>>>> while normally desirable may not be quite as needed as they once were
>>>> because the high ISO performance is getting to be so good.
>>> True, but regardless of how high you can go in ISO, if you have fast
>>> glass you will always have an advantage over slow glass. Yes, the high
>>> ISO performance of the K20 will mean a K20 & 5.6 lens will do what
would
>>> need a 2.8 lens on the K10, but a K20 & 2.8 lens will be better again.
>>> Whether that translates into faster shutters for better frozen motion,
>>> or whether it translates into lower light shooting is up to the owner,
>>> but regardless, they are still better off with the fast glass.
>>
>>
>> Correct for the "Pro" shooters but for the "average" shooter they will
do
>> just fine.
> yup, which is why the Pro's tend to mainly use Nikon & Canon, but for
the
> "average" shooter, Pentax will do just fine. Long fast glass is about
the
> only hole in the Pentax line up though. They cover wide-angle through to
> moderate telephoto better than pretty much any other system. All depends
> on what you want to do with it.
>>
And I guess for that reason most Pentax users are not users of long glass
although there are quite a number using Bigma and the like to good effect,
I
do know of a few that have the 600mm F4 though.
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