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03-24-2008, 12:37 PM   #16
hll
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pop-up flash...

03-24-2008, 01:59 PM   #17
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Small user error :-(

You somehow managed to set Your cam to continuous focus (AF-C) and there You can take picture at any time, even unfocused. This explains why focus points are so weird :-) To avoid such mishaps I recommend to press INFO button before each shoot and check the most WIFE info here (WB, ISO, aperture and EV comp), also SR and drive mode. Also I strongly recommend PhotoME as superb EXIF viewer for analyzing such mishaps.

Best and do not worry, it happens, JR
03-24-2008, 02:39 PM   #18
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QuoteOriginally posted by Nesster Quote
While in most situations my 16-45 focused well enough, I've noted that on my K100d the focus point always was a bit behind what the camera indicated. Depending on how closely I looked and the aperture, I would notice the back focus with the 16-45. This was worse with manual focus lenses. Over the weekend I went into the dread menu to adjust the focus a tiny bit, which so far has improved things considerably.
How did you adjust focus on the K100D? Where is that setting in the menu?
03-24-2008, 03:20 PM   #19
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https://www.pentaxforums.com/forums/pentax-dslr-discussion/3158-k10d-service-menu-af-adjust.html

If you have consistent back focus, a + value will correct, for front focus a - value will do so. I used a +10 which seems to have done the trick (though I'll still have to validate in the medium distance, with various lenses. At least in the close up range, this smallest adjustment seems to have done the trick.)

I verified the back focus by the way in this manner: put a camera with a decent size lens mounted on a table. focus on the front of the lens, at an angle, taking lens open. Looking at the result carefully, I find the body of the camera is more in focus than the front of the lens. At least this method is more interesting than shooting at tape measures and lines on a piece of paper...

03-24-2008, 03:26 PM   #20
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Ah yes, but the question was how to do this on the K100D. I found the following, which I have simplified:

1. Power OFF
2. While holding [AE-L]+[INFO], turn the camera on. Displays Firmware.
3. Press [MENU]->[MENU]->[INFO] within 5 seconds. Displays DEBUG mode screen.
4. Press [Right key] to set [DEBUG MODE DIS] to [DEBUG MODE EN].
5. Press [OK]. (Omit on some models?)
6. Press [MENU]. Displays setup menu.
7. Press [Up key] to select AF TEST.
8. Press [Right key] to go into AF TEST menu.
9. Press [Down key] to select FOCUS CORR.
10. Adjust shift amount using [right key] or [left key]. (To correct back focus use "plus" side of scale; to correct front focus use "minus".)
11. Press [OK] to save.
12. Test your camera and repeat from 6 until satisfied.
13. Repeat steps 1 to 3.
14. Press [Right key] to set [DEBUG MODE EN] to [DEBUG MODE DIS].
15. Press [OK].

Last edited by rparmar; 03-24-2008 at 03:51 PM. Reason: extra info added
03-24-2008, 04:00 PM   #21
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Thanks Nesster, but I was interested in the K100D.

@rparmar - Thanks a lot! Great info! Greatly appreciated!

Sorry about the hijack hll ...
03-24-2008, 04:04 PM   #22
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Oh, and this does not work on the K100D Super, so I cannot validate anything. Just reporting what others have written.
04-11-2008, 01:36 PM   #23
hll
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ok my last decision;
pentax sucks under low light conditions.
it is better to use manual focus... when f is 4 or more...

04-11-2008, 02:28 PM   #24
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16-45

My 100D has trouble with pictures under tungsten lighting. I think you might find it best to shoot in the "raw" mode. Then adjust white balance and process PP before converting to jpc pictures. Works best for me when I am not in sunlight.

Ray
04-11-2008, 02:34 PM   #25
hll
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which wb mode should i choose?? awb or???
but make sense what you are talking about
thanks a lot
04-11-2008, 02:39 PM   #26
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I`m using my 16-45 in about 90% of my photographing, and in my opinion it`s sharp as a knife. Ive never had any focusing problems. I have used it on both a K10 and a K20.
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