Originally posted by stormtech I don't know why, but seeing those figures made me contemplate. We seem to be talking about trying to match the IQ of our DA*/FA* 300 lenses in a 400mm+ configuration. It just hit me that with most of the suggestions here, there is such a big dollar investment to get from 300mm to 400mm.
This has taken me back a step to try to figure out how to get closer with my 300mm...........
Yeah ... the whole idea is to get a longer each without having to sell the kids.
Also, I did mention in the earlier posts, and the title reflects the query, that I wanted to get to 500mm.
With this set up (Canon), I wonder that with the addition of a 1.4 - 1.5X TC if the IQ loss would be such that it would make no sense to do it.
400mm is still quite a bit more reach than 300mm though,
Lots of things to ponder.
JP