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Old Nov 2, 2006, 4:29 AM   #1
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Does anyone know if there is any significant difference between this lens and the SMC-FA or D-FA version? Is it worth getting, or should I look for the FA instead? Any comments on this lens or images captured with this lens would be greatly appreciated. Thanks!
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Old Nov 2, 2006, 5:19 AM   #2
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http://www.bdimitrov.de/kmp/give you the technical specifications for all K-mount Pentax lenses, bodies and accessories ever produced. There are some subjective comments on the F/FA 50 mm 2.8 macros as well. They are the same lens with one exception, the FA has a manual focus clamp that some find useful.

http://stans-photography.info/contains user evaluations of nearly all Pentax K-mount lenses, unfortunately the F 50 mm 2.8 is one of the fewexceptions. It's mentioned under the A 50 mm 2.8 and the FA 50 mm 2.8 though. The comments on the FA israther extensive.

Together these two web sites form thePentaxian's Holy Book, this is where any research on Pentax K-mount lenses starts. Enjoy your reading, don't forget about everyday chores as washing up and taking out the garbage.

Kjell
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Old Nov 2, 2006, 7:22 AM   #3
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ALL 50 f2.8 Macros are tack sharp and excellent The FA-50 (F-50 is assumed identical)has a flare problem w/ ring flashes and very dark central objects surrounded by very bright light. I'm still keeping mine though. The A-50 does not have this problem but no AF of course. The D-FA "fixed" the problem w the FA....
I bought a d-FA 100 to compliment them. Don't own the D-FA50 but reported to be one of the best in class macros and would have bought it except I wanted the working distance of the 100...
The flare problem seems to have to do w/ the bright imaging of the aperature diaphram due to some sort of light bounce from sensor to back of the lens and then back to the sensor..maybe....and/or mostly.
At present costs (w/ rebates) the D-FA 50 is the recommended one.
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Old Nov 2, 2006, 7:38 AM   #4
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Just an "overview" of the fa-50 as a "normal" lens.




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Old Nov 2, 2006, 7:46 AM   #5
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I know I should not worry abou this, as it has already happened, but I purchased a SMC-F 50mm 2.8 Macro for $100 on ebay. Was this a fair price?
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Old Nov 2, 2006, 7:58 AM   #6
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Very. I paid $170 for the FA-50 used
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