How to attach camera to Olympus BH2?

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cooperplace
Posts: 2
Joined: Fri Nov 25, 2016 3:06 am

How to attach camera to Olympus BH2?

#1 Post by cooperplace » Tue Apr 02, 2019 8:02 am

I've inherited a BH2 with a trinoc head. The trinoc head has an Olympus part U-PMTVC on it, which has a c-mount. There's an objective in it, marked
"NFK 3.3xL
125"

I'd like to take still color photos with this microscope. Is there a quick, easy way I can attach a 35mm digital camera body to this?
thanks

MichaelG.
Posts: 1496
Joined: Mon Apr 10, 2017 8:24 am
Location: NorthWest England

Re: How to attach camera to Olympus BH2?

#2 Post by MichaelG. » Tue Apr 02, 2019 8:09 am

Alan Wood has all the information you are likely to need
... This is a good 'landing page'
http://alanwood.net/photography/olympus ... scope.html

MichaelG.
Too many 'projects'

cooperplace
Posts: 2
Joined: Fri Nov 25, 2016 3:06 am

Re: How to attach camera to Olympus BH2?

#3 Post by cooperplace » Tue Apr 02, 2019 9:06 am

thanks, yes I saw that. It doesn't answer the question: can a c-mount be used to satisfactorily attach a 35mm camera?

MichaelG.
Posts: 1496
Joined: Mon Apr 10, 2017 8:24 am
Location: NorthWest England

Re: How to attach camera to Olympus BH2?

#4 Post by MichaelG. » Tue Apr 02, 2019 12:20 pm

cooperplace wrote:thanks, yes I saw that. It doesn't answer the question: can a c-mount be used to satisfactorily attach a 35mm camera?
A c-mount does not have the clear aperture to cover a 35mm frame, and its flange to image plane distance is shorter than of many 35mm cameras.
... So the short answer would be NO
[ depending, I suppose, on your definition of 'satifactorily attach' ]

A micro 4/3 camera would be a much more realistic proposition.

MichaelG.
.
P.S. What 35mm camera are you planning to use ?
Too many 'projects'

MichaelG.
Posts: 1496
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Location: NorthWest England

Re: How to attach camera to Olympus BH2?

#5 Post by MichaelG. » Tue Apr 02, 2019 12:25 pm

cooperplace wrote: There's an objective in it, marked
"NFK 3.3xL
125"
No, that's a projection eyepiece not an objective
... May I suggest that you look again at Alan Wood's site.

MichaelG.
Too many 'projects'

Tom Jones
Posts: 113
Joined: Wed Apr 13, 2016 3:47 pm

Re: How to attach camera to Olympus BH2?

#6 Post by Tom Jones » Tue Apr 02, 2019 3:39 pm

I use that very setup to project, essentially direct project as the NFK 3.3x and 0.3x lens in the U-PMTVC essentially cancel magnifications, onto the sensor of my Panasonic GH4 for 4K video. Since the GH4 is mirrorless, a C-mount adapter fits fine, and I get the necessary final corrections in the NFK eyepiece.

That is what I used to shoot this on a BHS: https://www.nikonsmallworld.com/galleri ... er-feeding

I used the same setup on a SZH stereo to shoot this: https://www.youtube.com/watch?v=OMNHuab9hKE

Mirrored cameras will need an Olympus Photomicro Adapter L, an easier to find Diagnostic Instruments PA1-10A, or another adapter of the same length and T-mount, along with a projection lens. Full frame takes an NFK 2.5x projection eyepiece, and APS-C sensors take the very pricey NFK 1.67x for optimal coverage. There are other adapters available, both with and without internal lenses that you can use to adapt the projection dimensions to your sensor. Understand each resolution on each sensor may have different dimensions. On my GH4 4K UHD and 4K DCI use different dimensions on the sensor. Look in your user guide to see the effects of different resolutions on the pixel dimensions used.

Tom

Scarodactyl
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Joined: Sat Mar 03, 2018 9:09 pm

Re: How to attach camera to Olympus BH2?

#7 Post by Scarodactyl » Tue Apr 02, 2019 5:01 pm

If you don't mind the look this is a very cheap and effective solution: viewtopic.php?f=12&t=7329
You'd want to get an nfk 2.5x eventually for full frame, but the 3.3 you already have would probably be just fine for the mean time it would just produce some cropping.

georgetmacro
Posts: 37
Joined: Mon Sep 18, 2017 10:12 pm

Re: How to attach camera to Olympus BH2?

#8 Post by georgetmacro » Tue Apr 09, 2019 4:44 am

I have an Olympus CH with a BH-2 trinocular head. I have made a mount for Nikon F ( I use microscopy dedicated Nikon D200) but was not satisfied with it so have ordered one from an Ebay supplier in America, (newhopper (4872)). His price was US$59 with a 'make an offer' option. I got mine ordered for US$47 plus US$21 postage and ~US$12 customs. The total was AU$116. I thought this was OK because the supplier makes them up to suit the parfocal arrangement of the microscope. Although mine is probably not quite right given that it is a hybrid CH/BH-2.

DennyNY
Posts: 4
Joined: Sat Nov 09, 2019 2:42 am

Re: How to attach camera to Olympus BH2?

#9 Post by DennyNY » Sun Nov 10, 2019 7:44 pm

Tom Jones wrote:
Tue Apr 02, 2019 3:39 pm
I use that very setup to project, essentially direct project as the NFK 3.3x and 0.3x lens in the U-PMTVC essentially cancel magnifications, onto the sensor of my Panasonic GH4 for 4K video. Since the GH4 is mirrorless, a C-mount adapter fits fine, and I get the necessary final corrections in the NFK eyepiece.
Hi Tom.
Is this setup parfocal?
I got old Lumix g3, looks like the same sensor size
I want to replicate yours setup.
Thank you.

Tom Jones
Posts: 113
Joined: Wed Apr 13, 2016 3:47 pm

Re: How to attach camera to Olympus BH2?

#10 Post by Tom Jones » Sun Nov 10, 2019 9:48 pm

It can be. The U-PMTVC has screw threads that will allow you to adjust it's length a bit to make it parfocal. Adjust focus in the right eyepiece, match it with the left, then adjust the U-PMTVC (screw it in or out) until the camera focus matches what you see in the eyepieces. I use a -H focusing eyepiece on the right side to fine-tune it.

Tom

DennyNY
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Joined: Sat Nov 09, 2019 2:42 am

Re: How to attach camera to Olympus BH2?

#11 Post by DennyNY » Wed Nov 20, 2019 6:25 pm

Tom Jones wrote:
Sun Nov 10, 2019 9:48 pm
It can be. The U-PMTVC has screw threads that will allow you to adjust it's length a bit to make it parfocal. Adjust focus in the right eyepiece, match it with the left, then adjust the U-PMTVC (screw it in or out) until the camera focus matches what you see in the eyepieces. I use a -H focusing eyepiece on the right side to fine-tune it.

Tom
Thank you Tom for your respond.
I got all setup but Im having problem on focusing part.
My U-PMTVC screwed all in and picture looks almost sharp. It looks like a little more in and it will be perfect, but i cant adjust any more signs U-PMTVC already all in.

Do i missing somthing or mine microscope defective? (I got it from Craigslist)

I have access to the lathe machine. I can lower NFK lens a little but not sure if will be helpful.
Thank you.

Tom Jones
Posts: 113
Joined: Wed Apr 13, 2016 3:47 pm

Re: How to attach camera to Olympus BH2?

#12 Post by Tom Jones » Thu Nov 21, 2019 8:17 am

Are you saying you cannot get the camera by itself in focus, or cannot get the camera focus and eyepiece focus to match?

If the camera image won't come into focus, something is wrong.

Scarodactyl
Posts: 419
Joined: Sat Mar 03, 2018 9:09 pm

Re: How to attach camera to Olympus BH2?

#13 Post by Scarodactyl » Thu Nov 21, 2019 3:45 pm

The flange distance is probably too long on your camera. (Sensor is too far inside the camera).

Tom Jones
Posts: 113
Joined: Wed Apr 13, 2016 3:47 pm

Re: How to attach camera to Olympus BH2?

#14 Post by Tom Jones » Thu Nov 21, 2019 5:25 pm

Some of the available micro 4/3 C-mount adapters don't like the flat top on the U-PMTVC and won't screw on completely before they bottom out. Mine just barely makes it.

That could make the adapter-camera sensor distance too long even with the adapter fully screwed together.

DennyNY
Posts: 4
Joined: Sat Nov 09, 2019 2:42 am

Re: How to attach camera to Olympus BH2?

#15 Post by DennyNY » Thu Nov 21, 2019 9:30 pm

Tom Jones wrote:
Thu Nov 21, 2019 8:17 am
Are you saying you cannot get the camera by itself in focus, or cannot get the camera focus and eyepiece focus to match?

If the camera image won't come into focus, something is wrong.
Yes , I can't get focus match.
I guess its an adapter.

jfiresto
Posts: 83
Joined: Fri Feb 15, 2019 8:19 am
Location: Northern Germany

Re: How to attach camera to Olympus BH2?

#16 Post by jfiresto » Fri Nov 22, 2019 11:31 am

Does your trinocular BH2 provide an intermediate ISO 38 mm photo port? I have seen references to a 38 mm clamp or dovetail, and was wondering if it is was one and the same.

If it is, I know a couple ISO to c-mount adapters that will (just) fully spin into most c-mount to micro four thirds thread adapters. (You have to bury the c-mount flange a little into the camera's to match its flange focal distance.) I also have one that won't.
-John

DennyNY
Posts: 4
Joined: Sat Nov 09, 2019 2:42 am

Re: How to attach camera to Olympus BH2?

#17 Post by DennyNY » Fri Nov 22, 2019 7:59 pm

jfiresto wrote:
Fri Nov 22, 2019 11:31 am
Does your trinocular BH2 provide an intermediate ISO 38 mm photo port? I have seen references to a 38 mm clamp or dovetail, and was wondering if it is was one and the same.

If it is, I know a couple ISO to c-mount adapters that will (just) fully spin into most c-mount to micro four thirds thread adapters. (You have to bury the c-mount flange a little into the camera's to match its flange focal distance.) I also have one that won't.
Yes i do have 38mm dovetail port.
Im working with CAD software applications and I'm planing to recreate dovetail post with lite adjustments in demention and print on 3D printer.
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