next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Canon EOS (https://forum.opticallimits.com/forumdisplay.php?fid=11) +--- Thread: next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART (/showthread.php?tid=245) |
next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - Klaus - 06-24-2017 It started promising ... but then it ended in ... perhaps not. http://www.opticallimits.com/canon_eos_ff/1012-sigma1224f4art next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - JJ_SO - 06-24-2017 excellent cliffhanger! "but then...* ^_^ "the the borders" next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - JJ_SO - 06-24-2017 Thanks for your test and findings. We obviously didn't have the same lens and I tried it only less than half an hour, but I thought I was seeking for flares, ghostings, fringing and all the stuff I knew from the Nikkor - and I was positively "disappointed" not to find these, at least not in a all too obvious way. But maybe I was too careful? When looking at my pictures in the range of 18-24 mm I could not see fiel curvature - but then, the idea occurred when the subject is perspectively, that curvature might even help to increase DoF? Edit: I was looking at your 7 sample pictures and hoping to find some "ghostings" to proof of curvature. Not to defend the lens - I just want to know what it looks like your were talking about? next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - Rover - 06-24-2017 Ew... Looks like an f/4-5.6 lens after all. But I guess for many people it'll be practically a 12mm prime anyway. (but then, the distortion... ZOMG) P. S. No 21MP results this time around? next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - Brightcolours - 06-24-2017 There are no 18 or 24mm sample images (except a leaf close up), so a bit difficult to look for the field curvature there... next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - Brightcolours - 06-24-2017 Quote:Ew...For prime, I'd rather look at the Irix 11mm f4 instead next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - davidmanze - 06-24-2017 Very good real world review, especially given the detailed info on the lens's field of curvature which causes a little "mayhem" at the longer focal lengths, most reviews mention nothing of that genre.
I'm not sure if a compromise setting, (putting the focus point at the 1/1/3rd of the way from the frame edge) would help ease the corner/ edge situation, probably? Huge lens though and heavy at 1.15 Kgs....this is a lens you can get round by using two lighter primes or a prime and a zoom, there's the Samyang 14mm F2.8, (one stop brighter for peanuts for example) On a trip this lens would be a pain to carry coupled added to your standard kit! next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - Rover - 06-24-2017 Quote:For prime, I'd rather look at the Irix 11mm f4 insteadNo AF, no sell for me (YMMV of course). I'd like to see a 12mm AF prime from someone to replace my 14mm Sigma (which is not stellar in itself, albeit passable, but also comes a little too close in the FL department to the 16-35mm lens that I call my bread and butter unit...) Tamron, I'm looking at you. next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - Brightcolours - 06-24-2017 Quote:No AF, no sell for me (YMMV of course). I'd like to see a 12mm AF prime from someone to replace my 14mm Sigma (which is not stellar in itself, albeit passable, but also comes a little too close in the FL department to the 16-35mm lens that I call my bread and butter unit...)Klaus mentions that the Sigma tends to overshoot AF? next PZ lens test report: Sigma 12-24mm f/4 HSM DG ART - JJ_SO - 06-24-2017 Quote: Actually, I would like see some evidence how it looks like and how big's the impact. 7 samples are not a lot, I was scrolling through 48 pictures (less than an hour? ha! 20 minutes - so really nothing to call it a test) and simply could not see these problems in real world. But I realized I have less high expectations on sharpness as there is so much to be seen on the picture - I simply didn't bother enough to see the structures of leaves close to the lens' ∞ position. Although I tried the lens, I also think of looking at the Irix would be worth to do. As for lack of AF: I haven't tried a DLSR-body (so far) which had no troubles to AF these UWA reliably. Apparently the grass is not much greener at the Canon side of the hills, and I think there are not much subjects in UWA situations which are moving so quickly. Personally, I don't see the value of PDAF in that region to be a ,must have'. |