Link? --- Dario Bonazza <[EMAIL PROTECTED]> wrote: > Hi folks, > > Here is a white-wall shot taken with the DA* 50-135 @ 135mm F2.8, > where it > shows its highest light falloff at corners: > www.dariobonazza.com/public/Vignetting.jpg > > Do yo have any idea about how to measure that? I mean, how to > translate > Photoshop values (around 130 for each RGB channel at center, around > 80 at > corners) into f/stops? > > Thanks to anybody enlightening me ;-) > > Dario > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above > and follow the directions. >
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