First impressions. I could see a tiny bit of de-centering in my test wide open at 100 meters, but at 3 meters at F4 I could not see the same, so think it's fine.
It does not, contrary to what I thought I read on here, arrive into lightroom with the profile automatically applied. (normally I like leaving the profile correction switched off as I find the vignette correction too high, or that a slight darkening of the corners helps nearly all of my pictures.
What I did notice, is with the correction turned off and photographing a large rectangular window, it has huge distortion, not quite as bad as my 28mm sony, but easily the next worse of my lens to that one.
The way it attached to my a7r3 felt too tight and nowhere near as smooth as my Batis or native Sony lenses.
It is beautiful to hold in the hand, the form factor, focus ring, and aperture ring are as advertised. I'm attaching some quick comparisons with the Batis 40. On the first cactus picture, close up, the Batis smokes it in terms of sharpness, while the Sigma obviously is smoother in the out of focus areas.
This was handheld on autofocus using AF-S - not very scientific I realize.
I brought it inside and photographed a pin taped to the wall using a tripod, manual focus, and 5 second shutter delay. The pin was near the center of the frame at F5. The sigma appears sharper, tho this may be extra focal length. Also worth noting that the color between the 2 lenses is fairly different, I had to subtly adjust in LR to match.
First impressions. I could see a tiny bit of de-centering in my test wide open at 100 meters, but at 3 meters at F4 I could not see the same, so think it's fine.
It does not, contrary to what I thought I read on here, arrive into lightroom, with the profile automatically applied. (normally I like leaving the profile correction switched off as I find the vignette correction too high, or that a slight darkening of the corners helps nearly all of my pictures.
What I did notice, is with the correction turned off and photographing a large rectangular window, it has huge distortion, not quite as bad as my 28mm sony, but easily the next worse of my lens to that one.
The way it attached to my a7r3 felt too tight and nowhere near as smooth as my Batis or native Sony lenses.
It is beautiful to hold in the hand, the form factor, focus ring, and aperture ring are as advertised. I'm attaching some quick comparisons with the Batis 40. On the first cactus picture, close up, the Batis smokes it in terms of sharpness, while the Sigma obviously is smoother in the out of focus areas.
This was handheld on autofocus using AF-S - not very scientific I realize.
I brought it inside and photographed a pin taped to the wall using a tripod, manual focus, and 5 second shutter delay. The pin was near the center of the frame at F5. The sigma appears sharper, tho this may be extra focal length. Also worth noting that the color between the 2 lenses is fairly different, I had to subtly adjust in LR to match.
First impressions. I could see a tiny bit of de-centering in my test wide open at 100 meters, but at 3 meters at F4 I could not see the same, so think it's fine.
It does not, contrary to what I though I read on here, arrive into lightroom, with the profile automatically applied. (normally I like leaving the profile correction switched off as I find the vignette correction too high, or that a slight darkening of the corners helps nearly all of my pictures.
What I did notice, is with the correction turned off and photographing a large rectangular window, it has huge distortion, not quite as bad as my 28mm sony, but easily the next worse of my lens to that one.
The way it attached to my a7r3 felt too tight and nowhere near as smooth as my Batis or native Sony lenses.
It is beautiful to hold in the hand, the form factor, focus ring, and aperture ring are as advertised. I'm attaching some quick comparisons with the Batis 40. On the first cactus picture, close up, the Batis smokes it in terms of sharpness, while the Sigma obviously is smoother in the out of focus areas.
This was handheld on autofocus using AF-S - not very scientific I realize.
I brought it inside and photographed a pin taped to the wall using a tripod, manual focus, and 5 second shutter delay. The pin was near the center of the frame at F5. The sigma appears sharper, tho this may be extra focal length. Also worth noting that the color between the 2 lenses is fairly different, I had to subtly adjust in LR to match.
