Rodenstock Grandagon 75/4.5 for 6x12, 6x17?

[buggz]

Hello,
Would this lens be a good choice for a 6x12 roll film back on a Sinar F2 4x5?
I am thinking of getting a 6x17 back also.
What are the differences between an N model of this lens and the non -N model?
Would this lens require a center filter?

Yes, I have searched, and searched, but I get conflicting information.
I just thought I'd ask the experts here.

[StoneNYC]

I can't answer the differences part, but I owned a Grandagon 75mm 4.5 -N "green stripe" version.

It worked fine on 4x5 so I don't see why it shouldn't work fine for 6x12, and although it doesn't quite illuminate 5x7 images because of the corners, I suspect you should be able to get away with using it for 6x17, however you'll most likely have light falloff toward the edges. I would do the math on the listed image circle and that should give you a good idea, sorry I sold mine so I can't check.

[Dan Fromm]

The Rodenstock brochures you want are here: http://1drv.ms/12OFqc2

[Steve Goldstein]

Dan, thank you for posting these.

[IanG]

It'll be fine for 6x17 but it won't work (focus) with the extension type backs needed to convert a 5x4 camera to use 6x17. You may need a recessed board on the Sinar to ise a 75mm anyway for 5x4 and 6x12.

Ian

[Dan Fromm]

Dan, thank you for posting these.

Thank you, sir. There are more: http://1drv.ms/1w0vbMD

[buggz]

Great information, got the Rodenstock brochure information, now to read it.
Thanks!

[buggz]

Hmm, would a 90mm be better?
I really don't know how wide I need, nor want.
Thinking of panoramic vistas, or something...

It'll be fine for 6x17 but it won't work (focus) with the extension type backs needed to convert a 5x4 camera to use 6x17. You may need a recessed board on the Sinar to ise a 75mm anyway for 5x4 and 6x12.

Ian

[Lachlan 717]

90 has historically been the "standard" wide lens for 6x17cm. It is quite wide, but not stupidly so (i.e. you rarely have to worry about getting tripod leg(s) in shot!)

The widest lens that reports as being sufficient to sharply cover 6x17cm (nominal) is Schneider's 72mm Super Angulon XL. Bit of a tricky lens to use, but worth the effort if you see the world this wide!

[Carsten Wolff]

I have occasionally used the 75mm f/4.5 SW-Nikkor on 6x17....pretty tight. On paper it has a slightly larger IC than the Grandagon. I mostly use 90 to 108mm in 6x17 wide.