F90x doesn't have a 100% finder, nor do any Pentax SLR's. So you can't 
check for vignetting that way (As the fresnel on the focusing screen 
reduces apparent vignetting). I've only found 100% finders to show 
anything approaching an accurate display of vignetting (found that out 
the hard way with a 24mm and a Nikon hood which came with it, the hood 
was for a 35mm but not apparent on the F90x I had at the time).

-Adam


David J Brooks wrote:
> Jaume
> 
> I shot several shots with a F90X and my Sigma 10-20 for dslr.
> 
> I saw no vignetting in the finder, but quite noticable on the contact sheet.
> 
> Dave
> 
> Quoting Jaume Lahuerta <[EMAIL PROTECTED]>:
> 
>> Godfrey,
>>
>> Do you have a film camera available to check if you can see any   
>> vignetting? (at least in the viewfinder).
>> I've heard that the DA40 doesn't show any...
>>
>> Thanks,
>> Jaume
>>
>> ----- Mensaje original ----
>> De: Godfrey DiGiorgi <[EMAIL PROTECTED]>
>> Para: PDML List <[email protected]>; DUG <[EMAIL PROTECTED]>
>> Enviado: martes, 16 de enero, 2007 22:26:29
>> Asunto: Pentax DA70 lens has arrived ...
>>
>> As mentioned the other day, I sold the FA77 lens and made way for the
>> new DA70. It just arrived a half hour ago.
>>
>> A tidy, compact lens, a little smaller/lighter than the FA77. It
>> comes with a collapsible metal lens hood and the usual (for Limiteds)
>> slip-off lens cap. Ugh, I hate those things ... slide out hoods and
>> slip-off caps drive me nutty. Happily, I didn't sell the B+W 49mm
>> screw-in metal, telephoto lens hood I used with the FA77. It's a
>> little deeper than the stock lens hood: I did a few vignetting tests
>> and found none, so that's what I'll use on this one too. I have a few
>> cheap plastic, clip-on 49mm lens caps too. The Pentax bits will just
>> stay in the box with the pouch.
>>
>> The Quickshift focusing mount is wonderful. I like the slightly
>> shorter focal length .. it's more useful to me. The lighter weight,
>> smaller size and Quickshift mount compensates for that 0.7 stop
>> decrease in lens speed. I noticed in my vignetting tests that there's
>> a little falloff at the corners of the frame wide open, cleans up
>> nicely when stopped down a bit. The finish is on par with the FA77,
>> FA31 and DA21 Limiteds.
>>
>> A very nice lens indeed. Now to go take some photographs.
>>
>> Godfrey
>>
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>>
>>
>>
>>
>>
>> ______________________________________________
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> 
> 
> 
> Equine Photography in York Region
> 


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