Question about Pentax K100D Super Digital SLR Camera

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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 NEED TO BE CHANGED ON THE CAMERA TO MAKE THEM WORK. I SPENT SEVERAL HOURS IN THE BOOK TRYING TO FIGURE IT OUT AND AM MORE CONFUSED NOW THAN WHEN I STARTED. THANKS ROY

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  • Just Gort
    Just Gort May 11, 2010

    Pentax rules!!

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1. Set manual focus
2. In Menu -> custom settings ->Using aperture ring = 2
3. When taking photo, focus, set aperture and press green button to set exposure time. Then press shutter.
works fine with my antique SMC Pentax lenses.

Posted on Jun 30, 2009

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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
:)

Posted on Jul 26, 2008

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1 Answer

Can you usePentax k1000 or me super film caamera lens on a Pentax ditigal camera?


Yes, with limitations. The lenses will fit on any Pentax (now Ricoh) digital SLR. You may lose autofocus and/or auto exposure metering.

Oct 19, 2014 | Pentax Digital Cameras

3 Answers

K100D AF/MF SWITCH STUCK IN AF


Can you be more clear with your problem . When you are facing this problem ?

Have you done basic troubleshooting techniques like replacing new batteries, gentle tapping on camera

Oct 04, 2008 | Digital Cameras

Tip

Digital Cameras


Since I have been a expert on Fix ya, I have seen many people write about the auto-focus of the digital zoom lens. Here are a few tips and tricks that will help you in the future.

The Right Lens for the Job
There is another reason for using zoom lenses, especially when you are taking pictures of people. Lenses can alter the appearance of your subject, and wide angle lenses can distort people’s faces – especially if you are taking our advice and getting in close. So, by all means, get close, but if you are doing a portrait, use your zoom as well. Longer lenses are more complimentary and should be used even if you are actually physically close to your subject

What Brand is your SLR?
This is important because every mounting brace for all the camera's are different for example, and Nikon will not fight on a Canon, Canon will not fit on a Pentax and so forth. Some may fit, but the auto focus will not work. So make sure you know your brand and model number before just going out and buying a lens for your camera.

Here are six steps to help you buy the best lens for your money and the camera.
  1. Determine the focal length you'll need
  2. Decide if you want a prime or zoom lens
  3. Select a maximum aperture
  4. Choose between first or third party lenses
  5. Evaluate any extra features
  6. Read reviews and narrow your options

on May 05, 2010 | Digital Cameras

1 Answer

Lenses on K10D do not focus correctly on low f stops eg; f1.4/2.0 but focus well on higher f stops eg f11. On the lower f stops the lenses are back focusing by around 4 to 5 cm. Any help Thanks


Although you think the lens is in focus, when stopped down, I know it is not.
There are enough articles that tell about Depth Of Field, but I give a short explanation.
The DOF from a 50 mm lens on a APS-C camera, when set to f /1,4. when you focus on 1 meter, is just 2 cm when on f /4 you have a totoal of 6 cm and on f /11 it is 11cm. So wen your camera / lens combination has a back focus of about 5 cm, it will come within the 11 cm you get in f /11. Still the picture is not in focus, but you see what you want to see sharp.
I searched through the complete manual, scanned the review on Dpreview and searched the site from Richo, but noting to find about correcting back or front focus. on the K10D. Perhaps, because in the days this camera came on the market, they thought the photographer who uses f /1.4 lenses is used with manual focus.
I'm, not sure, but perhaps someone on the Richo / Pentax service centre can tell you, if they can correct the setting for your lens.

To my experience, the front or back focus is in the camera. (the six or 7 lenses I use on my camera, all have the same back focus, but my Nikon has a setting to correct that.

So if you want to use your lens without any change made to your camera, there is only one option, focus manually.

Sorry I could not find more.
Success

Mar 08, 2014 | Pentax Digital Cameras

2 Answers

Doesnt seem to work with the lens which was on my old K1000 which is a SMC Pentax-M1:2 50mm, serial number 5918334 any ideas?


Although your lens is an older manually operated K mount and will physically fit onto your camera, there are incompatibilities which limit the level to which it is compatible with your *ist DS.

Ignoring the really obvious difference that your lens is totally incapable of autofocus, the first real incompatibility is that your camera body has one of the "crippled" versions of the KAF (autofocus) mount. This means that it lacks the mechanical stop-down coupler/indicator used on the original K mount. The result is that your camera body does not sense which aperture the lens is set to and will not stop the lens down to the selected aperture when you press the shutter release. The full specification KAF mount maintains these old mechanical legacy couplings, but as most owners don't use older lenses any more the crippled KAF isn't an issue to most users and significantly reduces manufacturing costs. Crippled KAF lenses can still use some manual K lenses, but only the ones which have the A setting on the aperture ring and your lens pre-dates this development.

Your only realistic fixes for this are to either replace the camera body with a model supporting the full KAF mount (expensive) or to use later K lenses with the description SMC Pentax A instead of earlier SMC Pentax M. You'll still lack autofocus but as long as the lens aperture ring is set to the A position then it will work when the body is set to shutter priority and Automatic modes. There are far more Pentax A lenses remaining in good condition than Pentax M so you should have no trouble finding them, but because of their compatibility with later mounts you'll find that prices are somewhat higher.

Note that there is no adaptor which will allow you to improve compatibility between your present camera and the lens you have asked about.

I hope that I've answered your question, if so please take a moment to rate my reply. If not, perhaps you should add a comment to further explain in which way your camera doesn't work with your lens and I'll then try to assist you further.

Sep 13, 2010 | Pentax *ist DS Digital Camera

1 Answer

Slow to autofocus and sometimes will not focus at all with my pentax k10d slr digital camera with a pentax 16-50 da lens. when I switch to manual focus the camera works fine.


Clean the contacts on the camera body and the lens where they connect with a cotton swab lightly dampened with rubbing alcohol.

Sep 27, 2009 | Pentax K10D Digital Camera

1 Answer

Pentax K10D won't work with lens from Pentax K100 (film0


The lenses are probably manual focus lenses,  
  1. Make sure that the apature ring is set to 'A' or automatic, 
  2. if these are manual focus lenses then switch the focus switch on the left side of the camera body to MF 
  3. If this still doesn't work, or you are having trouble with the apature ring then press the menu button to go to the  menu then press the right arrow key untill you are in the  Custom Settings, scroll through the custom settings with the up and down arrow keys until about the 2nd from bottom there is an option called "using aperture ring" set this to 2 (Permitted) This will make the camera take a image when lens is on any f-stop manually. 
Try this and everything should work fine. If all this hasn't worked then try seting the mode dial on the camera to M manual mode. Cheers

Feb 12, 2008 | Pentax K10D Body Only Digital Camera

2 Answers

SLR not working


The lens you are talking about has either:
1)a faulty diaphragm mechanism ( lens stays closed at f 22 or f 16 when you attach it to the camera instead of opening fully as it should ) . or
2) the lens is fine but the diaphragm coupling mechanism inside mirror box ( on the left hand side if viewed from the front ) is not engaging the lens properly so that your lens stays fully closed ( F 22 /16 ) : because diaphragm stays fully closed image in viewfinder appears v. dark.
Solution ? have a camera technician take a look but my guess is that the diaphragm needs cleaning and it should not cost you more than $ 80 bucks.

Nov 26, 2007 | Pentax *ist D Digital Camera

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