Question about Pentax *ist DL (W/18-55 LENS) Digital Camera

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Pentax Ist DL auto focus not working anymore after using Quantaray AF LD 70-300MM Lens

I borrowed a Pentax mount Quantaray AF LD 70-300mm Tele Lens from a friend of mine and it worked fine, including the autofocus, but when I removed the lens I put my original 18-55 that came with the camera the auto focus stopped working! I tried switching back to the Quantaray only to find out the auto focus no longer worked with it either. The interesting part is that my friend experienced the same problem after using the Quantaray, but thought it was just his camera. Any suggestions? I did upgrade the firmware to 1.03, but this didn't help and also reset the settings without any joy.

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Re: Pentax Ist DL auto focus not working anymore after...

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

Posted on Jul 07, 2007

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

Check your lens there is often a AF/MF auto/manual focus switch

Other than that it could be a problem with the camera take it to your dealer

Apr 08, 2011 | Pentax *ist DL (W/18-55 LENS) Digital...

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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

1 Answer

I put in new batteries in my Pentax ist-D and now the auto focus will not function. I get no beep or light to indicate when it is in focus because even when I move the button from M to Auto, the view...

Remove the lens and clean the contacts on the camera body and the lens where they meet with a cotton swab lightly dampened with rubbing alcohol. Re-attach the lens and make sure the ring (if you have one) is set to "A".

Mar 11, 2011 | Pentax *ist DL Digital Camera

1 Answer

Please help. Want to buy a Pentax K7, will these lenses work. Pentax-F Fish-eye 1:3.5-4.5 17-28 TAMRON AF 70-300 1:4-5.6 LD Tele-Macro 1:2 Sigma APO 170-500 1:5-6.3 My exist camera is a Pentax MZ-50

yes they will, I have a 70-300 myself.

As a rule, ANY k-mount lens will work on any of the new pentax cameras to some extent.

At any rate you can shoot some very nice pic with even the oldest lenses. Manually ofcourse.

With an adapter you can even use m42 screw lenses too.

Dec 11, 2010 | Pentax K7 Digital Camera

2 Answers

Been shooting with my Pentax *IST DL on “AUTO PICT” and “AF” for the last few weeks with no problem. (with and without the flash.) As of yesterday however, anything I shoot is coming out dark. Even with...

1. Clean the contacts on the camera body and lens where they meet with a cotton swab lightly dampened with rubbing alcohol. 2. Go into the menu and find "reset" to go back to the original factory default settings. 3. If you have a second lens, does the same problem occur?

Sep 13, 2010 | Pentax *ist DL Digital Camera

1 Answer

How to mount Minolta AF 28-80/3.5-5.6 on pentax

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: 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!

Apr 18, 2010 | Pentax *ist DL Digital Camera

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Does a Quantaray Tech-10 75-300 lens fit a Pentax *ist DL digital camera?

Quantaray makes lenses with a variety of mounts. If the lens has a Pentax mount then it will fit onto your camera. If it has a Canon mount, for example, then it will not.

Feb 28, 2009 | Pentax *ist DL Digital Camera

2 Answers

AV flashing in LCD of camera whn zoom attached

I found on some lenses you need to go into the menu , select settings and change av appurature setting to 2 instead of 1 .

Feb 20, 2009 | Pentax *ist DL Digital Camera

1 Answer

AV error whn pentax ist DL & Quantaray zoom lens attached

I've got the same problem. The problem is that the lense is loosely attached to the body. What you need to do is that when you see the Av flashing, press the lense of the camera to the body and twist the lense to the left a bit. This tightens the connection. You can then take the photo.

Feb 20, 2009 | Pentax *ist DL Digital Camera

2 Answers


Make sure the aperture ring is set to the "A" position. If the lens doesn't have an auto aperture setting then I don't think the lens will work. There is a setting called "Using Aperture Ring" that you can setup using the menu and configuration that can be set to "Permitted" that will allow you to take pictures even if the aperture ring is not set on "A", but not sure how well this work for you, but should allow the shutter to work.

Feb 02, 2007 | Pentax *ist DL (W/18-55 LENS) Digital...

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