Hello all,
I am new to this forum. I am a fine art photographer in Phoenix and teach at Arizona State University. I've been doing some architecture work as of late and have been working with a 65mm Caltar IIN f4.5. According to what I know, this is a Rodenstock badged by Calumet, though the quality control may not be the same.
When photographing a large building, the lens is super sharp in the center and appears to get a bit soft at the edges wide open. With a loupe right in the corner the softness seems to stay until the lens is stopped down to f45, where it almost feels as sharp as the center of the image. This is understandably not a good aperture for such a wide lens. The center looks best from f8-f16. At those apertures however, the edges still appear unsharp. It is difficult to tell on the glass as the corners are a bit dim. I just dropped some film off at the lab shot at f8, f11 and f16. Does anyone have any thoughts on this? I was planning to purchase an APO grandagon 55mm f4.5 but if I can keep the caltar I wouldn't mind saving the cash.
thanks
Mike
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