Hi all
Could the Image Circle of APO-Ronar 300mm/9, cover 8X10 format ?
My lens is labeled SINAR Rodenstock APO-Ronar 300mm/9 MC on the front cell.
Rear cell has no engravings at all(but has Rear mount diameter of 37.5mm). Its on Sinar DBM board.
While the IC is 264mm(@ f/22) as stated by both SINAR and Rodenstock, the lens is capable of much more IC than claimed. The lens(being on f/9 and focused @ infinity) can tolerate up to 6cm (roughly) of lens standard shift sideways with equivalent displacement up or down.
http://www.prograf.ru/rodenstock/lar...en.html#table1
When I compare it with Schneider Symmar-S 210/5.6, the later showed full coverage of 8X10 format(actual dimensions of my 8X10 images: 245mmX195mm & 313mm Diagonal) but much less tolerance to displacements(roughly 2.5cm only @ f/5.6). The IC of the Symmar-S is 294mm @ f/22(30mm wider than that of APO-Ronar).
http://www.schneideroptics.com/info/...5,6-210mm.html
Is it possible that IC of some kind of lenses(like the APO-Ronar) will not go much wider @ f/22 compared to the IC at maximum lens aperture ? compared to other kind of lenses(like the Symmar-S) ?
While this can be appreciated ! Why the IC of my APO-Ronar is much much wider than the diagonal of my 8X10 format ???
Did I forget any thing here ? Can any one describe what’s happening ?
Appreciate every contribution.
Thanks so much.
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