Question Regarding K10D software version 1.31 Meter Problems

crashmars · 11-25-2011, 10:40 AM

Are there meter problems with manual lenses with version 1.31 for K10D?

**Lowell Goudge** · 11-25-2011, 10:59 AM

Are there problems you ask?

Where have you been for the last 5 years?

Sorry for the sarcasm. But when I get a chance I will post a link to the issues. To be short about it, the K10d and K20D suffer badly from metering errors with manual lenses,

I have posted a plot that shows the errors, but breifly, at F1.4-2.0 you can expect it to under expose by about 1.5 stops, improving from F2 to F5.6 where it mets correctly to F11 whe it over exposes by about 2 stops, before setting back to 1 stop over by F32

here is the graph

what the graph shows is that the metering on all DSLRs has errors with manual lenses (the test sample is a K50/1.4, and that the *istD is the best at metering over the entire aperture range.

It can also be seen that the K10D metering can be largely corrected, by installing the *istD screen (type LL-60 I believe)

AgHalide · 11-27-2011, 03:10 PM

I had a K10d a while back and used manual lenses a lot. Generally you need to use the exposure compensation to fix this - I found that it was way off in low light situations...

11-25-2011, 10:40 AM	#1
crashmars Junior Member Join Date: Sep 2008 Location: rockisland Photos: Gallery Posts: 35	Question Regarding K10D software version 1.31 Meter Problems Are there meter problems with manual lenses with version 1.31 for K10D?

11-25-2011, 10:59 AM	#2
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,888	Are there problems you ask? Where have you been for the last 5 years? Sorry for the sarcasm. But when I get a chance I will post a link to the issues. To be short about it, the K10d and K20D suffer badly from metering errors with manual lenses, I have posted a plot that shows the errors, but breifly, at F1.4-2.0 you can expect it to under expose by about 1.5 stops, improving from F2 to F5.6 where it mets correctly to F11 whe it over exposes by about 2 stops, before setting back to 1 stop over by F32 here is the graph what the graph shows is that the metering on all DSLRs has errors with manual lenses (the test sample is a K50/1.4, and that the istD is the best at metering over the entire aperture range. It can also be seen that the K10D metering can be largely corrected, by installing the istD screen (type LL-60 I believe) Last edited by Lowell Goudge; 11-25-2011 at 12:23 PM.

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11-27-2011, 03:10 PM	#3
AgHalide New Member Join Date: Nov 2011 Location: Nedlands Posts: 11	I had a K10d a while back and used manual lenses a lot. Generally you need to use the exposure compensation to fix this - I found that it was way off in low light situations...