There is a link to a technical article comparing several popular fisheye
lenses by Coastal Optical that was published a few years ago at my fisheye
page at
http://360vr.com/fisheye41/fisheye.html
Note that there is an aesthetic difference, the Sigma fisheyes creates
prominent star burst highlights compared to the Nikkor which suppresses
them.
With a digital workflow, careful use of unsharp masking will help restore
the look of sharpness in images. My favorite amount is 44/.4/0, can be
applied more than once. For increasing visual contrast without creating
gaps in the histogram, I might use USM 11/250/0 as a final step.
Diffraction will hurt fisheye images at f16 and smaller. Sigma would
perform best at f8-f11.
regards,
Jook
>Message: 2
>Date: Thu, 10 Jul 2003 21:28:15 +0200
>Subject: Re:Fuji S2 & Sigma 8mm Photoshop Action
>From: Hans Nyberg <email@hidden>
>To: Eric Gerds <email@hidden>, <email@hidden>
>
>on 10/07/03 19:40, Eric Gerds email@hidden wrote:
>
>>
>> What aperture / ISO/ shutter are you using for the pictures you posted? Are
>> you satisfied
>> with the sharpness of the images? Do they get much more blurry when you use
>> wider
>> aperture? I am curious how good the Sigma 8mm is. I think Jook uses Fuji S2
>> with Nikon 8mm
>> (perhaps not a fair comparison). Is it true that when you stop down the
>> aperture, you get the
>> sharpest images? Newbie questions, I know...
>
>Sigma 8 mm Fisheye has same sharpness from 5.6 - 16
>However lightfall is different.
>Much at 4-11, almost nothing at smaller apertues.
>http://www.panoramas.dk/d60/index.html
>
>Jooks from the Empire State Building
>http://www.panoramas.dk/ was made at 2,8 with the old Nikkor 8 mm.
>I believe his other panoramas at panoramas.dk are made with it also.
>New Year 2003/1 - BMX pano 2002/ 39 and the Tribute in Light 2002/17
>The lens is difficult to find as it was discontinued around 1980.
>It is very sharp at smaller apertues.
>
>Hans
>
>Hans Nyberg
>commercial photographer
JOOK LEUNG --> email@hidden Panoramic photography --> http://360vr.com
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