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10-12-2010, 11:05 AM   #1
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Pentax-DA 50-200mm F4-5.6 ED WR and CIF

Hello everyone, can the Pentax-DA 50-200mm F4-5.6 ED WR be used with catch in focus? If it can. Where do I find the switch to turn off the auto focus?

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Jim


Last edited by jbrowning; 10-12-2010 at 03:56 PM.
10-12-2010, 11:23 AM   #2
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The switch is normally on the side of the camera with AF-S(ingle), AF-C(ontinuous), and M(anual) choices.
10-12-2010, 11:59 AM   #3
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QuoteOriginally posted by SpecialK Quote
The switch is normally on the side of the camera with AF-S(ingle), AF-C(ontinuous), and M(anual) choices.
Yes but there should be a way to turn off the autofocus on the lens also. I think. I have the DA *300 and there is a switch on the barrel of the lens that says AF and MF. But I don't see anything like this on this lens. I do know where the auto focus switch is on the camera body.

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Jim Browning
10-12-2010, 04:42 PM   #4
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The 50-200 does not have it's own motor. Since it is powered by the screw drive in the camera the on camera switch is the the only way to turn off the auto focus.

10-12-2010, 09:09 PM   #5
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QuoteOriginally posted by alwilliams Quote
The 50-200 does not have it's own motor. Since it is powered by the screw drive in the camera the on camera switch is the the only way to turn off the auto focus.
And, unfortunately, that will also turn off catch-in-focus. With my K10, even trying to trick it by turning the lens to MF while leaving the camera set to AF-S (required for CIF) turns the AF in the camera off. No CIF with my DA* 50-135, darn it all. It works just fine with the M 100/4 macro and the M 400/5.6, but not with the 50-135.
10-12-2010, 10:46 PM   #6
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Wasn't there a thread about this a while back regarding using a sticky foil strip to make the lens look like an M-mount without pins?

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10-13-2010, 12:47 AM   #7
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Doesn't K10 confirm focus with hexagon even in MF mode? I'll have a look into it.
Anyway, another trick is to depress the lens release button and the press AF. Since the screw driving the lens will be retracted it'll whirl without AFing the lens, but since the camera's AF sensor will be on it'll trip the shutter once you catch the focus...
10-13-2010, 08:14 AM   #8
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QuoteOriginally posted by axl Quote
Doesn't K10 confirm focus with hexagon even in MF mode? I'll have a look into it.
Anyway, another trick is to depress the lens release button and the press AF. Since the screw driving the lens will be retracted it'll whirl without AFing the lens, but since the camera's AF sensor will be on it'll trip the shutter once you catch the focus...
That's an interesting trick with the lens release Axl - I'll have to try it out once I figure out the way to do it without dropping my lens. The green hexagon does confirm focus even in manual mode, but when the camera is in MF, as you no doubt know, but other readers might not, Catch-in-focus is off. CIF only works when the camera mode is AF-S and the lens won't focus.

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