Am I a gearhead? You bet!
As far as I remember, I have mentioned at least one time that I want to buy a Sigma 20/1.8 lens, and today I couldn’t resist any more. Hmm … that’s a very interesting lens and it is exactly what I was looking for, only better 🙂
On my Nikon D200 it is equivalent to a 30mm lens. Not terribly wide, a little less than my Nikon 18-200 on its widest, but it is the fastest wide lens money can buy. Or is this the widest fast lens?
So this is obviously a lens that’s good for available light shooting. But that’s not why I’ve bought it. Its minimum focus distance is only 20cm (7.9 inch, and that’s not to the front lens, that’s to the sensor plane), and its diaphragm has nine blades. What this means? Bokeh!
On wide-angle lenses, bokeh is normally not a factor of interest. You don’t shoot below f8, frequently above, and you want everything sharp, from very near to very far. With most wide-angles you can go near, but what if you can go very, very near? Suddenly there is depth of field again, and the nearer you go, the shallower it gets. Combine this with f1.8 and nine blades. Creamy 🙂
This is some old piece of cast iron that someone has used as decoration in the garden of the house where I live in Vienna.