Heliar 50 f2 vs Hexanon 50 f2 ?

[derekphan]

Hi,
I heard a lot of good thing about the Hexanon 50 f2 and Heliar 50 f2 but how these two compared with each other? Any one have experiences please tell me. Thank a lot.
Derek Phan

 

[chubbyfoot]

I want to know about this too. I heard that haxanon has great sharpness even at wide open. But, relatively heliar need to stop down AV at least 1 stop to be sharp enough.

 

[ampguy]

Yes, the Hexanon 50 is sharp at F2. I have never used the Heliar.