Originally posted by norwegianoutdoors
How is the 43mm demanding to use? It's as easy as to pop the camera in auto (if you want to) and the camera will usually stop down to around f4 and you'll get amazing photos.
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Do as you suggest (assume your program line is set to mft or dof) and throw in a busy background and your photo won't look amazing. Or take a picture at f/2 at night of a lit sign that fills the frame. Both on a K-1, easier to do on APSC. Unless you're really crass, the 43 will probably give you 80% day in, day out, amazing? depends where you are, quality of light, subject, and your standard of amazing. To unlock the final 20% you must shield it from its weaknesses and highlight its strengths.
You could do the same as you suggest with the DFA*50 and it'll do it that bit better, more contrast, better colour rendition, sharper across the image plane (especially at f/4), more resolution full stop with less effort.
I have both, love both, the 43 that bit more because I understand it better and I love nothing better than throwing it on a K-1 in M and the AF set to M and going for a wander but that's transcending mere photography and going into a meditative state almost. You can do that with the 43 but not the 50.