Originally posted by fikkser Hard pick... The sigma might not be super sharp but according to the internet many are happy With the sharpness.
I mainly use Pentax 16-45, sigma 50-150 hsm ii and Pentax m 50 1,7.
Yes the 1,7 is good for low light shooting, but low light is mainly done indoors in my case. Its a bit long then. I think i'm more in for the sigma, but i'm afraid Its going to be a bad performer. Still the 2,4 is a bit dark... Would need a flash or iso 3200 indoors at winter. Looks pretty bad on k-7.
How is the sigma stoppped Down to like F2?
Excause the iphone auto correction if something Looks stupid.
With normal-bright indoor lighting ISO 400, 1/60 @ f/4 can work well. I've shot (outside) my M50/1.7 at ISO1000, 1/30 wide open and got pretty good results, mind you it was 10 p.m. and candle lighting.
The DAL is one stop slower than the M, but you can go one stop slower in exposure and still get keepers (except when subject is also moving, then it gets difficult). Try and see what exposure you need for the M in your normal indoor lighting and then you can figure out what you need.
All in all, it still ends with what you want. If you want the sigma, go with the sigma. Better get what you want than regret it later.