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WTB URGENT: Pentax K -> Nikon adapter (D90)
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PostPosted: Fri Jun 11, 2010 12:01 am    Post subject: WTB URGENT: Pentax K -> Nikon adapter (D90) Reply with quote
new, used or well abused doesnt matter - as long as it still works, its good


PostPosted: Fri Jun 11, 2010 5:29 am    Post subject: Reply with quote
a-mount --> b-mount
works for infinity if register(a) - register(b) >= 1-2mm

in your case:
Pentax-K --> Nikon-F
45.5mm - 46.5mm = -1mm

so only macro would be possible....

(why do we have a sticky for that if no-one reads it...??)


PostPosted: Fri Jun 11, 2010 6:03 am    Post subject: Reply with quote
Some Nikon users are familiar with the Nikon F register distance and those of other mounts.


PostPosted: Sat Jun 12, 2010 8:11 am    Post subject: Reply with quote
kds315* wrote:
so only macro would be possible....

(why do we have a sticky for that if no-one reads it...??)


Because adapters with corrective optics are available?

Because some lenses have adjustable stops for infinity focus?

Because some users actually want to use the lenses for macro?


PostPosted: Sat Jun 12, 2010 8:49 am    Post subject: Reply with quote
Scheimpflug wrote:
kds315* wrote:
so only macro would be possible....

(why do we have a sticky for that if no-one reads it...??)


Because adapters with corrective optics are available?

Because some lenses have adjustable stops for infinity focus?

Because some users actually want to use the lenses for macro?


a) yes, adapters with a "barlow lens" are availble but the quility is not good and the focal length will be times 1.2

b) most likely not (at least I never found a lens I could adjust that much and I doubt that the OP that that in mind...)

c) that surely is a point, but I had mentioned that it works for that.
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