MicrobeHunter.com Microscopy Forum

I have had the following Zeiss part, catalog number 47 60 29, for a while and have wondered how it is used (picture 1). I know that is for attaching a camera to a microscope and that the camera is attached to one end using the removable flange that is threaded on one end with the appropriate camera mount on the other (different flanges can be used depending on the camera type). This unit also has some kind of lens inside (picture 2). The end opposite of the camera attachment has the standard Zeiss connector so I am guessing it can be attached to a Zeiss cup and a phototube or a different type of Zeiss phototube. I have a couple of questions.
Is an eyepiece needed with this unit?
Can it be attached directly to the photoport opening on the top of the tube head of a Photomicroscope III without a phototube?

Thanks for your help and any information on this unit is greatly appreciated.

Tim

That appears to be an Olympus OM mount,
based on Richard Oleson's "SLR Lens Mount Identification Guide"
https://vintagelens.nl/2018/02/19/slr-l ... rd-oleson/

Adapters are available to convert from OM mount to e.g. Canon EF or mirrorless bodies.

If you have an appropriate microscope,
fire that up, attach this adapter and hold a ground glass (or e.g. wax paper) over it
and see whether the objective image also forms there when eyepieces are focused.
My guess is that its integrated relay lens should suffice....

Hi blekenbleu,

Thanks for your response. Sorry I wasn't clear that I did know as well that the mount was for an Olympus OM camera. I ordered one for the Canon camera so I can check it out. I thought of the suggestion you had for testing if it is a relay lens so I will give that a try.

Tim

tlansing wrote: ↑

Wed Sep 21, 2022 6:48 pm

give that a try

In a darkened room, I use that trick to determine roughly how much extension tube
is wanted for a camera sensor to be parfocal with oculars,
as well as discovering that image size.

Hi Tim,

What you have is a 63 mm objective for the conversion of a virtual into a real image. A real image is one that can be directly projected onto a sensor, film or a projection screen. You need clamping ring 47 60 05 and phototube 47 30 24:




The setup should look like this:



You still need an eyepiece, this is where the final corrections happen in the Zeiss objectives of the 160 mm era. With this setup you will likely improve image quality a lot.

Hi Wes,

Thanks very much for your very helpful reply! You noted that an eyepiece is still needed. What do you recommend/use in your setup? BTW, I have 2 of the 3 things you need for the configuration you show; I am missing the middle one.

Thanks,
Tim

tlansing wrote: ↑

Wed Sep 21, 2022 8:35 pm

You noted that an eyepiece is still needed. What do you recommend/use in your setup?

I use a 10x/18 Kpl-W eyepiece and a 40 mm pancake lens which nicely fills the APS-C sensor of my camera. A 10x/20 is better but I noticed that these produce a purple hotspot that can be annoying.

Zeiss did make better corrected photo eyepieces but they're uncommon and expensive.

Weren't these the S-Kpl eyepieces?

tlansing wrote: ↑

Wed Sep 21, 2022 10:51 pm

Weren't these the S-Kpl eyepieces?

Yes, the S-Kpl W eyepiece will produce superb images.

Hi Wes,

I have another question. Did you parfocalize the sensor on your camera with what you see in the eyepieces? I know that the large phototube can be twisted and thus move the phototube up or down for this purpose. I am also curious whether the tube that fits over it (47 60 05) with the knurled ring can be adjusted up or down to achieve parfocality. Any other information on how you make adjustments to achieve parfocality would be appreciated.

Thanks,
Tim

The camera lens should be focused to infinity. Image focus is adjusted by adjusting the eyepiece position and can be checked by looking through it iwth your eye. Generally it will be in the right position by default.