I have $500 burning a hole in my pocket. I am really wanting the Sony A-Mount 16-50/2.8, but I thought I would canvas the folks here to see what you'd pick. My camera is a C3. My current lens lineup is as follows. Legacy: FD 50/1.8 FL 35/2.5 FD 28/2.8 FD 35-105/3.5. I have waiting for me to purchase (seller is holding until I can get to the town over): FL 85/1.8 Nikon non-AI 50/2 Bushnell 28/2.8 for FD AF Lenses: 18-55 kit SEL 50/1.8 LA-EA2 with a Sigma 17-70/2.8-4. Lately I have been obsessed with finding one lens to keep on the camera most of the time, hence the interest in a zoom. The Sigma 17-70mm was supposed to be that lens, but I'm not really impressed with it. So... any advice? I mostly shoot indoors, low to not quite bright. The usual subjects: dogs, cats, turtles, birds, and one toddler. Outdoors I have a Crape Myrtle I love to take photos of as well as my Live Oaks. I want to try to photograph the moon as well. My biggest issue with the legacy stuff is that I am not quick enough to photograph moving subjects. I know that takes practice, so hopefully I will get there. The other, final option would be to forego the lens and get a second hand 5N. I briefly had the 5R (it had to go back due to some weird issues), and I really loved the responsiveness and low light performance. Thanks in advance for your help!