Som Berthiot Paris Perigraphe 6.8/110

[Ian Greenhalgh]

Hi folks

I just picked up this lens for a tiny sum, and it's a tiny lens in barrel. Som Berthiot Paris Perigraphe 6.8/110 serial number 1084113.

In the Berthiot catalogue I found, this lens is listed for 10x15cm format, so an image circle of 180mm.

It's a late 1950s one, has very pale blue coatings.

It's a 6/2 design like a dagor, I'm hoping it will fit a #00 Compur, if not it will have to be front mounted on a bigger shutter.

Anyone used one of these before?

http://cameramate.com/images/s_05292009_123722-_IGP0148.JPG

[Steven Tribe]

My 90mm is 160643 and certainly not an early one!
This probably holds the record for the longest time in serial production for wide-angled lenses.
A succesful design but the cells are probably too close for an internal shutter.
The early ones were limited to F14 so there has been a redesign, and perhaps the name is all they have in common?
No experience of use as I am apparently not a wide-angled person!

[Roger Hesketh]

Be a nice little lens to use as a slightly wider than standard on quarter plate. You can use it with your quarter plate reducing back. Here is a link to a source for quarter plate film. http://www.lumiere-shop.de/index.php?page=product&info=1666 I should not worry about the scratches on the front element. They probably will not make much difference. The lens has only 4 air glass surfaces and is coated as well so any loss of contrast due to the scratches will be more than made up for by the contrasty nature of the design coupled with the coating.

[Dan Fromm]

Around 1951, not "late 1950s." Starting in 1952 Berthiot serial numbers started with letters. I've never seen a Perigraphe whose s/n began with a letter; this proves nothing, but I suspect production ended in 1951.

The f/14 and f/6.8 Perigraphes are different designs with very different coverages. Both were made before WW-I, see http://trichromie.free.fr/trichromie/index.php?post/2011/01/27/PERIGRAPHE . Claimed coverages in Berthiot propaganda of the late 1940s were around 100 degrees and 65 degrees respectively.

Dagors and Dagor clones were in production continuously from 1892 (Goerz) to 1982 (Boyer Beryl) and after a lapse the design was revived in Schneider's 550/11 Fine Art XXL.

[Ian Greenhalgh]

Lens arrived and it really is tiny. The cells are halfway in thread size between a #00 and a #0 so I've sent it off to have it put into a #0 Compur I had spare.