Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
Anyone know how much this lens cover? Searched everywhere and I cannot find a thing. Thanks!
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
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?
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
I have a 215 mm that covers 8x10
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
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?
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
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.
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
"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'.
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
Quote:
Originally Posted by
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?
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
Re: Circle of coverage for Ilex Paragon Anastigmat 12"/305mm f4.5 ?
Lessee now. 7 x 17's diagonal is around 467 mm. A 305 mm lens that covers 467 mm covers an angle of a bit over 74°. You're asking a lot of an f/6.3 Tessar, if that's what you meant.