Given the state of lens-correction data these days (eg ACR, Lightroom) that small amount of vignetting (couple of tenths of a stop?) is a complete non-issue. Even minor barrel distortion isn't worth worrying about, but especially vignetting.
Unless you just want something to whinge about. In which case, carry on ... :-) On Thu, Jul 25, 2013 at 7:07 PM, Aahz Maruch <a...@pobox.com> wrote: > FYI, given your requirement for good wide performance, don't pine too > badly for the 16-50, I noticed a fair amount of vignetting at 16/2.8 > > Honestly, given how much you care about the difference between 16 and 17, > I think you might prefer something like the Tamron 10-24 or one of the > Sigma 10-20. Then either suck it up on swapping lenses or get a cheap > used body for the second lens. > > > On Thu, Jul 25, 2013, Zos Xavius wrote: >> >> No use in even posting samples. I think my good copy is now bad. When >> I push the barrel up the upper half gets sharp again, so clearly the >> wobble is hurting sharpness. I think the build quality on this lens >> simply awful. I've tried very hard to baby this lens, but it should be >> able to withstand a knock or two. I guess I send in my bad copy and >> have CRIS tighten that and realign it. I hate spending anymore money >> on this stupid lens, but the range is nice and the rendering and >> sharpness are both superb when your copy is optically good. I dunno. I >> mean I can spend $180 or so at CRIS and have the same issue 6 months-1 >> year down the road. I need something between the 16-40 range and this >> lens was a seemingly perfect fit. The 17-70 isn't great at the wide >> end IMO and the 1mm makes a big difference. The 16-50/2.8 is just too >> much money and I don't need the speed enough to justify spending >> $1000. Not when I could buy a couple of limiteds for that....If this >> lens is this fragile, its gotta be the flimsiest zoom I have ever used >> and that's saying something. Even my el cheapo 28-80 is better built. >> I really don't know what to do. The 2nd copy was a LN- grade from KEH. >> It seemed ok optically at first, but seems worse now than before. I >> liked the lens enough that I needed another copy to replace the first >> while I decided what to do with it and didn't want it missing. My >> 18-55 mk1 just doesn't cut it really and isn't very usable at open >> apertures. >> >> On Thu, Jul 25, 2013 at 10:18 AM, Zos Xavius <zosxav...@gmail.com> wrote: >> > LOL! It might not be that much, but it is noticable... >> > >> > On Thu, Jul 25, 2013 at 9:49 AM, Bruce Walker <bruce.wal...@gmail.com> >> > wrote: >> >> 1/4" of wobble? You must have the special LensBaby co-design version. >> >> Treasure it. :-) >> >> >> >> On Thu, Jul 25, 2013 at 8:52 AM, Zos Xavius <zosxav...@gmail.com> wrote: >> >>> >> >>> I'll take an f8 shot today and upload crops of the upper corners. You >> >>> tell me. My copy looks no better or worse than photozone's test >> >>> samples BTW. Their samples are quite soft in portrait. So is >> >>> dpreviews. My barrel probably has a 1/8-1/4" of wobble to the left and >> >>> right. vertically it feels tighter. >> >>> >> >>> On Thu, Jul 25, 2013 at 3:39 AM, John Coyle <jco...@iinet.net.au> wrote: >> >>> > Zos, you must have either two bad samples or very high standards! The >> >>> > 16-45 I got from another >> >>> > PDML-er (in, I think, 2007) was well used but still gives great >> >>> > images. I used it extensively on a >> >>> > number of overseas trips, and most of the images I got from it were >> >>> > sharp corner to corner: those >> >>> > that were not are probably due to being taken from a moving bus or >> >>> > from the hip... >> >>> > There is no barrel wobble either, so it might pay to have it tightened >> >>> > up after all. >> >>> > >> >>> > >> >>> > John Coyle >> >>> > Brisbane, Australia >> >> >> >> >> >> -- >> >> -bmw >> >> >> >> -- >> >> PDML Pentax-Discuss Mail List >> >> PDML@pdml.net >> >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> >> follow the directions. >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > Hugs and backrubs -- I break Rule 6 http://rule6.info/ > <*> <*> <*> > Help a hearing-impaired person: http://rule6.info/hearing.html > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- -bmw -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
