Hi everyone,
(I hope at least some of you are enjoying the holidays already!)
As I mentioned in earlier posts, I am shooting architecture with a Linhof Techno view camera, a Leaf Valeo 22 back (36x48mm sensor) and a Schneider Apo-Digitar 5,6/35mm.
Lately, I realised that rising more than 10 mm with the Digitar 35 gave me a strange corner effect: the image became quite blurry, and there was a notable amount of halo in contrasty areas (a sample image and a 100% crop are attached).
So, I sent the Digitar to Schneider Kreuznach, with a very detailed description of that problem and some example files.
They told me that the copal leaf shutter was misaligned and had to be changed, the service cost € 660.-, which is about 1/3rd of the price of the lens.
After receiving the serviced lens I repeated the test shot and, alas, the corner sharpness and halo had not increased in any way.
Now Schneider says that my lens is in perfect condition after the service, and there's nothing they can do about my problem.
The test shot was done with f8 and a rise of 15mm, which does not exceed the 90mm image circle in any way (i calculated that the upper corners are still within an 84mm circle).
So, do you think that this is just something I have to live with, or is the lens faulty?
thanks for your input,
geb
(I hope at least some of you are enjoying the holidays already!)
As I mentioned in earlier posts, I am shooting architecture with a Linhof Techno view camera, a Leaf Valeo 22 back (36x48mm sensor) and a Schneider Apo-Digitar 5,6/35mm.
Lately, I realised that rising more than 10 mm with the Digitar 35 gave me a strange corner effect: the image became quite blurry, and there was a notable amount of halo in contrasty areas (a sample image and a 100% crop are attached).
So, I sent the Digitar to Schneider Kreuznach, with a very detailed description of that problem and some example files.
They told me that the copal leaf shutter was misaligned and had to be changed, the service cost € 660.-, which is about 1/3rd of the price of the lens.
After receiving the serviced lens I repeated the test shot and, alas, the corner sharpness and halo had not increased in any way.
Now Schneider says that my lens is in perfect condition after the service, and there's nothing they can do about my problem.
The test shot was done with f8 and a rise of 15mm, which does not exceed the 90mm image circle in any way (i calculated that the upper corners are still within an 84mm circle).
So, do you think that this is just something I have to live with, or is the lens faulty?
thanks for your input,
geb