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					Originally Posted by  Moonlighter
					 
				 
				and what aperture does the 100-400 mm have at 300 mm? 
			
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 Its an f 4-5.6 sadly, not straight f4. 
If you're thinking about the 300mm as a 'walk around' have you thought about the 70-300IS? I own this and while not claiming it is up there with the 300, does make for a good tele/walk round, for the few times times I 'need' this FL.
		
 
		
		
		
		
		
		
			
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