Beck 12x10 - more infos?

[phomic]

Hello everyone,

I just got my hands on a nice brass lens - R. J. Beck 12 x 10 rectilinear, 16".

135417

I am trying to get some more information on this lens.
It seems like it is very similar or even identical to a Dallmeyer Aplanat, right?
How old may it be?
In which setup would it typically have been used?

I have no inserts (or whatever they are called), so I'll use it wide open. But it came with a flange.
Already made a board from a sheet of aluminium in Technika-size, so I can use it with adapter-boards on my Linhof Kardan 18x24 and on my 4x5 Sinar F2. For the latter I'd need a massive extension for the bellows and rail to focus it. So this is probably not an option.

Michael

[IanG]

Approx 1890 to about 1905, they were used for portraits, group shots and landscapes. It's a fairly typical Rectilinear lens, similar rather than identical to the Dallmeyer lens you can make yourself some Waterhouse stops.

Ian

[phomic]

Approx 1890 to about 1905, they were used for portraits, group shots and landscapes. It's a fairly typical Rectilinear lens, similar rather than identical to the Dallmeyer lens you can make yourself some Waterhouse stops.
Ian

Thanks a lot, Ian!

[Andrew Plume]

Hi Michael

you will (also) be able to obtain longer focal lengths by using either of the elements solely

good luck
andrew

[phomic]

Hi Michael

you will (also) be able to obtain longer focal lengths by using either of the elements solely

good luck
andrew

On the Linhof I should be fine, but on my Sinar I'd rather want the focal length to be shorter, no?
Maybe I just need to get another lens, sigh ;)

Michael

[Steven Tribe]

Patent protection was quite short in the 19th century, so competitors to Dallmeyer appeared in the last decades.

These were made in very large sizes covering up to 20x24". Apart from the uses mentioned by Ian, they were much promoted for copying work - which probably explains why these are often found in larger sizes.

Performance on a par with anstigmatics will require a couple of Waterhouse stops (F16 or smaller).

[phomic]

Patent protection was quite short in the 19th century, so competitors to Dallmeyer appeared in the last decades.

These were made in very large sizes covering up to 20x24". Apart from the uses mentioned by Ian, they were much promoted for copying work - which probably explains why these are often found in larger sizes.

Performance on a par with anstigmatics will require a couple of Waterhouse stops (F16 or smaller).

Thanks, Steven!

Michael