PanoTools NG:
Re: Kenko fisheye lens...
Uri Cogan 2009-Jan-12 21:06:31
Ken Warner wrote:
> Does anyone know anything about Kenko fisheye lenses?
> It's an old lens. Manual focus, manual apeture 5.6-22.0.
>
I actually have one, I bought it about 40 years ago, with a Nikon adapter.
The lens screws like a filter over an old Nikon "normal" 50mm lens (52mm
thread) and with a "magnification" of 0.16 it converts its focal length
to 8mm.
It has an aperture ring but no focus. The "normal" lens must be wide
open, at F1.4 or F2.0, and its focus set to infinity. It will yield a
round fisheye image on full size sensors, but will chop the sides off on
my D80 (very similar to the Sigma 8mm).
So I dug it out of my junk pile, mounted it, with the old 50mm lens on
the D80, and took it out for a 4-exposure hand-held pano shot outside my
studio. Processed all 4 shots in PTGui with no trouble, and created the
pano in Pano Converter. The lens is very soft with poor focus at the
edges, and has tons of CA and puple fringing. I imagine it's images
could be improved a bit in Photoshop, but I decided to create a panorama
using uncorrected images. The fact it is a foggy day did not help...
See that panorama (for the next day or so) at:
http://www.uricogan.com/kenko
Uri
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