Hello everyone im new to the forum as I have been looking for a good place for advice and this place seems to be full of knowledgeable people
I own a Canon 550d and have recently bought a new lens (Sigma 17-70mm DC HSM)
I say recently but it was three months ago, i just havnt had the time to properly test it out.
I have used it taking pics of the kids in the park and also took some at a family wedding and i was pretty happy with the results.
Today i have been taking some of the kids in the house (close up face shots) and they didnt seem very sharp so i set up a little test for the lens and it seems the autofocus is a bit off.
I put the camera on a tripod and took some photos of some text on a box and then compared them on my pc, first i used normal autofocus, then live view auto focus, then manual focus.
The manual and live view autofocus came out well but the normal autofocus is quite a way off (viewing at 100%)
I also replicated the test with my 18-55mm kit lens and they came out fine so its definitely the Sigma at fault.
I bought the lens through amazon but being that it was so long since the purchase would they do anything about it?
Or my other option is going through Sigma, would they repair it as its under warranty?
Any advice would be appreciated, thanks for taking the time to read this.