Question about Pentax *ist DS Digital Camera

3 Answers

DS Front Focus Problem

I was wondering if any one else was having front focusing issues with the DS. I noticed some of my pics did not autofocus where I intended and found that my DS front focuses about 8mm with my FA 50mm 1.7 at close focus (see test sheet). It also does this with the kit lens but is less noticable due the deeper dof. I repeated this test many times and found that the focus line is somewhat out of focus. Can this be adjusted in camera and do you think this is a problem I should try to have rectified?

Posted by Anonymous on

Ad

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 542 Answers

Try focusing on somebody's eyes at a wide open aperture and see where the focus is once you down load it to your computer. Also manual focus the same subject by using the focus screen and not the focus indicator and see if your MF attempts are correctly focused. If you do the focus on somebody's eyes do it at an angle to the face so you have the nose, eyes and ears in the pic, but at an anlge of say 45 degrees so the nose is foremost and the ears rear most, and you will then see where the focus actually is when you down load the pic. When doing the AF, just make sure that you focus on the eyes via the AF indicator and when focuing via MF use the focus screen to get clear focus. Then compare the two. Obviously your subject will need to keep still. This is more of a real world scenario so as you can see how it works with real objects.

Posted on Sep 08, 2005

Ad

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 542 Answers

Just be careful about how you do the test as it is very easy to get the incorrect result. The edge of the focus indicator for AF has to be in exactly the correct position or you will get incorrect focus. I would be very cautious about this test as you can very easily get the wrong result. Please try the test again and make absolute sure that everything is set correctly and the focus indication is in the correct spot. It only takes it to be a fraction out to give wildly inaccurate results. Is the camera set exactly to the required 45 degree angle? When I tested my lenses, I folded a piece of A4 paper from one corner over to get a 45 degree angle and used that as a guide for setting the lens angle. It is also an idea to make sure you have the camera close enough to the test paper. Also try setting the camera to MF and then focus the lens to infinity and then switch back to AF and let the camera focus on the test and see how it focuses. Then try the same thing but focus manually to minimum focus and then switch to AF and let the camera AF again and see whether the result is different. If there is a difference then you may have the AF indicator in the incorrect spot. There are so many variables in this test that it is of utmost importance to get the test right. Are you getting OOF shots in your general photography? If not then the test maybe irrelevent and you are possibly chasing demons that aren't there. Only if you are 100% sure you are doing the test correctly and you are positive that it is indeed front focusing that I would then send the camera for repair.

Posted on Sep 08, 2005

Ad

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 542 Answers

I had a similar challenge with my D, the difference being it back focussed, it only happened with one lens, my FA* 24/2.0. Strangely, after returning them both to Pentax, it turned out to be the body, not the lens, which was kind of bizarre! Eventually after 3 months of backwards and forwards with the body, Pentax replaced it with a new one. Everything is now fine (apart from 1 hot pixel, which I can cope with). I pursued the matter with politeness and accepted the delays, the staff at Pentax UK were MOST helpful, but tied by company rules that the repairs had to go back to Germany each time, which added probably 80% to the delays. I ran with film in my MZ-S and digital on my Fuji 602 (backup digicam) while it was being sorted. I must admit I'm considering adding another body, but will probably wait until the year Pentax decide to bring the out D replacement.

Posted on Sep 08, 2005

1 Suggested Answer

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why wont my Nikon af nikkor 70-300mm G lens autofocus its self with my D5000 camera


The D5000 does not have a focus motor in the body, relying on the lens to have one. The old 70-300mm G lens does not have a focus motor, relying on the camera to have one. Thus, this combination will not autofocus.
The newer 70-300mm AF-S G lens, as well as the even newer 70-300mm VR AF-S lens, do have the autofocus motor and thus will autofocus on the D5000.

Dec 26, 2011 | Nikon AF 70-300mm f/4-5.6 G Nikkor Lens

1 Answer

My a720 is on auto but won't take a pic everytime just the bright orange light on the front and nothing happens


Soundsl ike you got a autofocus issue and this needs to be taken care of by a camera shop. The issue here is the auto focus sensor the normally causes the camera to not turn on or to turn on and the breif off again. I would have it looked at by a camera shop,

thanks and please do leave positive ratings and feedback for your free answer today.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

May 04, 2010 | Canon PowerShot A720 IS Digital Camera

1 Answer

S5 pro autofocus will not work consistently.


Hi - just wondering if you found a solution to your problem - as my S5 pro has the same issue.
thanks

Apr 15, 2010 | Fuji FinePix S5 Pro Digital Camera

1 Answer

I have an Olumpus d-535 camera that does not Autofocus well.


Try pushing the Shutter halfway down until you get a green "go" indication, and take the pic. This forces the camera to focus, and is something you often have to do with these point and shoot automatic focusing cameras.

Mar 13, 2010 | Cameras

5 Answers

Auto Focus not working for Canon EFS 18-55mm lens


I see this same problem occuring all over the internet on Canon lenses. Autofocus not working any longer. For some stupid reason the lense will lock up and quit autofocus while other lenses will work fine. A light pull on the lense focus ring away from the camera body will give a noticable pop or click which unlocks the jammed lense. Try it if you are having troubles with your autofocus. This is a very common problem and worth giving it a try.

May 30, 2009 | Canon EF-S 18-55mm f/3.5-5.6 USN Lens

2 Answers

Autofocus motor run but no focus


Found this myself check manual focus ring (closest to camera) maybe ring has moved to "manual"position. This ring moves backwards and forwards between "manual" and "auto" and may need pushing home completely

Dec 25, 2008 | Sigma APO 50-500mm F4-6.3 EX DG/HSM Lens

1 Answer

EOS 1n will not Autofocus


is the autofocus button on the lens set on AF position.
If it is then remove the lens once and reinstall and then try.

Dec 28, 2017 | Canon EOS-1N RS 35mm SLR Camera

2 Answers

Pentax *ist DS digital SLR Autofocus problem


Being an SLR camera, you should try another lens. It may be a servo fault in the lens. If the lens is okay, then it can be anything in the lens sensing, lens control drive circuits, and or lens to camera interface area. This would have to be properly diagnosed and serviced.

Jerry G.

Oct 11, 2008 | Pentax *ist DS Digital Camera

1 Answer

Buying a camera lens


Presumably you intend to use a DSLR. The automatic nature of modes relates to exposure. Lenses autofocus assuming you have turned the autofocus switch on. Switch the autofocus off if you want to manually focus. Whichever you use will not affect the modes

May 11, 2008 | Cameras

2 Answers

Beginners question : Autofocus


In the custom settings, you can program the "ok" button of the 4-way controller to disable AF. It's kind of a handy little trick. It's called "Ok button when shooting" or something.

Sep 08, 2005 | Pentax *ist DS Digital Camera

Not finding what you are looking for?
Pentax *ist DS Digital Camera Logo

88 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pentax Cameras Experts

Ekse

Level 3 Expert

13434 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1691 Answers

FIKRET UNALIR
FIKRET UNALIR

Level 1 Expert

239 Answers

Are you a Pentax Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...