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PostPosted: Thu Mar 14, 2019 8:38 pm 
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A while ago I acquired a Zeiss Photomicroscope III and after a bit of cleaning and alignment it became a pleasure to operate this finely built scope. Its equipped with Planachromat, Neofluar and Apochromatic objectives including phase contrast ones. I tested the internal 35 mm camera with crystals under polarized light and the image quality is stunning. I am now hunting for soil protozoa and hopefully will have some photos to post soon. I am very interested in hooking a digital camera to it but I don't know know where to start so if you have experience I'd be happy to hear from you.


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PostPosted: Thu Mar 14, 2019 8:46 pm 
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Location: NorthWest England
That's a handsome beast, Wes

MichaelG.

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PostPosted: Thu Mar 14, 2019 9:03 pm 
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Welcome Wes,

beautiful monster you got there.

You will need a phototube: https://www.ebay.co.uk/itm/Zeiss-47-30- ... SwhfRcFT9e

and a read through these pdfs: viewtopic.php?f=15&t=882

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PostPosted: Thu Mar 14, 2019 9:11 pm 
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Thank you MichaelG. and 75RR for the kind replies and information.

Wes


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PostPosted: Fri Mar 15, 2019 1:03 am 
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Location: League City, Texas
I'm jealous too. :mrgreen: What a beautiful uber-classic optical machine!

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PostPosted: Fri Mar 15, 2019 2:20 am 
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what a beautiful heavyweight. Nice complement of objectives too. What does that actually weigh?


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PostPosted: Fri Mar 15, 2019 3:23 am 
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Location: Dallas TX
Nice to see the images on real film!

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PostPosted: Fri Mar 15, 2019 8:03 am 
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Hi Wes,
congratulations to your nice new microscope! It is really nice to see someone actually using the built -in camera that made these microscopes a best seller. It seems to have been lightly used and well cares for. The obectives seem to be a mix of Zeiss West, Zeiss Jena and Leitz, but as far as I can see they match quite well.
I recently came to a Photomicroscope 1, second version after 1961 in very nice condition and have read what I could find about these nice instruments.
They were a big seller: From 1955 to 1985 55000 were sold of these expensive instruments. They appear Zeiss-like overengineered but in fact they were really good at what they were bought for: Reliable quality microphotography.
I talked to a guy who has cared for research microscopes as his profession from the 80s on. He reported that the Zeiss Phomis were always preferred for photo work over Leitz Orthoplans and the like because they were so dependable and the image quality was great. He told that Zeiss has further improved the image quality from model to model which makes your model the star of the line. The arm of the stand is coated with dust-removal grease from the inside. To maintain the very best image the internal optics have to be serviced occasionaly. Some people say that there are just too many glass surfaces it the light path to allow quality photograph. This is not true, if you follow the light path in the availabe diagrams you can see that the light that hits the film has not been through more glass surfaces than in other micro photography setups using projectives or eyepieces and a camera lens.

To adapt a digital camera you can use the upper port. The Phomi 2 and 3 had settings to have all the light to the top port or some to the top port and some to the bino tube. I haven't tried it but I think that the top port is like the head of a basic Zeiss Standard so you could put an inclined mono tube there, a 10x KPL eyepiece for glasses-wearer, a pancake (flat design) camera lens and a camera. For APS-C a 40mm pancake like the Pentax M 2,8 / 40mm does fit nicely.

Bob


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PostPosted: Thu Mar 21, 2019 2:23 pm 
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apochronaut wrote:
what a beautiful heavyweight. Nice complement of objectives too. What does that actually weigh?

The microscope is around 30 kg and the transformer weighs about 10-15 kg. Moving it around requires a bit of effort for sure.

MicroBob wrote:
I haven't tried it but I think that the top port is like the head of a basic Zeiss Standard so you could put an inclined mono tube there, a 10x KPL eyepiece for glasses-wearer, a pancake (flat design) camera lens and a camera.

You can redirect all of the light (or 50%) through the top port and I have an inclined mono tube + the 10x Kpl eyepiece. What would be the intermediate element connecting the eyepiece to the camera lens?

Here are a couple of phase contrast images of a spirochete and a ciliate from a soil sample. The background appears grainy probably due to the light diminutive nature of phase contrast. Bright objects on the other hand appear fine.

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PostPosted: Thu Mar 21, 2019 3:01 pm 
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Quote:
... I have an inclined mono tube ...
A dedicated phototube is best as they are both vertical (cope better with camera weight) and are height adjustable which helps fine tune parfocality with the binocular eyepieces.

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PostPosted: Thu Mar 21, 2019 5:20 pm 
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75RR wrote:
A dedicated phototube is best as they are both vertical (cope better with camera weight) and are height adjustable which helps fine tune parfocality with the binocular eyepieces.


The staight tube has no additional optics as an advantage. The disadvantage I see is that the camera towers in quite some height and the display and controls are difficult to see. With a camera like a Canon 600D this is less of a problem because it can be controlled by a PC software very well.

I use a Pentax Q7 and a Nikon 1J5 as micro cameras and control them with the camera controls or a simple Nikon App. For me it is better to have the camera well in view.

The connector between microscope tube and camera lens looks like a funnel, it sits outside the tube and offers a filter thread to connect the camera to. Usually it is necessary to assemble some adapter rings and perhaps a machined element.

Bob


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PostPosted: Thu Mar 21, 2019 5:54 pm 
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These are my camera adapters. One (grey) with a non correcting Zeiss Jena eyepiece, one (brass) with a Leitz Periplan correcting eyepiece. They fit both cameras. Image quality is good but not the best that is available. But it is a light an portable solution. The adapters are made from PVC round stock and a piece of brass installation material. I turned them on the lathe. A filter ring glued to a 3D-printed part would do too.

Bob


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PostPosted: Thu Mar 21, 2019 9:12 pm 
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I see now, making a connector element custom tailored to your particular microscope+camera setup does seem like a very reasonable solution. I thought there is an endless selection of connectors and finding the right one would be difficult to say the least.


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