Oh well agree its all down to chance really. Reason why i asking is that if there is a higher probability of the whales being further than nearer most of time....then i wont bother with the long glass. Some more IMO on boat w/o len stabiliation and long lens...not a good combo...hmm.
wow.. where are you going for a whale shoot? sounds like it will be an amazing experience!
from what i saw on discovery channel, they use zoom lens such as 70mm-200mm but the lens must be fast, say, f2.8 and above for best effect as the boat will be rocking/moving a lot while the whales will move pretty quick.
also, lens with VR, IS will not help you at all due to the 'rockiness' of the boat.
yah... if your camera is weather proof that is the best, if not, some plastic bag wrapping or underwater casing will help protect your equipment.
i believe a wide-angle lens would do juz fine.. Do bring along a circular polariser as it will do u great help. coz u're out shooting in the seas.. but depending on which time of the day u're shooting as well..
and REMEMBER to clean all ur eqpt after the shoot or at the end of the day. coz u'll really gonna need dat...
i was on a whale watching trip last year... Sydney..
brought my sigma 70-200mm and a 2x extnder...
thats quite good enough..
and to be honest... the most important thing is to pray for the whales to turn up.. and with an attitude to wanna be notti
so they will hump and breathe....