Sony FE 28mm f/2 in da lab - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Sony (https://forum.opticallimits.com/forumdisplay.php?fid=14) +--- Thread: Sony FE 28mm f/2 in da lab (/showthread.php?tid=4632) |
RE: Sony FE 28mm f/2 in da lab - JJ_SO - 01-20-2020 (01-20-2020, 11:10 AM)Brightcolours Wrote:(01-20-2020, 08:23 AM)JJ_SO Wrote:(01-20-2020, 06:30 AM)Klaus Wrote: Distortions will not vary between samples in any substantial way. I have no problem to agree on "small differences", I do have a problem agreeing on "no differences". So far no one has ever been so masochistic as to measure the deviations in distortion and chromatic aberrations of several copies of the same lens. This does not have to change. But the assertion that there is no deviation is questionable. "Those who feel healthy have just never been properly examined". RE: Sony FE 28mm f/2 in da lab - Brightcolours - 01-20-2020 The assertion that there must be a noticable deviation, that is absurd. "Nothing is more terrible than activity without insight." RE: Sony FE 28mm f/2 in da lab - x_holger - 02-09-2020 Back to the Sony FE 2/28 .... I owned this lens and sold it, resolution in the outer image field is not good at F2 or F2.8 and there's an amount of LoCAs or even purple fringing at F2 as well. But it's one of the cheapest offerings for native Sony FE (by Sony) so it might be interesting to see some test results given the affordable price. RE: Sony FE 28mm f/2 in da lab - Klaus - 02-09-2020 (01-20-2020, 08:23 AM)JJ_SO Wrote:(01-20-2020, 06:30 AM)Klaus Wrote: Distortions will not vary between samples in any substantial way. An obvious example is zoom lenses - there are slight variations in the zoom stops at the end of the range. I can't really quantify what this means - 0.1-0.2% if we are talking about an ultra-wide lens. I reckon the spacers used for calibrating a lens can also make a slight difference albeit surely less than 0.1%. Please also note that the distortion analysis is the least accurate with Imatest - but that has nothing to do with the lenses, of course. (02-09-2020, 04:16 PM)x_holger Wrote: Back to the Sony FE 2/28 .... That'll be pretty much the verdict. |