i will check out the close up adapters as well, thanks for the advice  
							
						
					 
							
						
 They do tend to hunt a bit on the 5D in low light, and at close to 1:1 macro it can be a little tricky, but they have a manual switch which limits the amount of lense travel if needed. Apparently on the A700 they focus VERY fast, and hunt not at all. Still a magnificent lens worth every cent. The detail quality of the pictures cannot be beat. Now for a 500mm Mirror.
 They do tend to hunt a bit on the 5D in low light, and at close to 1:1 macro it can be a little tricky, but they have a manual switch which limits the amount of lense travel if needed. Apparently on the A700 they focus VERY fast, and hunt not at all. Still a magnificent lens worth every cent. The detail quality of the pictures cannot be beat. Now for a 500mm Mirror.
							
						

 yes indeed. expensive and rewarding
 yes indeed. expensive and rewarding

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