Originally posted by letomuaddib For whatever it's worth, the newbe me also agrees with the spirit of
RiceHigh's comments, if not the form (his website is a pure bash of
Pentax with almost nothing positive to say about a brand that has many
positives.)
I think we're not doing ourselves much of a service by ignoring problems
such as AF and exposure and keep blaming the user (in the exposure case
at the very least that's the usual response I see.)
...
PS: Much of this is based on me not having heard of a good reason to
underexpose pictures pretty badly (sometimes my histograms are all
cramped in the left half.) If, for some photographic reason this is
a good thing I would like to know (though I still think it caused
more than one user to return his Pentax for a refund because of "dark
pictures and it's not smart to push users into seeing noise problems
even at pretty low ISO speeds because of underexposure.)
There are many good points in your post. But we should note:
1. all AF systems, even by CaNi suffer under adverse conditions (low light). The degree of reliability seems to be directly proportionial to the price of the camera. Thus a D700/900/3/EOS 1D... seem to offer much better AF performance than a K20. They cost several times as much as the K20.
If you compare within the K20's price range, you will find as much complaints about AF performance as with most other cameras.
2. FPS is surely a topic, that was with Pentax forever. People complaint about the low FPS of the PZ-1/PZ-1P or the MZ-S (I did complain myself, but there are other merits, which warranted to invest in Pentax). The only Pentax cameras that ever reached the "magical" 5 FPS rate, considered by many to be the sign of professional performance, were the MX and LX bodies with their motor drives.
So my simple guess is: Pentax engineers and marketing people simply have another view on the performance parameters of their cameras and NEVER consider FPS to be an important parameter for a Pentax. We could all know that. If somebody really needs a higher frame rate, he should buy different.
3. Exposure: That is something I cannot quite understand myself. Over all my K20 is quite reliable, especially when I take care of the situation and apply the necessary exposure correction. But what really annoys me is the exposure fluctation that is evident, when taking several shots in a row of the exact same scene. I often do that to make sure I get a sharp shot, when I use longer exposure times. I then find single expsoures within a series that are between -1/2 and -1 EV darker, than the rest of the series.
I have no explanation for that, but a certain unreliability of the exposure system. The PZ-1P or all of the old analog cameras with center weighed expsoure measuring where more reliable, in my experience, but ofcourse needed more exposure compensation in many situations. - But at the end of the day, less than 10 % of my shots are affected and in many cases can easily be corrected.
4. Most of the examples of badly underexposed images in different forums, often accompanied by bitter complaints, I have seen so far where indeed not the results of the above described erratic expsoure system, but the result of shooting into the light with bright skies, even the sun, right in the picture. That this leads to heavy underexposure, which cannot be fully recoverted should be self-evident to any photog, except the point-and-shoot-users. So I won't chime in, into the bashing of the Pentax expsoure system, even if it needs some improvement.
Ben