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thanks.

I bought a E.krauss Paris Protar-zeiss 1:9 F82 lens, someone said it cannot be used for 4x5 format, only 6x9? how much the lens image covered?

at this page how to add photo?

It's multi coated.

I've a the lens above mentioned, but I really don't know how it's performance ? 6 elements with 4 group made?
welcom some experienced photographer advances.

from ebay a Ronar CL 800mm/9 but I don't know how to fit the shutter and how long bellows needed?
thanks for advice if who knows well.

from ebay a Ronar CL 800mm/9 but I don't know how to fit the shutter and how long bellows needed?
thanks for advice if you know well.