PanoTools NG:
Re: Samyang 8mm question..please
Erik Krause erik.krause@... 2015-Jun-08 17:24:18
Am 08.06.2015 um 13:47 schrieb #removed# [PanoToolsNG]:
> I have a friend that just acquired the Samyang 8mm fish eye. He is
> not stitching the images to make panos. He is using a Nikon D3100
> camera which is DX.. OK so now my question.. He's using freeware to
> un wrap the images I am noticing that both the right and left sides
> of the image are quite soft and the center is sharp. Also the top and
> bottom are sharp but as you move towards the R&L sides of the image
> start getting soft. I'm thinking this is in the software he's using
> or his process.
I assume you mean the unwrapped images and landscape orientation.
Furthermore I assume unwrapping was done to the maximum horizontal field
of view. In this case unsharp R&L sides are to be expected. The image
sides have to be stretched heavily in order to map the fisheye
projection to a rectilinear one. Using an 8mm fisheye on a DX sensor as
an ultra wide rectilinear lens means to throw away more than 3/4 of all
sensor pixels and stretch the remaining ones which inevitably causes blur.
Erik Krause
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