| That 170-500 also has a correction factor of 1.5 to be applied because of the the 400s smaller sensor doesn't it? That means you be getting a 250-750 zoom (1.5 correction?). That's piggin' huge... You'd have to be using a tripod to be getting anywhere near sharp pictures, which takes away the spontaneity a little. Lot of money to be spending if you get a real high proportion of blurry shots...
Modern tele-converters are supposed to be real good and would have to be a lot cheaper, plus lighter. Just a thought...
Darren |