Adaptor for Nikon lenses?

Came across this

Anybody used one?

It seems that we can use inferior lenses on our superior bodies!

I can't think of a good reason for doing that.

Would'nt touch it.

although some, yes some Nikkor lenses are good (but not as good as Limiteds or star lenses), the converter does not go flush with the camera body. So Any nikkor lens you use will not go to infinity with this converter. I have a cheap M42 mount and had the same problem, only by getting the flush Pentax M42 converter did I resolve the focussing.

I've not tried it, but apparently Nikon pre-AI lenses (ie. pre-1977) work on K mount cameras without the need for an adaptor or modifications to the lens. The registration difference is about 1mm so the Nikon focusses slightly past infinity but that's no huge deal. Obviously they're "dumb" lenses with no communication to the body but should work much like any other pre-A lens.

So why bother? Because there are a lot of old Nikkor 105mm f2.5 telephotos going very cheap out there. Modern Nikons below the D300 can't use them (how ironic!), they sold by the bucketload and they're generally thought to be one of the portrait lens all time greats.

I've already got the FA77 and the D-FA100 so I'm spoilt, but if I were needing a short tele/portrait on a budget I'd certainly give it due consideration.

The adaptor in the link above uses an optical element to achieve infinity focus, which I'm sure will degrade image quality.

I have a different adaptor which doesn't have an optical element and as a result doesn't preserve infinity focus (it's like a short extension tube). However, it's fine for portrait and longer uses (my Nikkor 200mm focuses to about 15ft away).

Nikon AI lenses don't tend to fit the K-mount directly due to the indexing ridge getting in the way, which is why the pre-AI lenses fit (as they have no ridge). In my (limited) experience though, they don't lock in the mount so you have to hold them in place which doesn't make it practical for me

As Hefty says, there are loads of classic Nikkors out there that Nikon DSLR users can't use - how sad

R

The Nikkor lens mount is smaller than the K mount, so there's no way they will fit directly.

Sorry John, but you're quite wrong. There are several people already using pre-AI Nikkors on their Pentax cameras without the aid of an adaptor. As Reuben points out they won't lock-in so you need to be careful not to drop them.

A Google will bring up some samples (and a lot of discussions) about this but this thread covers most of it and has some lovely examples taken with various Nikkors (55/3.5, 105/4 Micro, 105/2.5) on a K10D.

It's still only worth doing if you (a) have a bag full of old Nikkors or (b) squirm at the prices old Takumars can sometimes fetch.

I rest my case! If they won't lock in, they don't fit....

OK, I'll let you off on a technicality then

I only asked if anybody had used an adaptor!:

Seems the lenses I'm interestd in don't need one.

£24 saved then, any more info?