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11-06-2009, 01:00 AM   #16
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again

One can find more information about the image quality of the two lenses here,
Pentax Lens Gallery

Here is some commentary which I personally find quite useful.
Alex's Library: Photo Tips

11-06-2009, 08:16 AM   #17
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QuoteOriginally posted by yyyzzz Quote
One can find more information about the image quality of the two lenses here,
Pentax Lens Gallery

Here is some commentary which I personally find quite useful.
Alex's Library: Photo Tips
Hey, I like these links. Thanks. Oh, and bump?
11-06-2009, 04:34 PM   #18
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QuoteOriginally posted by yyyzzz Quote
The two seem to produce somewhat different images, becuase they have different optical designs. I do not think that you can use technical charts to sufficiently tell the differences. Lens is not only a technical item, also a piece of art.

However, if one does want to focus on resolution as the criterion, I can say that the resolution is quite close and the f1.7 edges out the f1.4 ever so slightly at the largest aperture. Again, I do not think resolution should be the only criterion. Thanks for the interests.
I don't think that the F and FA are that different from each other at all optically speaking. if I may say this, the FA is a rebadged F50 1.7 and has an improved AF. although I see more F versions being sold around than the FA.
11-08-2009, 12:53 AM   #19
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Agreed

Yes. There are more F 50mm f1.7 being sold. But becuase of the age, the condition of the lenses sold varies quite a bit.

I do not own the FA version of either lenses. So I have no way to compare the AF speed. I use my M 50mm f1.4 as a comparison point for the image quality. It should have the same optical formula as the FA 50mm f1.4.

11-08-2009, 03:44 AM   #20
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PM received

Thanks. PM received.
11-12-2009, 05:14 PM   #21
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Thanks. PM replied.

Thanks. PM received and replied.
11-15-2009, 09:38 PM   #22
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PM sent regarding 50mm.
11-19-2009, 01:59 AM   #23
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Replied.

Replied. Thanks.

11-19-2009, 05:36 PM   #24
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A different version sold pending on funding

A different version of the lens is sold pending on funding.
 

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