NEX 7 + Sigma 19mm
Do you find that they're both really slow to start? I mean, when you turn it on for the first time. I like the shots I get from my 30mm but the delay is terrible (at least 2x as a slow as Sony lenses). I'm missing shots because of it. I'm wondering if the 19mm is any quicker.
I have found that my 19mm attached to my NEX7 does start up a bit slower as you have noticed. Maybe a full second longer. Don't know why though. But I manage to half press the shutter when I think I am going to shoot most of the time to keep it up and running at that moment when I need it. As far as focus speed, it's pretty much spot on when I need it. I just need to get quicker on the focus point when I am using the flex focus placing it in different locations on the frame. In all though, I like the size, weight, finish, and the edge sharpness of this lens...The pictures shown here look good and I am sure the OP is liking this lens just as I do.
Vaughn T. Winfree
'Dance like no one is watching. Sing like no one is listening.
Love like you've never been hurt and live like it's
heaven on earth.' --Mark Twain
'See what the camera see's. Let the lens interpret what can be. Capture a moment in time telling a story.'--Vaughn T. Winfree