Quote:
Originally Posted by RexK_Cozumel
You might want to check on the price of the 1.4 as opposed to the 1.8 I know for nikon there is a big price difference between the two. That being said the 50 is a nice lens cause it is cheap but really depending on the size of the rooms you are thinking about shooting in the 35mm might be better suited for your purposes. I am sure the image quality of both of them are pretty good.
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Pentax doesn't currently make a cheap 50mm f/1.8. But their f/1.4 is cheaper than Nikon or Canon's and just as good.
To answer the original question, though, the answer is "it depends".
35mm will give you a nice "normal" focal length, good for all sorts of general photography. 50mm on a 1.5× crop sensor ends up being a very nice close portrait length. You probably really want
both, actually.
Just to throw some more confusion into things: the DA 40mm f/2.8 Limited is also a beautiful lens. One or two stops slower than the above lenses, of course, but it's nice and sharp wide open.
Additionally, there's a new 55mm and 30mm on the lens roadmap — the 55mm for this summer and the 30mm in the unspecified future (next summer?). These are ★ lenses, which means they'll have ultrasonic focus motors (SDM) and weather sealing. The max aperture for the 30mm isn't known yet, but it's presumed to be fast. Probably these will be expensive, but worth keeping in mind.