- Joined
- Jul 31, 2006
- Messages
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Nice! What was the f-stop? BTW, you seem to have Newton rings (most visible in full-size version) from an apparatus that shall not be named.Super Ikonta III w/ Novar. Tri-X in D76 full strength.
I don't understand your statement "lower contrast sharp"? The later, better coated triplets I've had/have are every bit as contrasty as lenses with more elements. The Zeiss Novar and the Zeiss Triotar on the Rollei B35 are perfect examples. Contrast is right up there with any Tessar I own and sharpness too when stopped down a couple of stops. I would imagine that if there were a "Super-multi Coated" triplet it would be even better yet. Reading what you right several times I'm beginning to think you are referring more to the "out of focus" areas, which do look softer and thus have a look of lower contrast.Triplets have this lower contrast sharp yet nicely soft in OOF effect. I love them!
I don't understand your statement "lower contrast sharp"? The later, better coated triplets I've had/have are every bit as contrasty as lenses with more elements. The Zeiss Novar and the Zeiss Triotar on the Rollei B35 are perfect examples. Contrast is right up there with any Tessar I own and sharpness too when stopped down a couple of stops. I would imagine that if there were a "Super-multi Coated" triplet it would be even better yet. Reading what you right several times I'm beginning to think you are referring more to the "out of focus" areas, which do look softer and thus have a look of lower contrast.
I have an ICA Icarette 6x9 folder from the twenties with a f6,8/105mm Novar. (ICA was later merged to Zeiss) I once tested it with USAF 1951 targets. At f12,5 this lens resolved all the lines = 88 line pairs/mm maximum in the center. Which was at the same level with my best modern 35mm prime lenses! In the corners the sharpness was something else, of course. Stopping down the sharpness fell in the center and rose in the corners. None of the later Novars on my Zeiss folders were this sharp in the middle. (I really ought to put a roll through it again, at this time there's plenty of light available outdoors.)
Never tested the Novar mounted on my Ikoflex but apart from a "light" coating, I have no complaint.
One thing to keep in mind: the lens is only 1 part of the optical equation. Poor film flatness like wrong lens register are optical performance killers, much more than the alleged flaws inherent to a triplet compared to more sophisticated designs.
I have an ICA Icarette 6x9 folder from the twenties with a f6,8/105mm Novar. (ICA was later merged to Zeiss) I once tested it with USAF 1951 targets. At f12,5 this lens resolved all the lines = 88 line pairs/mm maximum in the center. Which was at the same level with my best modern 35mm prime lenses! In the corners the sharpness was something else, of course. Stopping down the sharpness fell in the center and rose in the corners. None of the later Novars on my Zeiss folders were this sharp in the middle. (I really ought to put a roll through it again, at this time there's plenty of light available outdoors.)
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