SMC A 50mm - which one?

I've seen some of these lenses for sale with various apertures, for example the F1.7 version and the F2. Apart from the difference in apertures does either lens have any particular issues re build quality, etc?

Regards

Rob

Ihave the 1.7 and I love it!.......bought it for £40,in pristine condition,it's a beautiful lens ,great colour rendition and beautiful contrast............I've had no problems with it at all on the K20D!...

They are all v. good
Some prefer the Bokeh of the 1.4 as it has 8 blades in the iris. the 2.0 and 1.7 have 6 and can give quite pronounced hexagons on oof highlights.

OTOH the 2.0 & 1.7 apparently have a flatter focus field and so are better for macro if put om extensions or a bellows. They are also rather cheaper secondhand.

I've had M versions of bosth 1.4 & 1.7 and liked both The As are optically the same. I don't have the 1.4 any more as I have the F1.4. Still use the 1,7 on my Super A

There is, of course the 1.2A which is rather heavy & expensive (and quite soft wide open, which rather ruins the point) and the 2,8A macro (which I also have) wich is a realy useful lens if you don't need the faster apertures