Several problems with K10D

[WildSammy]

Hello.

I'm owner of K10D somewhile and after several months of use I'm registering some problems in comparsion with my previous K100D.

First problem is underexposure with flash, but for example 1st photo have very good exposure and second photo of same subject and composition is underexposed.

Second problem is color.. photos are going to green and have slight green coloring on every photo. I can register it on faces. There's not that warm face as I had on K100D.

Third problem is focusing and sometimes focusing freezes during action.

Have someone else registered similar problems?

Thanks.

--
S.

 

[K10DPortugal]

White Balance have right settings according the situation??

 

[WildSammy]

I'm using most of time AWB and in custom functions WB with flash is set to ON.

Flash is AF360FGZ and color space AdobeRGB.

Auto zoom on flash do not set on 70mm with my Tamron 28-75 on long end, but hangs on 58mm. With manual I can set 70mm without problems.

With 18-55 objective is autozoom OK.. may be it's the flash fault and not K10D.

--
S.

 

[RebleXT]

I'm using most of time AWB and in custom functions WB with flash is
set to ON.

Flash is AF360FGZ and color space AdobeRGB.

Auto zoom on flash do not set on 70mm with my Tamron 28-75 on long
end, but hangs on 58mm. With manual I can set 70mm without problems.

With 18-55 objective is autozoom OK.. may be it's the flash fault and
not K10D.

--
S.

With manual I can set 70mm without problems?? Are you sure. I have the AF540FGZ and the longest setting is 58mm (when Flash is set to Format:digital)
70mm is the maximum for Format:35mm

I think you are using the wrong format (yellow writing on the 540, 360 I don't know. Have a lock at the manual.

AdobeRGB is probably wrong. Unless you are using calibrated pro equipment and unless you are producing pictures for prints use sRGB.

 

[Negative287]

Hello.

I'm owner of K10D somewhile and after several months of use I'm
registering some problems in comparsion with my previous K100D.

First problem is underexposure with flash, but for example 1st photo
have very good exposure and second photo of same subject and
composition is underexposed.

Are you making sure the exposure is correct and eliminating any light coming from behind the camera? This body (like many others) tends to allow some light bleeding through the viewfinder and it can mess up your exposure. Try a gray card test for exposure.

Oh and make sure that you custom setting doesn't allow the shutter to be tripped until the flash is fully recharged as this will cause the second shot underexposure.

Second problem is color.. photos are going to green and have slight
green coloring on every photo. I can register it on faces. There's
not that warm face as I had on K100D.

It's all about white balance and calibration. If you haven't set the White Balance Correctly or at least corrected it on a calibrate monitor then you're going to have to figure out correct this issue.

Third problem is focusing and sometimes focusing freezes during action.

Define Freezes? Is it a 3rd party lens? 3rd party lenses (Sigma and Tamron) have been known to cause this issue in many different DSLRs (not just Pentax) over the years and they may need to be updated (usually the 3rd party will do this for free if you ship them the lens).

Have someone else registered similar problems?

Thanks.

--
S.

--



'The probability that we may fall in the struggle ought not to deter us from the support of a cause we believe to be just; it shall not deter me.' -- Abraham Lincoln

 

[chmerr]

I have noticed some of the green you experienced....definately the AWB. If you adjust for the room it will be dead on. I have seen the photos have big differences just by changing my position in the room.

 

[WildSammy]

Thanks for answer I'm converting AdobeRGB to sRGB in photoshop I have feeling that more color information is preserved when I shoot to AdobeRGB and then convert to sRGB.

mmm.. on my flash I can select only between 35mm, 645 and 67.. i have set it to 35mm..

--
S.

 

[Negative287]

AdobeRGB is probably wrong. Unless you are using calibrated pro
equipment and unless you are producing pictures for prints use sRGB.

Adobe RGB is just a gamut but shoot that's the green problem! You can shoot Adobe RGB all you want but if you view it in a program not aware of the color space your images will have a green cast. Make sure you convert to sRGB for web related images (oh and note that most monitors really aren't built to display this color space correctly).

As for Printing, CMYK is more for professional prints than aRGB is.

Here's an example, the aRGB could look really washed out or it could look very green.

sRGB



aRGB



--



'The probability that we may fall in the struggle ought not to deter us from the support of a cause we believe to be just; it shall not deter me.' -- Abraham Lincoln

 

[Roland Mabo]

I'm owner of K10D somewhile and after several months of use I'm
First problem is underexposure with flash, but for example 1st photo
have very good exposure and second photo of same subject and
composition is underexposed.

Sounds like the flash isn't charged enough for the 2nd photo. With the K10D, it is possible to fire the external flash even when it's not charged enough, and this leads to underexposure. This is not possible with the built-in flash because the camera can be set to not fire the flash unless it is fully charged, but do note that this setting only works for the built-in flash - with external flashes you can always fire them, even when they are not fully charged.

Second problem is color.. photos are going to green and have slight
green coloring on every photo. I can register it on faces. There's
not that warm face as I had on K100D.

Outdoors or indoors?

I have not experienced such problems with my K10D, but do use the presets indoors.

Third problem is focusing and sometimes focusing freezes during action.

Are you using AF-S or AF-C?
AF-C is continous focusing for moving subjects, use AF-C for action shiots.
--
Take care
R
http://www.flickr.com/photos/raphaelmabo

 

[Roland Mabo]

Nono, Adobe RGB has different colours than sRGB, it doesn't have more colours. (it has the same amount of colours). Don't convert between sRGB and Adobe RGB if you are not shooting RAW, I have not got good results with converting with JPEG - the converter must really re-map the colours and this is obviously a tricky cast.

Use sRGB for webimages and personal prints through personal printer.
Adobe RGB is for professional printers, magazines and that stuff.
--
Take care
R
http://www.flickr.com/photos/raphaelmabo

 

[Roland Mabo]

Very correct!

If you are not using software which uses colour profiles, Adobe RGB and sRGB will look different on the screen.
--
Take care
R
http://www.flickr.com/photos/raphaelmabo

 

[WildSammy]

Thanks! I have set it back to sRGB )

--
S.

 

[Negative287]

Adobe RGB has more tonal range as the Gamut is wider and colors aren't mapped exactly the same as they are in sRGB which is why the colors shift.

Nono, Adobe RGB has different colours than sRGB, it doesn't have more
colours. (it has the same amount of colours). Don't convert between
sRGB and Adobe RGB if you are not shooting RAW, I have not got good
results with converting with JPEG - the converter must really re-map
the colours and this is obviously a tricky cast.

Use sRGB for webimages and personal prints through personal printer.
Adobe RGB is for professional printers, magazines and that stuff.
--
Take care
R
http://www.flickr.com/photos/raphaelmabo

--



'The probability that we may fall in the struggle ought not to deter us from the support of a cause we believe to be just; it shall not deter me.' -- Abraham Lincoln

 

[WildSammy]

Freezes 3rd party lens.. it's Tamron 28-75 f/2.8 and during focucsing on AF-C or sometimes AF-S it freezes non-focused and I have to halfpress shutter button again and again. With 18-55 I don't have this problem.. so it's the lens?

S.

 

[wonderkid]

Have someone else registered similar problems?

No.

 

[Col K10d]

Actually my Tammy70-300 had just started to do that, only lens I have a problem with (well it was the cheapest). Have to press the lens release and twist it in the mount and re lock it on and its fine for the next 50 shots. Contacts look clean...weak spring on one of them i wonder?

Freezes 3rd party lens.. it's Tamron 28-75 f/2.8 and during focucsing
on AF-C or sometimes AF-S it freezes non-focused and I have to
halfpress shutter button again and again. With 18-55 I don't have
this problem.. so it's the lens?

S.

--



Col

 

[WildSammy]

Thanks for sharing info.. i will try to remount my Tamron and may be it helps for a while

--
S.

 

[Robert Chow]

Make sure the contacts are clean too. It could just be the manufacturing tolerances of the Tamron aren't quite right for Pentax since you don't have this problem with the DA18-55mm.

--
rc

 

[WildSammy]

I have done some tests with new settings and sRGB solved the green cast problem. Remount of Tamron 28-75 f/2.8 and cleaning of contacts with special spray solved focus freezing.

Now I have only to do some tests with flash to reveal the underexposure problems

Thanks all for your answers they was realy helpful

--
S.

 

[WildSammy]

I wrote e-mail to local service partner and he told me I cloud have shifted AE sensors and therefore I can have problems with underexposure.

Where are the AE sensors situated? Have anybody some diagram? Can AE sensor shift during small fall or some vibrations?

--
S.