Quarz LF lenses?

[Ernest Purdum]

I was just looking through an old Zeiss listing and came across this one.

"Quartz-Anastigmat f4.5

Rapid special lens for criminological and scientific photography particularly with ultra-violet light"

It goes on to list two sizes, 12 cm and 25cm. There were also two types; one corrected, and one not corrected, for color. They were mounted in shutters.

In the front portion of the catalog it says:

The objectives of this class transmit not only the visible but also the ultra-violet light down to extremely short wave lengths - about 200mu. (Note - no Greek on my computer.) We make these objectives in two types. One is entirely of quartz and is therefore not corrected for colour; the other contains an additional lens of another material for the purpose of chromatic correction. Both types are supplied with a relative aperture of f4.5 and focal lengths of 12 and 25cm. The objective is corrected in such a manner that it gives the best performance at a scale ratio of about 1:5 and can be used for a field of about 35 degrees. Both types of objective are unsymmetrical anastigmats consisting of three separate elements. In the case of the chromatically corrected quartz anastigmats the center ilement consists of three component lenses."

They also mention a special leaflet.

[Dr Klaus Schmitt]

I was just looking through an old Zeiss listing and came across this one.

"Quartz-Anastigmat f4.5

Rapid special lens for criminological and scientific photography particularly with ultra-violet light"

It goes on to list two sizes, 12 cm and 25cm. There were also two types; one corrected, and one not corrected, for color. They were mounted in shutters.

In the front portion of the catalog it says:

The objectives of this class transmit not only the visible but also the ultra-violet light down to extremely short wave lengths - about 200mu. (Note - no Greek on my computer.) We make these objectives in two types. One is entirely of quartz and is therefore not corrected for colour; the other contains an additional lens of another material for the purpose of chromatic correction. Both types are supplied with a relative aperture of f4.5 and focal lengths of 12 and 25cm. The objective is corrected in such a manner that it gives the best performance at a scale ratio of about 1:5 and can be used for a field of about 35 degrees. Both types of objective are unsymmetrical anastigmats consisting of three separate elements. In the case of the chromatically corrected quartz anastigmats the center ilement consists of three component lenses."

They also mention a special leaflet.

Thanks Ernest,

appreciate that a lot, was not know to me until know. If not too much asked for, I would appreciate a scan of that?!

Thanks, Klaus

[Ernest Purdum]

Klaus, I tried to answer you earlier, but I guess it didn't work, here goes again. My scanner is garbage, but I will take some photos during my next shoot and send them to you.

Regards,

Ernest

[Dr Klaus Schmitt]

Klaus, I tried to answer you earlier, but I guess it didn't work, here goes again. My scanner is garbage, but I will take some photos during my next shoot and send them to you.

Regards,

Ernest

Thanks a lot Ernest, appreciate that a lot!

Cheers, klaus

[Dr Klaus Schmitt]

Thanks for the shots Ernest.

How come my emails to you bounces back ?

Cheers, Klaus

[Ernest Purdum]

Klaus, I have no idea what would causing an email bounce. My email address is ernestpurdum@aol.com. Is that the one you were using?

Best regards,

Ernest

[Dr Klaus Schmitt]

Group,

I was able to auction a Goerz Quartz Syntor 6.8/180mm lens. It looks like a normal Syntor, but has an inscription which reads "Identisch mit Quarz-Anastigmat No. 321244".

Anyone some info on that lens?

Thanks, Klaus

[Dr Klaus Schmitt]

Funny that after so long time I finally found such a lens, and just a few days later also a front cell of that Achromat-Quarz-Anastigmat 1:4.5 f=12cm (thanks again Ernest for the scans!). According to THIELE that lens was made 18.08.1930 in a batch of 25, in total 52 were ever made (2 + 25 + 25), mine was from the last batch. The achromat cell I found was the first ever made of that type on 15.03.1929, in total 11 (1 + 10) were made.

[Dominique Cesari]

S'il vient à point me souviendra
(if I can achieve it, one will remenber of me - an XVI th century motto)
A niece piece to add to your highly regarded collection.

[Dr Klaus Schmitt]

Merci Dominique - a fine motto, I should make that mine!!