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12-12-2009, 01:14 AM   #1
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Standard minimum ISO 400 on K-x

Hi,

It's my first Pentax, until now I had only Canons.

A very strange thing happens, standard settings have a minimum ISO of 400 (cannot set it lower than that), and with extended ISO activated, I can set it to ISO 200, even in manual mode, but not to ISO 100.

Is this a bug or is my camera defective?

12-12-2009, 01:56 AM   #2
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I hear this is due to turning on highlight and shadow correction.
12-12-2009, 01:56 AM   #3
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When "Highlight correction" is ON, minimum ISO is 200.
Handbook p. 189
12-12-2009, 02:02 AM   #4
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Thanks a lot, now it is clear for me. I feared there is a problem somewhere.
I confirm that this is indeed because I turned highlight correction on.

12-12-2009, 06:19 AM   #5
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The hightlight correction (and moreso) the lens distortion correction will also cause longer memory card writing times...in case you-ve been noticing that and wondered why its taking a couple of seconds to clear the camera buffer!
12-12-2009, 06:51 AM   #6
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if i only shoot in RAW, can i turn these settings off?
12-12-2009, 09:40 AM   #7
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QuoteOriginally posted by greymda Quote
if i only shoot in RAW, can i turn these settings off?
Yes, you can turn them off, see the manual.
Keep in mind that Highlight Correction affects the RAW, so it may be useful even for RAW.
12-12-2009, 10:39 AM   #8
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QuoteOriginally posted by blende8 Quote
Keep in mind that Highlight Correction affects the RAW, so it may be useful even for RAW.
basically, this was my question. IF these settings affects RAW files, too.

thanks.

12-12-2009, 12:26 PM   #9
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Thsoe settings affect RAW, but in a way that generally requires you to process the files wiht the Pentax software, or else all you'll see is underexposed pictures. Those settings generally work by deliberately underexposing (that's the part that affects the RAW data) and then fixing it up in the conversion to JPEG (that's the part that is JPEG specific and may require Pentax software to emulate if you shoot RAW).
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