My Microscopes: Leitz DIC with Zeiss Standard Microscopes

 

Leitz Differential Interference Contrast (DIC) with Zeiss Standard GFL

Method of fitting Leitz ICT Substage Condenser to Zeiss Standard GFL substage

 

Leitz ICT Substage Condenser

For use with Leitz ICT objectives to give differential interference contrast. This was obtained as "scrap" together with the mounting fork that had been sheared off the original Leitz microscope substage in an unfortunate accident.

Fitting Leitz DIC to the Zeiss Standard 16

The big problem you first encounter if you want to use the Leitz ICT components on a Zeiss microscope is that the substage condenser is a completely different size and has a different mounting arrangement to the Zeiss condensers. I solved this for the Zeiss Standard GFL (see above), but the Standard 16 is a different problem.

Eventually, after much thought, I obtained a second substage mounting ring and designed a modification to allow the Leitz condenser to be mounted. I do not have engineering equipment such as a lathe or milling machine, but my Father has a lathe, and his neighbour, Reg (aged 90 at the time, in 2007), has milling equipment. Reg very kindly agreed to do the mods. Here are the results:


This is the unmodified Zeiss mounting

Here is the modified Zeiss mounting, as a sketch:

Here it is in the flesh, in situ:


and again, with the condenser in position:

Finally, here is the complete set-up with Leitz ICT objectives fitted:

This is a much more satisfactory arrangement than the earlier GFL modification. The analyzer is situated in a Zeiss intermediate tube and is a home built polariser using some polarising material purchased at the Quekett Microscopical Club.

The camera shown is a Canon Powershot G9 mounted on a Zarf Enterprises adapter and with provision for on-board flash via a "Y" fibre optic feed. The other leg of the "Y" takes the main illumination.

I have since dispensed with the intermediate tube and have fitted the polariser directly in the mounting ring for the trinocular head. I also now use a Canon EOS 500D DSLR instead of the Powershot and use a separate Vivitar flash instead of the on-board flash. See my pages on flash photomicrography for more details.

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