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04-27-2011, 04:17 PM   #1
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Location: nsw
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Can I use nikon lenses on my K-5

I was wanting to use some of my wifes Nikon DX lenses on the K-5 or is this not possible with a proper adapter.

If we bought a new Sigma lense would it be better to buy one with a Nikon bayonet or one with a Pentax one to use on either body. Now I know I should have bought a Nikon body but anyone who has a K-5 knows why I didn't.

04-27-2011, 04:24 PM   #2

Join Date: Feb 2009
Location: Alameda, CA
Posts: 3,198
If the Nikon lens is a G lens (with no aperture ring), even with an adapter or somehow you force it on a Pentax lens, there is no way to control the lens's aperture.

Pre-Ai Nikon lenses, can be attached to a Pentax DSLR body, but can be used only in stop-down mode, inconvenient to say the least.

I think you should buy Nikon lenses for Nikon body and Pentax lenses for Pentax body.
04-28-2011, 08:06 AM   #3
RonHendriks1966's Avatar

Join Date: Jan 2009
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Posts: 8,714
There is an adapter for sale Gadget Infinity :: Digital Camera :: Lens Attachment :: Adapter :: Nikon AI Lens Adapter Ring for Pentax K200D D110D K20D

I have it and use it for an old Nikkor 300mm/f4.5. The adapter works as an TC of something like 1,25x making the lens 375mm/f5.6 so you only should use for a really good lens. Only stopped down and you need an aperture ring.

So nu use for trying some of those new lenses of Nikon, but it looks fun:

So buying a second K-5 for your wife is a good plan.

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