QSF = Quick-Shift Focus. You find that feature on the SMC Pentax-DA
16-45 f/4 ED AL, the SMC Pentax-DA 18-55, and I think on any of the
other DA and DFA lenses too.
The feature allows you to switch instantly and automatically from AF to
MF mode simply by turning the focus ring on the lens while AF is locked.
Some find it convenient. Others (myself included) don't mind flicking
the AF/MF switch. I am not comfortable holding shutter release halfway
down while also adjusting the focus. I guess I just haven't developed
the habit, so I prefer switching explicitly into MF mode.
Gautam Sarup wrote:
Hi Alex,
What are QSF lenses?
Thanks,
Gautam
On 12/31/05, Alexandru-Cristian Sarbu <[EMAIL PROTECTED]> wrote:
That's with QSF lenses. F&FAs can't (or shouldn't) be manually focused
if the camera switch is on the AF position.
And that's exactly the reason I don't have the FA 35mm f/2: I'm
waiting for the wide Limited (with QSF, of course).
