AFAIK, stop down can reduce vignetting for all lenses.
C.H.Ling
----- Original Message -----
From: "Komtanoo Pinpimai" <romerun@xxxxxxxxx>
>
> The vignett will appear when the F number is small right ? (in fisheye?)
>
> On 1/27/06, C.H.Ling <chling@xxxxxxxxxxxxx> wrote:
>>
>> It is absolutely not the quality of ZD8mm, either flash or PS was used on
>> their shot. Here are some photos I took with E-1 and ZD 8mm. Processed
>> with
>> PS CS2 no vignetting correction done.
>>
>> F5
>> http://www.accura.com.hk/P1201881s.jpg
>>
>> F5.6
>> http://www.accura.com.hk/P1212081s.jpg
>>
>> F8
>> http://www.accura.com.hk/P1212048s.jpg
>>
>> F6.3
>> http://www.accura.com.hk/P1212091s.jpg
>>
>> C.H.Ling
>>
>>
>> ----- Original Message -----
>> From: "Moose" <olymoose@xxxxxxxxxxxxxxx>
>>
>> > Komtanoo Pinpimai wrote:
>> >
>> >>http://image.xitek.com/photo/200512/1393/139317/139317_1135703164.jpg
>> >>http://image.xitek.com/photo/200512/1393/139317/139317_1135695236.jpg
>> >>
>> >>the center seems to be brighter and more colorful, are they
>> >>photoshopped ? or the fisheye can produce these kinds of result ?
>> >>
>> > All super wide lenses produce images that are darker at edges and
>> > corners than in the center. It's a consequence of the physics of light,
>> > the details of which I used to understand. It's worse wide open and
>> > usually disappears by mid aperture, maybe f8 or so, depending on the
>> > particular lens.
>> >
>> > I know ZD lenses are supposed to pass on info about their vignetting
>> > characteristics to the camera and into the RAW files. It can then be
>> > corrected in one or another or both of the Oly RAW apps. Maybe in other
>> > RAW processors too?? It can also simply be corrected in a good image
>> > editor, using one's eyes and a radial gradiant, rather than info from
>> > the lens.
>> >
>> > Moose
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