Musoman
PETE - Nikon/Sony Shooter
Musoman, you stil have the Sigma 150-500? Can you compare the images from SW 80 vs. Sigma at 500mm, f7 on the same subject in similar conditions?
The 150-500 Sigma is on Ebay and it finishes tonight, so i cant do a direct comparison.
I have some previous photos i took with the Sigma for a kind of comparison
A lot of these in my link were with the Sigma.. some @ f8, which is close enough
http://photo-sharing.winsoftmagic.com/1/5bysjpbd.htm