300mm f2.8 is one the best Canon's lenses probably second only to 200mm F 1.8 (Personal opinion, in term of IQ).
If you need mobility 300mm. Though heavy, you can easily use it off the hand and may be with a monopod.
If subject is beyond the reach unless optically eg. surfers in middle of occean that you can not get any closer to them unless optically, and setting up a station with heavy tripod can be arranged ahead of time, with no hassel, then 600mm F4 (If you can afford 500 F4, you must be able to go for 600 at same F stop that is much nicer but not significantely heavier).
F 2.8 is a big plus if you picture UK or anywhere that light could be an issue. You cannot replace that added F stop benifit in any way from F4 longer focal lenght brothers, but with right crop, when maxing the ISO in acceptable level, you still can have that otherwise impossible shoot.
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S a s s a n .
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"No one is going to take our democracy away from us. Not now, not ever.
" JOE BIDEN
Last edited by sassan; 09-10-08 at 17:47.
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