PanoTools NG:
RE: Samyang 8mm question..please
'Jim Bechtel' mrjimbo2@... 2015-Jun-08 18:15:42
Eric.. Thank you very much.. Yes he going after the maximum horizontal field
of view.... and yes it looks pretty scary from blur.. So one more question..
If he shot the Samyang with FX rather than DX would he get better results
specifically less blur R&L
jimbo
-----Original Message-----
From: #removed# [mailto:#removed#]
Sent: Monday, June 08, 2015 9:24 AM
To: #removed#
Subject: Re: [PanoToolsNG] Samyang 8mm question..please
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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Posted by: "Jim Bechtel" <#removed#>
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