Question about Pentax *ist DS Digital Camera

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The auto focus does not work

I have tried other lens and new batteries - no luck.If I go to manual focus the appropriate symbol appears. When I change the button to AF, no symbols light and there is no indication of even trying to focus. The shutter can be released. I have checked the lens I most use and by turning the focus ring the drive scew at the lens base turns. I saw a suggested fix for a similar problem that involved reflashing the firmware, but there was no expanation of how to do this.

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Try the Pentax tech support they may have an idea But if it is a board fault- will it be an economical repair proposition? They may also offer a 'swap out' option if it is an on going issue.

Posted on May 16, 2007

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Posted on Jan 02, 2017

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Remove and re-seat the lens.

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Try taking a picture in broad daylight - or other well lit area - if the subject is very dark, the auto focus will struggle or "hunt".

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Camera appears to have a poor autofocus, images are consistently blurred and out of focus, worse in artificial light but similar problem in all conditions.
If the camera works well with the manual mode then the possibility of the auto- focus section being faulty needs to be checked. it can be an issue with the drive within the lens unit that is not correcting the lens to focus.
remove battery and tap on the lens hood on your palms, replace battery and switch on to see if there was any change. repeat to see if the drive gets corrected, if not the camera must be opened up to confirm if the sensor or the lens mechanism is faulty.

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Auto focus does not appear to be working
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Usually this is a lens fault as the focusing gear is all in the lens. Clicking sounds as if a rear pinion has cracked. It's not uncomon in the 'prosumer' level lenses where plastic gears are used a lot.

It's just possible the fault is which the auto-manual switch. This usually has a mechanical clutch coupled to it which physically disconnects the gearbox from the focusing ring, as well as operating a switch to tell the camera to turn off the AF system.

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I BOUGHT A PENTAX K10D THAT CAME WITH A VERY NICE AUTO ZOOM LENS. I OWN SEVERAL OLDER PENTAX LENSES THAT I USED ON MY K1000 CAMERA AND I WANT TO USE THEM ON THE K10D. I CANNOT FIGURE OUT THE SETTINGS THAT...
Hello,

I don't own a K10D, but I do own a K100D which I have successfully used both manual focus & auto-focus lenses from my old Pentax stash!

1) If it is a manual focus lens, you need to turn off Autofocus on the body of your K10D. On my K100D, there is a switch on the side of the lens mount that says [-MF or -AF]. "-MF" is manual focus mode & "-AF" is autofocus mode. Since your lens doesn't have autofocus capability, turn it to the "-MF" mode.

Also . . . When I press "Menu" and go to "Custom Setting", I change two settings . . .

1) I change "Using aperture ring" to "Permitted". This allows you to use manual lenses (M lenses) that do not have an auto(exposure) setting, and also lets you use Auto lenses (A, KA, KA2, FA, etc.) in either the Auto or manual aperture setting modes.

2) I change "Fl with S lens used" so that even with a manual focus lens, although I don't have autofocus capability, my K100D beeps and shows a little red square in the viewfinder when I have successfully focused manually!

The K10D should have the same options.

This should get you up and running!

I have had a load of fun with my old lens on my new digital Pentax!

Take care & Happy Imaging!
Glen
:)

Jul 14, 2008 | Pentax K100D Super Digital SLR Camera

1 Answer

Trouble auto focusing
If it's any consolation, I have the same setup and the same problem. I'm now at the point where I'm probably going to have to return the lens as faulty, but there are a few things it could be on yours which you might want to check.

Have you got the D200 set to auto-focus? The selector (on the front of the camera, on the lower left) should be in the S position (as opposed to C or M).

Have you got the lens set to auto-focus? It should be in the M/A position, rather than M.

Have you tried cleaning the contacts? Pop the lens off and give the contacts a clean with the appropriate equipment. Dust on the contacts could be causing a problem.

Failing that, have you tried turning the camera on and off a few times?

I've obviously tried all the above on mine, and now suspect I've got a faulty lens that needs fixing ... which really sucks! Good luck with it, let me know if you get it working.

Dan

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Minolta Maxxum 7000i
Is there a micro focus switch on the lens
On my lens if switch to Micro Mode the Auto focus is disabled, Also it is a stupid question but you are using a AF lens and not a xi series or manual focus lens.

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