Xenoplan 150mm 3.5... Mystery Lens...

[Embdude]

Ran across this lens that I have been unable to find any info about...

Jos. Schneider & Co.Kreuznach "XENOPLAN,, 3.5 15cm

Looks to be off a folder of some type.

Can't make out the lens SN but the Dekel compur SN is from 1928-ish

Seems that the Xenoplan name was used post war for small cine/machine lenses.

What do you all think?

239997 239998 239999 240000

[Embdude]

I found it on an evilbay auction here: https://www.ebay.com/itm/385570101328?mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338722076&customid=&toolid=10050

but the details the seller gives are just a complete jumble of lens data from other lenses... My spidy sense says run away... I am not a buyer - but would like to know more about the lens anyway...

[Dan Fromm]

No idea about the lens. Pont dates the shutter's serial number to 1927-8.

[Paul Ewins]

One of many obscure Schneider lenses from the 1920s that show up a few times and then disappear without trace. There are so few of them that based on the last digits alone I think this might be serial number 120745. One of 24, dated 14 Oct 1925 (# 120724 - 120747) which is the earliest mention I could find for any type of Xenoplan. It might just be a different name for a Xenar Type D (which was already in production) to provide a marketing point of difference for a corporate customer.

[arri]

One of many obscure Schneider lenses from the 1920s that show up a few times and then disappear without trace. There are so few of them that based on the last digits alone I think this might be serial number 120745. One of 24, dated 14 Oct 1925 (# 120724 - 120747) which is the earliest mention I could find for any type of Xenoplan. It might just be a different name for a Xenar Type D (which was already in production) to provide a marketing point of difference for a corporate customer.

This is the information I have, first Schneider used the name "Xenoplan" for this three element lens and the later ones got the more famous name "Xenar" with the "D"

A fast lens and is makes fun to use it.

[Embdude]

Thank you, Dan, Paul & arri!

[J. Patric Dahlen]

Seems that the Xenoplan name was used post war for small cine/machine lenses.

The "Lens collector's vade mecum" says that, and has a drawing of a triplet type with an extra meniscus element in the front, but it doesn't look like there is room for three elements in front of the aperture/shutter blades. Count the reflections? If the front component has four reflections and the back component two, then it's a normal triplet. If the front component has six reflections and the back two, then it's a triplet with an extra front element. If the front component has four clear reflections and one weak reflection, then the front group have two cemented elements.