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4

The focal length stays at 50mm, but the field of view will be that which you would get from a 100mm lens on 35mm film. Depth of field characteristics at a given aperture will be that of a 50mm lens. There are special adapters, called focal reducers or speed boosters, that shorten the effective focal length (like the opposite of a teleconverter). Since these ...


3

I think the lens flare is a side-effect 2 things: simple Tessar lens design, and little or no coatings on the lens elements. There's probably nothing you can do to "accidentally fix" the flare on this lens. (edit: nothing normal, that is. I supposed if you were to have anti-reflective lens coatings applied to the lens elements internally, you'd reduce some/...


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