I currently use a Sigma 50-500mm and am very happy with its performance now that I have learnt at what focal length it is sharp and what it is soft...Also to get the best from it I seemingly have to stop down to f7.1 or f8 and as such struggle for shutter speed.
So I am thinking of getting Sigma 300mm f2.8 and a 1.4 and 2x convertor..(ideally I would love the canon 300mm but its way beyond my budget)
Has anyone used this lense with or without the convertors?
And with a Budget of £1500 has anyone got any other ideas of lenses that would suit me?
I use a Canon 30d at the moment at which can be a bit noisy around the iso 400 range so I am looking for a fast lense so I can keep to about iso 200.