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sjt_1971 · 11-14-2010, 05:31 PM

Hi,

Just got my K5 (kept my k20d and traded in a k10d).

The images at higher iso's are 50% bands such as these cat pictures and some massive blue fringing on any thing thats remotely bright with a tube in it( I get blue high lites on most things and have to stop down 3-5 evs to get rid of them (mostly) ).

Happens with all my lenses - same images with k20d fine.

I guess a trip back to bristol cameras for a replacement is in order

(60 mile round trip

)

Anyway Hi everyone

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JeffJS · 11-14-2010, 05:36 PM

Return it for replacement. 60 miles is nothing compared to eating a defective camera.

sjt_1971 · 11-14-2010, 05:43 PM

yeah i know, not going to be able to do it for at least a week - never mind first iffy pentax item in 3 years so I guess it was due lol

JeffJS · 11-14-2010, 07:00 PM

I understand your frustration. Nothing like finally getting to collect your treat and finding out it's a rock. The week will go by fast enough.

DonP · 11-14-2010, 07:39 PM

No fluorescent lamps used for lighting in any of these pics, is there? Tubes or the CF types can cause strange color casts and banding.

ve2vfd · 11-14-2010, 07:39 PM

I know exactly how you feel.

My first 2 K20d's were lemons...

I guess Pentax has NOT gotten their act together when it comes to spotty quality control...

Just hoping my K5 (on it's way) is ok...

Pat

Wheatfield · 11-14-2010, 07:43 PM

Originally posted by DonP

No fluorescent lamps used for lighting in any of these pics, is there? Tubes or the CF types can cause strange color casts and banding.

+1.
Any type of florescent lamp as the primary light source will cause this sort of thing.

secateurs · 11-14-2010, 08:07 PM

Originally posted by Wheatfield

Quote Originally posted by DonP Quote No fluorescent lamps used for lighting in any of these pics, is there? Tubes or the CF types can cause strange color casts and banding. +1. Any type of florescent lamp as the primary light source will cause this sort of thing.

Looks suspiciously like fluorescent lighting with high shutter speed to me...

Raylon · 11-14-2010, 08:37 PM

Yea, looks exactly like fluorescent lighting. Do some outside tests to be sure though...

Wheatfield · 11-14-2010, 10:45 PM

Originally posted by ve2vfd

I know exactly how you feel.

My first 2 K20d's were lemons...

I guess Pentax has NOT gotten their act together when it comes to spotty quality control...

Just hoping my K5 (on it's way) is ok...

Pat

You don't know for sure if it isn't the light or not. Let's wait for the OP to tell us if the shots were done under florescent light before we make rash statements about QC.

KungPOW · 11-14-2010, 10:47 PM

Yup.

I expect this "problem" will become more and more common, what with everyone using compact fluoescent bulbs combined with high ISO capable cameras.

Seems the first thing people do is to take a high ISO shot of their cat in the kitchen.

That is not banding by the way. Banding is a noise pattern characterised by regular bands of denser (darker) pixels.

Try your camera again at a shutter speed under the flicker speed of your lights. Maybe 1/50 or so. The issue shoud go away.

Also, the clunk you feel when you tip the camera is normal. It is the SR mechanism shifting.

deadwolfbones · 11-14-2010, 10:55 PM

Definitely fluorescents.

sjt_1971 · 11-15-2010, 12:36 AM

Hi,

Yes the lighting is fluorescent, thats what I meant by tube (i should be more clear)

Now before you all shout noob

I do mostly indoor stuff and not come across this problem before.

So a quick test ( no means through) the k5 will band/cast ( just for a better word) with a shutter speed of hundeds (and easy to) - but try as I might the k20d would be a lot higher .

After reading up

I totally understand the "problem" (and I'm sure I've come across it before but forgot).

But anyone get really pronounced blue casts in fluorescent ( monitors etc ), I get really odd pronounced blue specular hi lights on objects if a fluorescent light souce casting even a bit of light on them ( I've seen this in other k5 images tp).

I'll post some images later ( all prepaired for user error to

).

Cheers

cbaytan · 11-15-2010, 01:46 AM

When changing WB seetings, you can see the results on the last picture you have taken on the fly, try outdoor shots with shade settings, with at least .3, 0.7 +EV, (England factor)

and see what happens, blue cast on the computer scene coming from your monitor for sure.

kittykat46 · 11-15-2010, 02:15 AM

When light coming off an LCD screen actually becomes your primary or significant light source, it can wreak havoc with your white balance.

Probably Nothing directly related to the K-5...I've had a tough time working such RAW files coming from other cameras before.

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11-14-2010, 05:36 PM	#2
JeffJS Inactive Account Join Date: Aug 2008 Location: Michigan, USA Photos: Gallery \| Albums Posts: 7,484	Return it for replacement. 60 miles is nothing compared to eating a defective camera.

11-14-2010, 05:43 PM	#3
sjt_1971 New Member Join Date: Nov 2010 Location: south wales Posts: 3 Original Poster	yeah i know, not going to be able to do it for at least a week - never mind first iffy pentax item in 3 years so I guess it was due lol

11-14-2010, 07:00 PM	#4
JeffJS Inactive Account Join Date: Aug 2008 Location: Michigan, USA Photos: Gallery \| Albums Posts: 7,484	I understand your frustration. Nothing like finally getting to collect your treat and finding out it's a rock. The week will go by fast enough.

11-14-2010, 07:39 PM	#5
DonP Inactive Account Join Date: Nov 2009 Location: Indiana Posts: 101	No fluorescent lamps used for lighting in any of these pics, is there? Tubes or the CF types can cause strange color casts and banding.

11-14-2010, 07:39 PM	#6
ve2vfd Veteran Member Join Date: Aug 2007 Location: Montreal, Canada Photos: Gallery Posts: 2,433	I know exactly how you feel. My first 2 K20d's were lemons... I guess Pentax has NOT gotten their act together when it comes to spotty quality control... Just hoping my K5 (on it's way) is ok... Pat

11-14-2010, 07:43 PM	#7
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,987	Originally posted by DonP No fluorescent lamps used for lighting in any of these pics, is there? Tubes or the CF types can cause strange color casts and banding. +1. Any type of florescent lamp as the primary light source will cause this sort of thing.

11-14-2010, 08:07 PM	#8
secateurs Senior Member Join Date: Oct 2010 Location: Adelaide, Australia Photos: Albums Posts: 250	Originally posted by Wheatfield Quote Originally posted by DonP Quote No fluorescent lamps used for lighting in any of these pics, is there? Tubes or the CF types can cause strange color casts and banding. +1. Any type of florescent lamp as the primary light source will cause this sort of thing. Looks suspiciously like fluorescent lighting with high shutter speed to me...

11-14-2010, 08:37 PM	#9
Raylon Guest	Yea, looks exactly like fluorescent lighting. Do some outside tests to be sure though...

11-14-2010, 10:45 PM	#10
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,987	Originally posted by ve2vfd I know exactly how you feel. My first 2 K20d's were lemons... I guess Pentax has NOT gotten their act together when it comes to spotty quality control... Just hoping my K5 (on it's way) is ok... Pat You don't know for sure if it isn't the light or not. Let's wait for the OP to tell us if the shots were done under florescent light before we make rash statements about QC.

11-14-2010, 10:47 PM	#11
KungPOW Veteran Member Join Date: Nov 2007 Location: Vancouver, Canada Photos: Gallery Posts: 1,699	Yup. I expect this "problem" will become more and more common, what with everyone using compact fluoescent bulbs combined with high ISO capable cameras. Seems the first thing people do is to take a high ISO shot of their cat in the kitchen. That is not banding by the way. Banding is a noise pattern characterised by regular bands of denser (darker) pixels. Try your camera again at a shutter speed under the flicker speed of your lights. Maybe 1/50 or so. The issue shoud go away. Also, the clunk you feel when you tip the camera is normal. It is the SR mechanism shifting.

11-14-2010, 10:55 PM	#12
deadwolfbones Veteran Member Join Date: Sep 2007 Location: Santa Fe, NM Posts: 7,451	Definitely fluorescents.

11-15-2010, 12:36 AM	#13
sjt_1971 New Member Join Date: Nov 2010 Location: south wales Posts: 3 Original Poster	Hi, Yes the lighting is fluorescent, thats what I meant by tube (i should be more clear) Now before you all shout noob I do mostly indoor stuff and not come across this problem before. So a quick test ( no means through) the k5 will band/cast ( just for a better word) with a shutter speed of hundeds (and easy to) - but try as I might the k20d would be a lot higher . After reading up I totally understand the "problem" (and I'm sure I've come across it before but forgot). But anyone get really pronounced blue casts in fluorescent ( monitors etc ), I get really odd pronounced blue specular hi lights on objects if a fluorescent light souce casting even a bit of light on them ( I've seen this in other k5 images tp). I'll post some images later ( all prepaired for user error to ). Cheers

11-15-2010, 01:46 AM	#14
cbaytan Inactive Account Join Date: Nov 2008 Location: Trabzon/Turkey Photos: Gallery Posts: 1,010	When changing WB seetings, you can see the results on the last picture you have taken on the fly, try outdoor shots with shade settings, with at least .3, 0.7 +EV, (England factor) and see what happens, blue cast on the computer scene coming from your monitor for sure.

11-15-2010, 02:15 AM	#15
kittykat46 Veteran Member Join Date: Dec 2007 Posts: 923	When light coming off an LCD screen actually becomes your primary or significant light source, it can wreak havoc with your white balance. Probably Nothing directly related to the K-5...I've had a tough time working such RAW files coming from other cameras before.

Faulty sensor/contacts :(

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