enquiry

From: Copepod (copepod_at_blueyonder.co.uk)
Date: 07/19/04 

Date: Mon, 19 Jul 2004 07:58:36 GMT

I have been given the instrument described below.

I anyone able to tell me anything about it. Age

Manufacturer's name : Ernst Leitz
                                 Weitzlar
                                 Serial No.: 430313

It has a binocular head. The eyepieces are missing.
4 objective turret with 2 Lettz objectives with markings as follows:
16mm Apo A=0.30 12:1
8mm Apo A=0.65 24:1

These are not the usual markings on an objective. Is anyone able to explain
the?

The condenser is intact and seems a complex one with two irises and a
supplementary lens at the top which can be inserted or removed by rotating a
knob on the side of the condenser.
Why Two irises? The control lever for one moves along a scale, and the
other is controlled by rotating a ring with one cursor marking on it. No
scale though.

Any suggestions, explanations gratefully received

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