Consistent underexposure on K10D

RiceHigh · 08-10-2007, 03:16 AM

I have tested *ist D, *ist DS and Canon 300D and those tests are published in my geocities homepage.

I have also tested the ambient light metering systems as well as the P-TTL exposure accuracy of the K100D:-

RiceHigh's Pentax K100D Full Review

Furthermore, I have owned and used 3 units of *ist D body and 3 copies of the DS plus a K100D and a borrowed K10D - all of them are behaving the same, and exactly as what the thread open poster describe, if one really to compare the Pentax to other actually more superior systems in the metering department, namely, Canon and Nikon.

My opinion is simply that it is a fact for Pentax has an inferior metering and exposure system, no matter for ambient light (fixed pattern or not) and the flash system. Of course, you can have a different opinion on that. But just ask yourself, how did you compare different systems and have you actually ever been able to compare them in an objective way?

Originally posted by c.r.brown

Fair Warning Notice: None of those tests show a control group in order to show that the tests are indeed valid, these tests seem to be done with a single istD camera with no mention of wether it had been certified or checked by Pentax beforehand, wether it was a NIB model or other. Neither does it mention what firmware version was used or if it was retested with subsequent firmware revisions. Nor do these specious tests correlate to the K100D or K10D cameras and their associated firmware versions.

And lastly that these tests were 'done' on JPEGs, the entire test conclusion if entirely valid could then be an issue with the internal conversion software from RAW to JPG and not the metering of the camera. if you shoot in RAW you nullify any argument ricehigh may pretend to make.

RiceHigh · 08-10-2007, 03:57 AM

Originally posted by switters

I am certainly not an expert, don't claim to be, and am not making claims about anyone's camera other than my own.

I'm just a guy who had a Canon 20D & 430EX that worked pretty well for him in terms of exposure & metering. I moved to the K10D for its feature set and for the lovely Pentax primes, which I prefer shooting with. All I'm saying is that I'm finding the ambient and flash exposure metering & P-TTL to be much more difficult, for me at least, to get good results with.

Obviously the K10D is a fantastic camera or it wouldn't have so many fans.

I am totally with you here, switters. Pentax would have been a better system if they could improve the exposure accuracy (and AF accuracy and performance as well).

**jfdavis58** · 08-10-2007, 05:37 AM

Yep, that's right: ssspppprrrooooooooonnnnnng!

The sound of the worlds collection of "BS-O-Meters" all going off scale (and out of service) simultaneously!

Originally posted by RiceHigh

I am totally with you here, switters. Pentax would have been a better system if they could improve the exposure accuracy (and AF accuracy and performance as well).

08-10-2007, 05:37 AM	#33
jfdavis58 Site Supporter Join Date: Nov 2006 Location: 13 S 0357397-3884316 Photos: Gallery Posts: 887	Sssppppprrrrrrooooooooonnnng! Yep, that's right: *ssspppprrrooooooooonnnnnng*! The sound of the worlds collection of "BS-O-Meters" all going off scale (and out of service) simultaneously! Originally posted by RiceHigh I am totally with you here, switters. Pentax would have been a better system if they could improve the exposure accuracy (and AF accuracy and performance as well).

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
MZ-7 and underexposure	photolady95	Film SLRs and Compact Film Cameras	89	07-09-2009 09:44 AM
Weird K10D underexposure problem	Kirivon	Pentax DSLR Discussion	9	12-19-2008 04:54 AM
underexposure	karq	Photographic Technique	11	12-10-2008 07:51 AM
K10D underexposure + Pentax Colorado	jshurak	Pentax DSLR Discussion	17	04-12-2008 10:54 AM
K10D - drastic underexposure!!	SupremeMoFo	Pentax DSLR Discussion	26	08-14-2007 01:27 AM

08-10-2007, 03:16 AM	#31
RiceHigh Veteran Member Join Date: Nov 2006 Location: Hong Kong Posts: 1,934	I have tested ist D, ist DS and Canon 300D and those tests are published in my geocities homepage. I have also tested the ambient light metering systems as well as the P-TTL exposure accuracy of the K100D:- RiceHigh's Pentax K100D Full Review Furthermore, I have owned and used 3 units of ist D body and 3 copies of the DS plus a K100D and a borrowed K10D - all of them are behaving the same, and exactly as what the thread open poster describe, if one really to compare the Pentax to other actually more superior systems in the metering department, namely, Canon and Nikon. My opinion is simply that it is a fact for Pentax has an inferior metering and exposure system, no matter for ambient light (fixed pattern or not) and the flash system. Of course, you can have a different opinion on that. But just ask yourself, how did you compare different systems and have you actually ever been able to compare them in an objective way? Originally posted by c.r.brown Fair Warning Notice:* None of those tests show a control group in order to show that the tests are indeed valid, these tests seem to be done with a single istD camera with no mention of wether it had been certified or checked by Pentax beforehand, wether it was a NIB model or other. Neither does it mention what firmware version was used or if it was retested with subsequent firmware revisions. Nor do these specious tests correlate to the K100D or K10D cameras and their associated firmware versions. And lastly that these tests were 'done' on JPEGs, the entire test conclusion if entirely valid could then be an issue with the internal conversion software from RAW to JPG and not the metering of the camera. if you shoot in RAW you nullify any argument ricehigh may pretend to make.

08-10-2007, 03:57 AM	#32
RiceHigh Veteran Member Join Date: Nov 2006 Location: Hong Kong Posts: 1,934	Originally posted by switters I am certainly not an expert, don't claim to be, and am not making claims about anyone's camera other than my own. I'm just a guy who had a Canon 20D & 430EX that worked pretty well for him in terms of exposure & metering. I moved to the K10D for its feature set and for the lovely Pentax primes, which I prefer shooting with. All I'm saying is that I'm finding the ambient and flash exposure metering & P-TTL to be much more difficult, for me at least, to get good results with. Obviously the K10D is a fantastic camera or it wouldn't have so many fans. I am totally with you here, switters. Pentax would have been a better system if they could improve the exposure accuracy (and AF accuracy and performance as well).