10.5mm fisheye transformations

I have 3 questions about the 10.5mm fisheye when it is used with the

Capture 4 software to perform fisheye to rectilinear transformations.

1) There are 2 transformations available --- after the transformation

what are the resulting images equivalent focal lengths? For instance,

are the results similar to a 14mm lens on a 35mm film camera?

2) How is the image quality after the transformation? Particularly,

is there a lot of degradation in the corners? Is the resulting image

up to professional standards?

3) How do the 2 transformations compare in terms of coverage and

quality?

I know I have seen some discussions of this lens but I can not seem to

find this information in the database.

Thanks for any help you can provide --- cheers

I have not used this particular combination but I have done full frame fisheye transformations with a 16mm fisheye Nikkor on film using panotools.

The lens has a 180 FOV on the diagonal and when I transform it to rectilinear the HFOV is about 145 degrees.

The transformation may result in unacceptable distortion at the corners depending on subject matter and your standards. Think about painting a circle on a rubber canvas and then stretching the corners out (way out) until the circle becomes a square. The corners have been stretched and the software must interpolate the pixels. The line which formed the circle would be uniform width but when it is stretched to form a square the line at the corners will be thicker. For some subjects - such as architecture - this may be unaaceptable but for tothers such as landscape or abstracts it might not matter.

Be certain however that the results will not be identical to using a rectiliner lens.