[Brightcolours]

Finally I am selling my tokina 16-28f2.8 it's a great sample however heavy and bulky.

I am considering Sigma 20mm f1.4 instead so what do you think?

What I think? That that makes no sense at all.

 

You are someone who does not see the advantage of big apertures (which is fine, just noting that). So the f1.4-ness is lost on you (and you have a 5D which does not excel in focus accuracy with that lens at f1.4 I bet).

 

You want to get rid of the Tokina 16-28mm f2.8. Why? Because, as you state, it is "heavy and bulky".

In exchange for what? The Sigma 20mm f1.4.

 

Weight of the Tokina: 950 grams. Length of the Tokina: 133mm. Width of the Tokina: 90mm.

Weight of the Sigma: 950 grams. Length of the Sigma: 130mm. Wight of the Sigma: 91mm.

 

Yeah, really, That makes no sense at all. The exact same weight and bulk. To exchange the 16-28mm focal range for a single focal length.