
Originally Posted by
Sheiky
probably you're better of cropping your image taken with a 300mm prime than buying a lesser quality zoom.
Is that based on speculation or evidence? (I'm not attacking you: it's perfectly okay if it is speculation. But if it isn't, I would like to know what evidence you're basing this on.) It is rare for a lens that is that much longer to do worse than a cropped shorter one (that's speculation [img]/emoticons/emotion-1.gif[/img]).
If the Tamron really is worse than a cropped 300mm f/4, then I agree that the 300mm f/4 is preferable.