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06-16-2014, 01:20 PM   #1
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K5ii underxposing - metering issues

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Last edited by Apost.; 10-13-2014 at 06:05 AM.
06-16-2014, 01:32 PM   #2
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Hi,

I am a K-5 II owner.

1. Please update the firmware on the camera.

2. Reset the camera to factory defaults.

Please let us know the results.

Cheers!
06-16-2014, 01:35 PM   #3
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That's a bit excessive. Certain manual lenses (M, K, an A) can fool the light meter and thus require you to dial in a manual compensation for consistent exposure, but normally I wouldn't expect more than a 1/3, 1/2, or 2/3 stop adjustment to be necessary.

Is the exposure correct with the 18-55mm? Are you following the correct procedure to stop-down meter?

Adam
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06-16-2014, 01:37 PM   #4
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QuoteOriginally posted by Deedee Quote
Hi,

I am a K-5 II owner.

1. Please update the firmware on the camera.

2. Reset the camera to factory defaults.

Please let us know the results.

Cheers!
Thanks for the reply.
Before posting i did update the firmware (although it was 1.07 i did it again) and afterwards reset the camera to defaults as well as the custom functions.

---------- Post added 06-16-14 at 01:39 PM ----------

QuoteOriginally posted by Adam Quote
That's a bit excessive. Certain manual lenses (M, K, an A) can fool the light meter and thus require you to dial in a manual compensation for consistent exposure, but normally I wouldn't expect more than a 1/3, 1/2, or 2/3 stop adjustment to be necessary.

Is the exposure correct with the 18-55mm? Are you following the correct procedure to stop-down meter?
The above photos were taken with the 18-55, the problems i am describing manifest with the 18-55 as well as two other A lenses (A 35mm f/2 , 50mm f/1.7 )

06-16-2014, 01:57 PM   #5
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Long shot but has the focusing screen been replaced by a non-Pentax screen by the previous owner by any chance?

Another long shot: A strong light source entering through the viewfinder?

And no, my K5IIs exposes correctly also in dim light and I get the blinking numerals when the light level becomes too dim.
06-16-2014, 02:10 PM   #6
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QuoteOriginally posted by Ole Quote
Long shot but has the focusing screen been replaced by a non-Pentax screen by the previous owner by any chance?

Another long shot: A strong light source entering through the viewfinder?

And no, my K5IIs exposes correctly also in dim light and I get the blinking numerals when the light level becomes too dim.
This is the screen(i guess it's the stock one):
http://img.photobucket.com/albums/v313/RiceHigh/K-5/Focusing_Screen/DSC07381S.jpg

No light sources, i also covered the viewfinder before taking the picture just to make sure no light was entering the viewfinder.

I can't get the numerals to blink even in complete darkness (except when in live view)
06-16-2014, 02:45 PM   #7
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what's "exposure priority"?

Does this happen on av/tv/tav w/ iso on auto?

also, have you tried this with center weighted or spot metering? That scene, except for the camera is pretty light so maybe the cam is trying to turn all the light walls into grey (but still it's underexposed, I know).
06-16-2014, 02:50 PM   #8
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I'm out of ideas. It looks as if your camera needs a trip to the service cernter to get the meter calibrated.

06-16-2014, 03:32 PM   #9
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QuoteOriginally posted by vagrant10 Quote
what's "exposure priority"?

Does this happen on av/tv/tav w/ iso on auto?

also, have you tried this with center weighted or spot metering? That scene, except for the camera is pretty light so maybe the cam is trying to turn all the light walls into grey (but still it's underexposed, I know).
Ops i meant Aperture priority, my bad.
Doesn't matter if its auto iso, av/tv/sv/p whatever it still chooses a combination that underexposes.
I've tried all the metering modes , even in spot metering still the same.
I've taken hundrends of shots all the same.

I will upload two more photos tomorrow in better lighting conditions, indoors always, outdoors the difference is there but it is negligible.

QuoteQuote:
I'm out of ideas. It looks as if your camera needs a trip to the service cernter to get the meter calibrated.
That is my feeling too, at least it is still under warranty.

Many thanks for all the replies

---------- Post added 06-16-14 at 04:23 PM ----------

Long shot but..
is downgrading firmware possible?
The first thing i did when i got the camera was to update from 1/06 to 1.07, so i do not know how things were with 1.06.
06-16-2014, 06:49 PM   #10
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What is in the D-range setting? Do you have highlight correction on? If that is ON then I think the camera will have a tendency to meter toward the underexpose side (ETTL).
06-17-2014, 02:52 AM   #11
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Highlight and shadow protection off.
I did downgrade, no luck.

---------- Post added 06-17-14 at 03:29 AM ----------

Ok on more example in better light (EV7)






The difference here is 2/3 of a stop.
06-17-2014, 04:16 AM   #12
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Hi,

Which lens are you using? What is the Exif information on the picture taken?

Cheers!
06-17-2014, 05:30 AM   #13
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Both pictures with the 18-55.

First picture : 35mm 1/15sec f/5.6 iso400 matrix metering (through live view)
Second picture : 35mm 1/25sec f/5.6 iso400 matrix metering (through ovf)
06-17-2014, 05:44 AM   #14
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Hi

These are absolutely normal pictures. There is nothing to worry about.

The first picture is better exposed as it is 1/15th of a second.

Second picture is under exposed as it is 1/25th of a second.

Please use spot metering when you want the subject like the camera in your very first photo to be better exposed and in Av (Aperture priority mode). I would choose widest like 3.5 so that exposure time is lesser and the chances of shake are lesser.

However if you do think that it is under-exposing well you send it for repair.

If you are searching for problems you will find one. You see people who get blood test done more frequently, chances are they will find something wrong.

Cheers!
06-17-2014, 06:00 AM   #15
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QuoteOriginally posted by Deedee Quote
Hi

These are absolutely normal pictures. There is nothing to worry about.

The first picture is better exposed as it is 1/15th of a second.

Second picture is under exposed as it is 1/25th of a second.


Cheers!
i agree these pictures are perfectly usable, i uploaded them in order to show the difference in metering between the ovf and live view.
I just switched to live view and took the picture again, there should not be any difference in metering, yet the camera underexposed a bit the second shot which is with the ovf.

Last edited by Apost.; 10-13-2014 at 06:16 AM.
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