I have 5DII and am thinking of getting back into wildlife. Nothing too fast moving mostly deer, squirrels or birds sitting and not in flight.
Currently have 70-200 F4 and 135mm F2.
Current thinking is .....
Buy a 2x extender and keep current lenses. This would give me 270 at F4 on 135 and 400 at F8 (center point focus but I usually use that anyway) on 70-200.nice and cheap and OK if good light. Reduced IQ.
Or sell 70-200 and buy 100-400 F4.5-5.6 L. Better zoom lens
Or sell 70-200 and buy 400 F5.6L. I then have two primes at 135 and 400 .... Will need to move about to get the right in camera crop. Best IQ.
Your thoughts are appreciated.