dagimage2
Member
I recently picked up one of these lenses for a decent price, and the test shots so far look pretty good, but it's got a lot of dust inside, which I think is contributing to veiling flare in some conditions. I've just noticed that the front of the barrel can be unscrewed fairly easily, and it looks like the front element would come with it. So I'm wondering if I can just unscrew that, blow out the dust, and screw that back in -- or if that might cause problems with focussing or anything else. What are the risks in doing this? Is there any place I can find proper instructions on how to clean this leans?
Also -- while we're on the subject: I've noticed that the images I take with it can have vastly different color casts (using auto WB on an RD-1) based on just the smallest difference in the angle of the light on the scene, or if I close the aperture 1/2 stop while everything else remains the same. Has anyone else observed this? Any ideas why this might be?
Thanks.
Also -- while we're on the subject: I've noticed that the images I take with it can have vastly different color casts (using auto WB on an RD-1) based on just the smallest difference in the angle of the light on the scene, or if I close the aperture 1/2 stop while everything else remains the same. Has anyone else observed this? Any ideas why this might be?
Thanks.