Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?

[svarzaru]

Anyone know how much this lens cover? Searched everywhere and I cannot find a thing. Thanks!

[Dan Fromm]

I b'lieve it is an f/4.5 tessar type. The f/4.5 tessar type coverage rule of thumb is that the lens will cover 115% of its focal length.

On another topic, I recall seeing posts by you, possibly on photo.net, up to perhaps a decade ago. Where have you been, are you well?

[Dave Wooten]

I have a 215 mm that covers 8x10

[Mark Sawyer]

I have a 215 mm that covers 8x10

I'd wager that's the f/4.8 Acuton, a Plasmat design. The 12-inch f/4.5 is a Tessar, a completely different beast.

[Dan Fromm]

f/4.5, Dave?

[Dave Wooten]

Yes

[John Jarosz]

I have a Paragon Anastigmat 12" but it's f 6.3. It covers 8x10. If anyone is interested I can mount it on the 8x20 and measure the image circle.

They made 2 versions? One was f 6.3 and the other was f 4.5?

[JWN]

I have a Paragon Anastigmat 12" but it's f 6.3. It covers 8x10. If anyone is interested I can mount it on the 8x20 and measure the image circle.

They made 2 versions? One was f 6.3 and the other was f 4.5?

I'd appreciate it if you would mount it and let me know the diameter of the image circle. I have seen it mounted to a 7x17 banquet and wanted to confirm the circle would cover. My point being that when I obtain a 7x17 that can be mounted horizontally and vertically, I'll want a suitable lens for it. Thanks! John

[Dan Fromm]

John, they made an f/6.3 Commercial Ektar clone usually sold as Acutar and an f/4.5 jes' plain f/4.5 tessar type usually sold as Paragon. Also a 215/4.8 convertible Plasmat that was sold under many names including Acuton, Ilex Caltar, ...

Usually doesn't mean always. There were no rules in Rochester and no one followed them.

[Mark Sampson]

"There were no rules in Rochester and no one followed them."
To an old Rochesterian that's the best laugh today!
See also Kodak's use of the word 'Polymax'.