Catalogue information for zeiss (modern, I believe)

[billben74]

Hello all,
Apologies if this obvious to some, and just say I have tried a bit of googling myself but didn't get a any joy.

There is a oldish zeiss on ebay (uk) that has a couple of objectives
http://www.ebay.co.uk/itm/carl-zeiss-mi ... SwzaJX8uX2
One objective has following numbers

F -LD 20/0,25
46 06 05
160/2
(Yes I can guess its NA 0.25, flat field with a LD of ??? tube length 160, and designed for inverted? - but I would love to be able to find info from a cataloque to confirm my guess work/find more detial if available)

And a older looking one 10 0,22 with serial number 5000645. (Its Zeiss West Germany)

My question is where does one find out the nature of a zeiss objective via serial number? I know the main zeiss web site has lots of info, but I can only see info for modern objectives.

(I also realise that there is the whole Zeiss Jena etc. but here but I think we need either Zeiss West Germany or the modern zweiss company).

[Charles]

I have an older catalog of Zeiss objectives which does not list the F-LD objectives. From some discussions on the Yahoo Microscope forum of a few years past, I believe they referred to the F series objectives as inexpensive 'school' grade objectives so I don't believe the F = Flatfield.

Spike Walker's site list various objectives and the F-LD 20X is listed there as a LD Achromat with a working distance of 2mm.
http://www.the-ultraphot-shop.org.uk/obj1.htm

[Oktagon]

This ia GFL stand with trinocular head. Whichever way you play it, it is worth 100 pounds with no objectives.


Spend another 150-200 pounds on 4 plan onjectives, and you will h=get yourseld a fine BF scope

[billben74]

Many thanks Charles and Oktagon for your information.

Charles, thanks for the caution about the "F".

Oktagon, I thought it looked like a bargin. Still not sure I actually need it, but at least I know I was correct on that point...

[75RR]

You won't find anything with serial numbers - but you can with catalogue numbers.
This is a pretty useful one: http://www.science-info.net/docs/zeiss/ ... ystems.pdf

Here is some info on the F objectives: viewtopic.php?f=5&t=464&p=2464&hilit
Though none of them have LD on them.

Looking at the Zeiss Standard GFL you linked to, I would ask for some better images.
On ebay, photos are the only way to judge an item.
There is really no excuse for badly illuminated out of focus images.

[billben74]

Thanks 75RR. Lots of good information there, both about the objective and that zeiss catalogue is a gold mine of microscopic detail.