30 inch Apo Nikkor vs 30 inch Apo Artar coverage @ infinity?

[Dave Wooten]

760 Artar vs 760 nikor ?

[Dave Wooten]

Reason for post both are currently available, one is in shutter, one is not

[Dan Fromm]

How much coverage do you need? Nikon claims the 760/11 Apo Nikkor covers 583 mm at infinity. Goerz claims the 30"/12.5 Apo Artar covers 575 mm at infinity plus 15%. I'm not as convinced about the plus 15% as I'd like to be.

If 575 mm is more than enough think hard about the difference in prices between them, the cost of putting one of those lenses in barrel into shutter, and how much of a shutter you need. The cheapest way to get timed exposures with a barrel lens is to put it in front of a Packard. If you want shorter expposures than 1/25 or better timed exposures both lenses can, according to SKGrimes, be put in Ilex #5. I think this means they can also be put in a Compound #5. #5s' nominal top speed is 1/50, my Compound 5 does 1/40. The Apo Artar will also go in a Copal #3, but will lose 1/3 stop from f/12.5.

[Dave Wooten]

Thanks Dan
Guess neither will work
Need good solid corner to corner for 10 x 24

[angusparker]

The Nikkor is a lot bigger. Consider the Apo-Ronar CL as well. More info here:: http://www.angusparkerphoto.com/blog...ndations-14x17

[angusparker]

Thanks Dan
Guess neither will work
Need good solid corner to corner for 10 x 24

What's the IC needed for that format?

[Dave Wooten]

A sq + B sq = C sq.
10 x 24
26 inch diagonal = 660.40 mm
I think this is correct

[angusparker]

A sq + B sq = C sq.
10 x 24
26 inch diagonal = 660.40 mm
I think this is correct

Thanks - too lazy to do the math myself. 14x17 is 560mm so this is quite a bit more. By my records the APO Germinar 750mm has over 700mm IC, the Artar 30" just 660mm and the Artar 35" over 700mm. Probably some old Dagor out there that can do it at the wider end as well.

[Dave Wooten]

I have a "ragged" 35 Artar, no retaining ring and the iris stuck about midwayI will mess with that one a bit.

[StoneNYC]

I have a "ragged" 35 Artar, no retaining ring and the iris stuck about midwayI will mess with that one a bit.

If you have that, you can put that in a #5 shutter (that has it's own iris) and be all set.