soheilkh

It might sound crazy to compare a prime lens with a zoom lens. I'm just wondering if any of you have experience with both lenses so can tell me how different the lenses (at the same focal length) are. I'm wondering if the sharpness, vignetting and distortion are different or not. (I know the 60mm lens is one stop faster at the same focal length)

Just received this lens bought used on eBay. There's a mark on the rear element. you can see on the picture it is way bigger than dust specks. I tried to clean it wih no success. I couldn't figure out what it is and it's on the inner or outer side of the element. It's very bright under the sharp light. Maybe it's fungus? it's located on the top of the lens element and I assume it is outside of the 6x6 frame and doesn't impact the picture. Also I checked the picture in the viewfinder and I don't see any sign of it on the picture. I'm gonna shoot a test but I'd like to know what you think. Thanks! Do you know what is this mark? Do you think it affects the picture due to the location on top of the lens?

The cracks are only on the curtain's coating and not on the inner material. I don't understand how it can fall in piece. and how it can cause jamming. I think these cacks are on the coatings and caused by the age. My question is how they can affect the pictures if you have any experience in this case.

I just bought a hasselblad 501 CM in a mint condition from eBay. The camera looks almost unused but after inspecting I noticed there are three cracks on the auxiliary shutter of the body. (picture attached) Do you know what caused them and if they are serious defects and can affect on the camera operation or pictures?