From: Sam L
On Tue, Apr 6, 2010 at 6:16 AM, Carlos R <[email protected]> wrote:
> Larry Colen escribi?:
>>
>> I don't know this lens, but it's probably at least as good as the kit
>> lens, and a lot faster:
>>
>> Apr 4 - Sigma 18-50mm f/2.8 EX DC Macro Lens for Pentax - $325 - (oakland
>> rockridge / claremont) pic photo/video
>
> It is MUCH better than the kit lens. I've had one for more than two years,
> and it is one of my most used lenses. The only advantages of the kit lens
> over this Sigma EX are: QSF and (if you care about it) that the Sigma lens
> blocks the RTF under 24 mm.
What is QSF? (quality of service fund???)
What is RTF?
I think QSF is Quick Shift Focus - ??? - a way of changing from auto to
manual focus and back.
For RTF, I'm stuck with WTF?
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