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Anonymous Posted on Sep 11, 2005

S75 Can firmware be set for ISO 50?

Here is a question that I don't believe I've seen before. Pardon my inexperience, but a lot is said over at the Canon forum about the G1's capability for an ISO 50 setting to achieve astoundingly low noise. I believe the claim if you look at the images from the acclaimed G1 expert named Pekka Saarinen, whose site has examples mostly shot at ISO 50. Check it out: http://studio-on-the.net/photography/G1/index.html Now if the Sony 3.3mp chip is used in both the G1 and the S75, why wouldn't Sony tap into this low noise arena by sending out a firmware update for the S75 that would extend the ISO range down to 50? Can it be done? Is there merit in this? Seems like a real advantage. BTW, I'm still buying an S75 when they ship. I just love the color accuracy and, yeah, I like having the actual Zeiss name on the lens. I feel I'm getting the best QC effort. Thanks for your comments. -- Tom (AZ)

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I see this from another perspective. What would they do to support ISO 50 with electronic image sensors ? For given shutter speed and aperture, the number of electrons in the CCD cell is independent of ISO setting. So, I guess ISO control is done by adjusting the gain factors in the firmware or ADC circuitary. Now, I'm proposing this experiment. By setting the EV adjust +2 or so, you intentioanlly make the image over exposed. Then take the picture to a image editing software and adjust down the level. Except the saturated areas, the image should be the same as it would be at lower ISO ! By going through this process, you have reduced the relative noise level. And that's why lower ISO images are cleaner.

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  • Posted on Sep 11, 2005
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If Sony didn't anounce it- you won't be getting it.....ever. That's just the way it is with Sony. Buy their camera today and buy their newer camera tomorrow... there just is no middle ground. They don't ever issue firmware upgrades, sorry. This is in stark comparison with Canon which is well known for their product support and upkeep. Imagine, they even sent all their 8200 customers a free batch of their newer inks! FCOL ( that's "for crying out loud" ;^) The S800 will definitely be my next purchase and hats off to Canon for at least "caring" for their patrons.

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