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01-10-2008, 01:33 AM   #1
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FA & F lenses

I'm a beginner with Pentax. What's the difference between F and FA lenses?
Thank you, Eugene

01-10-2008, 01:50 AM   #2
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It is here:

See here:

Pentax K-Mount Lenses and Lens Accessories
01-10-2008, 01:55 AM   #3
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F lenses don' t transmit the focus distance set.
F lenses don' t transmit their MTF values.
F lenses are grey, FA lenses are black.
F lenses have a smaller focussing ring.

That's it AFAIK.
01-10-2008, 02:11 AM   #4
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And this helps also,

Pentax Lens/Camera Compatibility - Mark Roberts Photography

01-10-2008, 06:00 AM   #5
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F series' build quality is known to be slightly superior than the latter FA lineup. There's also a rumour that F lenses are somewhat better optically.
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