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 Post subject: ISO on different cameras
PostPosted: Mon Apr 06, 2009 8:04 pm 
Came to thinks about a thing yesterday when I was out taking pictures with a friend. He owns a Sony a200 which features a CCD sensor, I myself have a D90 with a CMOS sensor. The thing that came to my mind was why my D90 has a Standard ISO of 200, and the a200 has a standard of 100. Even through the D90 can be lowered until an equivalent of ISO 100, it is set to 200 or higher in auto mode.
And as the classic rule goes: Lower ISO = less noise/better images, I can't stop to wonder why nikon didn't set the ISO to 100 as standard? Wouldn't that create slightly better images?

Anyway the only suggestion I have is that A CMOS sensor is better to achieve light then a CCD, meaning that the CMOS in standard mode has an equivalent ISO of 200, and the CCD 100...

Please help me figure this out!

PostPosted: Mon Apr 06, 2009 8:10 pm 
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Joined: Sat Sep 30, 2006 4:30 pm
Posts: 9886
Location: UK
Hi bigblocke,

Does my thread Know your native ISO help? BTW, what I termed "native ISO" is often referred to as "base ISO".


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 Post subject:
PostPosted: Mon Apr 06, 2009 8:46 pm 
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Joined: Sun Feb 15, 2009 12:59 pm
Posts: 6010
Location: The Netherlands
From what I've read, the 200 ISO on the D90 is the native ISO, whilst 100 ISO is "fake". There were some comparison shots showing a more grainy image at 100 ISO. ;)

I take pictures so quickly, my highschool was "Continuous High".

 Post subject:
PostPosted: Tue Apr 07, 2009 12:53 am 
I read some magazine and some camera's can handle 200 ISO correctly and to think if CMOS can handle ISO 200 its not a problem...

This is what we will think in taking picture if we are not anoyed w/ grains or we can't see noise in ISO 200 its not a problem...

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