My experience (sample of one...) is that DA lenses only start to noticeably vignette when the fl gets below about 24-28mm. Likewise, zoom lenses seem to have various difficulties at the extremes of their travel. So my guess is no vignetting but possible softness or other issues. > On 30/07/2026 23:47 BST John Sessoms <[email protected]> wrote: > > > I need some lens advice. I've about decided I need a lens with 250mm > focal length. > > I'm trying to photograph birds through my kitchen window. My guesstimate > is the distance from the front element of the lens to where I've set up > a tree limb as a perch is 155 inches (12 ft 11 in). > > 300mm on the K-1 doesn't have enough field of view, and 200mm has too much. > > Will the SMC Pentax-DA* 60-250mm F4 ED [IF] SDM vignette on the K-1? How > much? > > I've used the DA50 f/1.8 on the K-1 and it didn't seem to vignette at all > > SDM motor problems? > -- %(real_name)s Pentax-Discuss Mail List To unsubscribe send an email to [email protected] to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
