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<blockquote data-quote="480sparky" data-source="post: 440286" data-attributes="member: 15805">There's more to it than just the physical mount.&nbsp; Nikon's F mount is a smaller diameter than most other cameras.&nbsp; This means any adapter must move the lens away from the focal plane in order to mechanically attach the lens to the F-mount.&nbsp;&nbsp; Then there's optics to take into consideration.&nbsp; A measurement called flange-to-focal-plane distance is important.&nbsp; That's the distance behind a given lens it's designed to focus at.&nbsp; Each manufacturer is different.&nbsp; Since most lenses are designed to focus in a shorter span than Nikon, mechanically adapting a lens will cause it to lose the ability to focus at mid-distances to infinity.&nbsp; Fine if you're planning on shooting macros, not so fine for portraiture, sports, wildlife and landscapes.&nbsp; The addition of another lens element or two can correct the focus issue, but then you start to lose image quality.And NONE of the adapters will communicate fully with the camera.My advice:&nbsp; Let Pentax shooters use Pentax lenses, Canon shooters shoot Canon lenses, and get yourself some proper Nikon lenses to shoot with.</blockquote>

[QUOTE="480sparky, post: 440286, member: 15805"] There's more to it than just the physical mount. Nikon's F mount is a smaller diameter than most other cameras. This means any adapter must move the lens away from the focal plane in order to mechanically attach the lens to the F-mount. Then there's optics to take into consideration. A measurement called flange-to-focal-plane distance is important. That's the distance behind a given lens it's designed to focus at. Each manufacturer is different. Since most lenses are designed to focus in a shorter span than Nikon, mechanically adapting a lens will cause it to lose the ability to focus at mid-distances to infinity. Fine if you're planning on shooting macros, not so fine for portraiture, sports, wildlife and landscapes. The addition of another lens element or two can correct the focus issue, but then you start to lose image quality. And NONE of the adapters will communicate fully with the camera. My advice: Let Pentax shooters use Pentax lenses, Canon shooters shoot Canon lenses, and get yourself some proper Nikon lenses to shoot with. [/QUOTE]

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