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<blockquote data-quote="blueiron" data-source="post: 1426" data-attributes="member: 203">Dave,&nbsp;1. All lenses not marked DX, are by default - FX, since they were designed for use with a 35mm film frame or sensor. The AI and earlier lenses were designed for manual focus cameras like the F, F2 series, F3 series, and all their cousins - FM, FA, FE, etc.&nbsp;2. If I install a DX lens on my D3 and do not do anything else to the menu, it shows a shaded area in the viewfinder and images only the centered 'bright' area. I would suspect that the D700 is the same way. If I set the menu to DX, I believe it shows the same way.&nbsp;3. I have never seen one, but I know there is a mathmatical formula to convert the focal length number. I can't remember it right now.&nbsp;4. I believe that as sensors grow more inexpensive to make, DX will die off and those DX lenses will be 'orphaned' as it were. It is why I no longer consider DX lenses for purchase. Since Nikon is a huge believer in retrofit lenses all the way back to the first F model camera in 1959, I see no reason why they would change now. Nikon has a large following specifically for this reason [myself included] and while bodies come and go, lenses stay for a very long time.</blockquote>

[QUOTE="blueiron, post: 1426, member: 203"] Dave, 1. All lenses not marked DX, are by default - FX, since they were designed for use with a 35mm film frame or sensor. The AI and earlier lenses were designed for manual focus cameras like the F, F2 series, F3 series, and all their cousins - FM, FA, FE, etc. 2. If I install a DX lens on my D3 and do not do anything else to the menu, it shows a shaded area in the viewfinder and images only the centered 'bright' area. I would suspect that the D700 is the same way. If I set the menu to DX, I believe it shows the same way. 3. I have never seen one, but I know there is a mathmatical formula to convert the focal length number. I can't remember it right now. 4. I believe that as sensors grow more inexpensive to make, DX will die off and those DX lenses will be 'orphaned' as it were. It is why I no longer consider DX lenses for purchase. Since Nikon is a huge believer in retrofit lenses all the way back to the first F model camera in 1959, I see no reason why they would change now. Nikon has a large following specifically for this reason [myself included] and while bodies come and go, lenses stay for a very long time. [/QUOTE]

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