I'm going to have to ask another question....

Would a novice be able to cope with a 500mm reflex lens? I only ask because I could get one for Ł399 (2nd hand) use it on holiday and if it doesn't work out sell it on my return. I've seen some stunning photos on the web but from more experienced people and I know there are issues with strange bokeh. The SAL18250 would then be fine for most of the year.

What are your thoughts? I'm struggling to make a decision - what if the bears, tigers and birds don't come close enough to have their photo taken at 300mm?!