Quote:
Originally Posted by DamianJ
Right. So when you said the expensive lenses do things the cheaper ones don't you were joking!
I see, sorry, missed that.
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A lens that is designed to such extremes as a F1.2 lens is not "better" it does somethings better. It lets in a little more light.
And the there is a cost to that, its weight and the difficulty in making it perform as an easier to design F2 lens. Also lens performance at first increases and then decreases as you stop down, so your f1.2 would have the best resolution and contrast at say f2.8 / f4 whereas the f2.8 lens would perform best at f5.6 / f8 a better stop for everyday use.
At f16 or f22 quality may fall of badly (if it has these stops). The using ND filters changes the colour and the back focal distance.
There are very few poor lenses but a lot of poor photographers. As I say there are good photographs and I can't remember saying good photo except for the lens quality.
I believe a few dollars reading the right books will save you a few thousand at the shop.