
43X 300µm
Oamaru 0292 ZS PMax Final.jpg (44.11 KiB) Viewed 1026 times
90x  108µm
90x 108µm
Oamaru 0331 ZS PMax Final.jpg (78.59 KiB) Viewed 1026 times
90x  63µm
90x 63µm
Oamaru 0307 ZS PMax Final.jpg (62.61 KiB) Viewed 1026 times
by rnabholz
Fri Nov 23, 2018 11:08 pm
Forum: Pictures and Videos
Topic: Miscellaneous Photomicrographs
Replies: 13
Views: 1366

Re: Miscellaneous Photomicrographs

Outstanding images. Thanks very much for posting them for us.
by rnabholz
Fri Oct 26, 2018 2:36 am
Forum: Pictures and Videos
Topic: Oamaru II
Replies: 9
Views: 1107

Re: Oamaru II

KurtM wrote:If I were you, I'd hang lights on that last one and use it for a holiday decoration. 8-)
Might need a micromanipulator to put the star on top.
by rnabholz
Fri Oct 26, 2018 1:59 am
Forum: Introduce yourself
Topic: Hello from Toronto
Replies: 4
Views: 2047

Re: Hello from Toronto

KurtM wrote:
Aslan wrote:I am also an amateur astronomer and photographer so I guess I love all things optical.
That's a very similar resume to couple of us here. Welcome!
Yes there are a few kindred spirits hanging around these parts...

Welcome to the group.

Rod
by rnabholz
Fri Oct 26, 2018 1:57 am
Forum: Pictures and Videos
Topic: Cyanobacteria - Gloeotrichia
Replies: 17
Views: 3055

Re: Cyanobacteria - Gloeotrichia

Your commitment to go the extra mile shows through in the spectacular results. Just beautiful, well done

Rod
by rnabholz
Thu Oct 25, 2018 11:01 pm
Forum: Pictures and Videos
Topic: Oamaru II
Replies: 9
Views: 1107

Re: Oamaru II

Hi Bob, Glad you like them, there will be more to come. We are in agreement on your IDs. That spicule really grabbed my attention. I think it was about a 50 image stack to capture its depth. The second one is playing mind games with me, I see it as convex, look away and back and it is concave. Goofy...
by rnabholz
Thu Oct 25, 2018 6:41 pm
Forum: Pictures and Videos
Topic: Fossil BiValve:
Replies: 4
Views: 729

Re: Fossil BiValve:

Beautiful fine details in that first one. Very cool, thanks for showing us.

Rod