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Message: <blockquote data-quote="aroy" data-source="post: 519239" data-attributes="member: 16090">Normally adapting M42 mount lenses for Nikon F mount does not work fully and you will loose long distance (depending on the focal length) range. The reason is the registration distance which is one of the longest in 35mm world. That means that shorter registration distance of M42 mount will not focus to infinity (or much ahead of it).Apart from this the focus is manual and so is the metering. Though Praktika had good lenses, modern Nikon are much better - sharper and faster in general.The only East European  lenses worth using are the Telephotos - 300mm to 600mm and that too in mirrorless bodies.</blockquote>