Hi, i have a pentax ISTDL and when i try 2 use it in manual focus the AF still works on its own

I experience same thing on my K5 recently. The reason is the shutter and needs to replacement.
You can try to set the camera on "continuous shooting mode", and shot three or more frame consequently. By this way you could miss one or two frames but you may have one or more frames ok.

Thanks for contacting us regarding the issues you are having with our product. I have an intial question for you that will help me out tons, what is the actual full model number of your camera?

Thanks,
Cammykins

Putting the camera in manual mode still doesn't change the focus routine. If you want manual focus, there is a switch near the lens on the left allowing AF (auto focus) and MF(manual focus).

Unfortunately, it is not possible to mount Minolta lenses on a Pentax K mount camera and retain either auto-focus, metering, or the ability to focus at infinity.
The reason for the loss of the ability to focus at infinity is because the distance from the mount to where the image forms on a Minolat lens is 43mm, whereas on a Pentax it is 46mm, so the Minolta lens glass would need to be 2mm into the body of the Pentax camera in order for the image to form on the sensor (i.e. have a clear image that is in focus).
The only solution to this is to purchase an adapter with an optical element such as this: http://photo-adapter-llc.amazonwebstore.com/Zykkor-Minolta-MD-Lens-to-Pentax/M/B004PB8142.htm?traffic_src=froogle&utm_medium=CSE&utm_source=froogle This will allow you to focus at infinity, however you will have to use stop down metering and manual focus, as the electrical contacts will not connect. Also, you can expect a slight loss of image quality when using an adapter.
I personally have a few Minolta lenses that I have wanted to use on my Pentax, so I understand your pain. It is a shame they don't work better.
Thank you for using FixYa!

Is your "exposure compensation" (the button with the +/-) set to "0" or some other setting?

It will default to manual through the viewing screen. It will only work on automatic, using the viewfinder. Make sure you also set the focal length (lens to shutter distance). You might also have a mf / af switch on the lens. This also only works through the viewfinder.

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
:)

If this is a manual focus lens, you will need to do two things (and an optional third thing.)

1) On the side of the camera, you have to switch the focus mode switch from "AF" (Autofocus) to "MF" (Manual focus) . . . Yeah. I know, you probably already did that. <grin>

2) When you press Menu, go to the Custom Setting and change the Allow aperture setting to on, so that the Pentax K100D will then work with manual control of the aperture ring. You need to do this or the K100D will not work with manual exposure lenses (M lenses) or even autoexposure lenses (KA, KA2, FA, etc.) when you move the aperture ring from the "A" position to one of the manual aperture settings!

3) This is optional, but in the Custom Setting you can also turn on the Fl in manual focus mode, so that even though you don't have autofocus capability, you will get a beep indicator when you have successfully managed to manually focus your lens.

I have a few nice manual focus lenses that I have a lot of fun playing with on my K100D.

Take care & Happing Imaging!
Glen
:)

It seems to be a connection issue between the Lens and the Camera body. Perhaps the mount is not true to the body Ask Pentax about this their Technical Support Team

Pentax make three different screens for the D and DS. Go check their homesite, or do a search here. None of the Pentax oriinal screens has microprismes or split image. They are engraved in different ways.