Ayoul
Offline
• •
Upload & Sell: Off
|
 p.14 #3 · Sigma 35mm f/2 DG DN Contemporary Review | |
j4nu wrote:
So, what's your overall impression of tracking in AF-C?
There is an ongoing debate here that all Sigma stepper motors are bad (significantly worse than Sony native lenses) at tracking (so the whole I series).
There were also people returning the lens because it coulnd't keep up with their kids. On the other hand, when I had it, I didn't notice any major AF slowness (and managed to take snaps of my kids with a similar success rate as Sony lenses), but I didn't really test tracking (e.g. multiple shots of something coming towards the camera)...
Honnestly, I think that the af-c looks good enough. I've been pleasantly surprised by the AF speed, accuracy and silence of the Sigma 35. It may be slightly slower than the Samyang(s) that I returned for a tilted focal plane, but it's perfectly usable. Honnestly not significantly worse than my Zony 35 1.4. (When I bought it a few years ago, despite its flaws, I was impressed by the speed and silence of its AF).
It may just be a tad less accurate at short distance when taking still subjects, but it may just be my imagination.
But before I took the picutres of this cat, I never took any challenging subject moving toward me with it. I may have been lucky but it did the job very well.
Precision : 99% of the time I use af-c with small flexible spot, in fact like a good old DSLR, without real time tracking. I think that it hurts a little bit the accuracy of AF sometimes. I turn eye/face af on or off depending on the situation. It can hurts accuracy as well sometimes. In dim light and backlight, face AF looks sometimes more like a hair-around-the-face AF than anything else...
EDIT : you know what, she came back while I was writing. I've tried tracking again, this time with animal eye-af and real time tracking. The weather is good and there is plenty of light (3 pm here in France), so, why not. In this good light it works well, very well, even at short distance where it starts to be more challenging.
3 pictures and a crop :
The 2 first pictures are perfectly focused on the eye. Trust me on this. The third one, I'm not sure. I give you the 100% crop :
The fur above the eye is not sharp, which is not surprising given the DOF at this distance. The eye itself, I don't know, I had to raise the exposure on it to see something, but it still looks decent to me. But it t has to be THIS close for the AF to be challenged. So, my guess is that for slow moving subjects at close distance (let's say a kid playing gently inside the house with a proper light), it's good.
However, I don't know how it behaves for fast moving subjects at greater distance, or in really dim light (the same kid jumping around your swimming pool at nightfall could be another story, for instance).
Edited on Apr 08, 2021 at 08:10 AM · View previous versions
|
So I might not need the 1.4 of the GM. We will see...
I had "best" in it, but replaced it by "most".
