More advice please

[dans]

You lot have all been great and i hope im not pestering to much my next question is do i go for a pentax 16-45mm f4 or a sigma 17-70mmf2.8 these are 2 lens i can afford althou there are probable better but its somthing i can up grade to it the future once my skills get better

Thanks once again Dan

 

[arclight]

Performance wise, I don't think there is much to choose between them, Dan.
Check out the reviews on the Pentax forum:-

http://www.pentaxforums.com/lens_reviews.php

The Sigma has a wider max aperture and a longer reach.
The Pentax has a macro capability although the shortish focal length means you need to go very close to your subject (not handy if it is a living thing).
On the basis of the image quality being eachy-peachy I'd opt fot the Sigma because it has a longer focal range and is 1 stop faster.
Hope this helps.

 

[Mike.P]

I have had both .. the 16-45mm is the better lens plus constant aperture is always nicer imo. It also focuses suprisingly close.

The Sigma does have the advantage of extra reach but given the choice I would pick the Pentax every time.