Sigma 24 1.8 or 20 1.8?? Pekka help

[clkgtr37]

I was wondering if anyone could suggest one or the other. I am leaning toward getting the 20 f/1.8 but would be open to comments.

www.blairbunting.com

[Pekka]

20 is good, I have done several good photos with it. But It has quite noticeable barrel distortion so my choice now would be 24. After all difference between 20 and 24 is only couple of steps backwards :)

[clkgtr37]

What is the difference between these 2 lenses besides the 4mm? I noticed one has Macro and the other has RF.

[Pekka]

"RF" is Rear Focus which means front element does not rotate - it does not rotate in 24 either so I don't know what is the real difference.

"Macro" is there perhaps because 24 focuses 2 centimeters closer than 20 :)

http://www.sigmaphoto.com/html/fixed.htm

[clkgtr37]

kinda funny how they title their lenses differently when both have pretty much the same features :)