I’ve got a Tamron 70-300, but I fancy upgrading, and image stabilisation would be handy. I like that it’s compact too.
I saw this: https://www.ebay.co.uk/itm/Canon-EF…ve-optics-5652/333894084937?campid=5338728743
Three questions,
i) is it a worthwhile upgrade from the Tamron?
ii) what sort of money should I bid?
iii) WTF are Diffractive Optics.