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11-10-2007, 06:43 AM   #1
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smcp-fa 50mm 1.4 vs A50 mm 1.7

i have k10d and have two 50 mms. one of them is m 50 1.4 and the other one is a 50 mm 1.7.
i really love both of them... but sometimes i feel the lack of autofocus....
k10 has its own autofocus, but as far as i know it can focus on only the center point...(if we turn the focus ring in the af-s mode)for example the picture in the link, the old man is not in the center and as you can see, my manual focus was not perfect in this picture....

iyi on Flickr - Photo Sharing!

if i sell my A-50 mm 1.7 and buy an smcp-fa, would i do something wrong?
i heard that iq of A50 1.7 is one of the best in its class. do you think smcp-fa 50 1.4 is superior or inferior in terms of iq to it ???(i use 50 mms for indoor portraits)


11-10-2007, 07:58 AM   #2
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Hello Halil,

That's a nice portrait!

With the K10d you can select which point is to be sharp. I thought there were eleven spots in the viewfinder you could choose, so the man on the right can be in focus with that lens, too!

Cheers, Syb
11-11-2007, 04:46 AM   #3
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No with an A series lens you can only have center point as it is a manual focus lens. If you autofocus and select focus you need a f or later lens. FA50 1.4 is a good lens.
11-11-2007, 06:00 AM   #4
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With those lenses you are talking about "focus confirmation", not "autofocus". ("Focus confirmation" means the green hexagon light tells you the focus is correct. "Autofocus" means the camera adjusts the focus with a motor).

You can still use the focus confirmation with your old "A" lenses for photos like the one you linked. Just center on the old man, focus while looking for the green focus confirmation light, then move the camera to the left to recompose the scene.

11-11-2007, 06:34 AM   #5
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I really like the FA 50/1.4for portraits, because the autofocus is so much faster than manual focusing. Both are exceptionally sharp lenses, so choosing between them is like asking which model of Ferrari is faster.
11-11-2007, 02:37 PM   #6
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finn, mike cash, djm and syb, thank you very much. i think i should sell my "A" and buy the "FA" one....
11-11-2007, 03:45 PM   #7
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And if you do so: take a little time to find it below 200 US$ on fleebay. I recently saw one pass on 143$ (IIRC) in very good to mint condition.

Good luck!

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