Could the Image Circle of APO-Ronar 300mm/9, cover 8X10 format ?

[Armin Seeholzer]

Do you mean the designated(engraved) f/no or the effective f/no ? For example: The engraved f/22 is not effectively f/22 @ M= 1:1 compared @ infinity.
Thanks too much again.

Hi just say it again and again till everybody knows it!
Some years ago I spoke to mister Wenzel Tech. person at Rodenstock germany and he told me so, all Ronars which are from the company put in a shutter are 1. optimised at 1:20 and they are for all around use inkluding infinity! He also told me that Rodenstock has a new service to optimise them to infinity. And then he told me for a 1:20 optimised one it would not make sence to do a change only to the Barrel ones it would make sence to optimise them to infinity!

Cheers Armin

[jim kitchen]

Dear Thalmees,

I tried that lens on my 8X10 a few years ago, while searching for a great inexpensive pre-owned large format lens at a local camera store, and I do remember that the 300mm Apo-Ronar did not cover my negative properly at infinity. I purchased a clean used 480 Apo-Ronar instead, which performed extremely well...

jim k

[Thalmees]

My observations are: Although the total image circle of my symmar-s lens can cover the whole 8X10 format(Lateral shift applied), it is visually(No loupe) clear that the image quality at corners is really deteriorated compared to the more central area.
This was enough(@ least to me; although very general) to conclude the same on the Ronar lens.

[Thalmees]

Armin Seeholzer; thanks for your comments. This is what I’ve found.
Gene McCluney; Thanks so much. After a little contemplation I agreed.
Dan Fromm; Thanks again. Robust conclusion for TTL exposure @infinity.
Armin Seeholzer; Thanks so much.
jim kitchen; Thanks so much for sharing your experience.