unless a 400mm lens is simply inadequate. my most useful birding combination is an A* 400/2.8 with the AF 1.7 extender on an *istD. it is adequate for many things but it's doing these kinds of shots where i have some notion of having the A* 1200/8. birds across water aren't easily approachable.
Herb... ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, August 23, 2004 9:46 AM Subject: RE: longer lens (was PESO: Journey's End) > A 300/4, 300/4.5, or 300/2.8 is probably the sweet spot in terms of getting the > most for your money. Many see a 300/2.8 as a smart choice because with > teleconverters it becomes a 420/4.0 or 510/4.7. > > Last time I checked, KEH had two or three Tamron SP 400/4 lenses for $700 to > $900. By starting at 400/4, you can use a TC to get a 560/5.6. > > I see no point in spending big bucks for a 400/2.8, or even a 600/5.6. It's > cheaper to buy an ist-D and turn a 300/2.8 into a 450/2.8.
