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Old May 13, 2004, 7:22 PM   #21
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lostlogic wrote:

Alkaline: 3000mAh*1.5V*2=9W
NiMH: 2000mAh*1.2V*2=4.8W
Li-ION: 1100mAh*3.6V=4W

I think the fallacy here isprobably the shape of the battery discharge curves andthe type of power supply used in the camera.


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Old May 14, 2004, 10:34 AM   #22
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Ok, yeah my math was fishy ... I didn't realize there were 4 batteries in the 750 ...

However, I'm a bit surprised to hear that a charge of the NiMH would last longer than Alkalines ... Does anyone who knows more about batteries than I do know how/why this would be?
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Old May 21, 2004, 8:34 PM   #23
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Hello

style="BACKGROUND-COLOR: #000000":?I am still a little bit confused on what to purchase. either the C 750 (now discontinued in Australia), the C 770 or C 765. I have also considered the HP photosmart 945, as i currently own a HP 120 (1 MP Camer, which too ok to good pics).

http://www.pbase.com/cameras/olympus&sort=photos

I observed the sample photos from the above link and I was most impressed with some of the photos from the C 750, most of the Photos from the C 770 were good but some seemed blury... but maybe the people who took them were not so familar with the camera. My main photography interests are weather related, storms, snow, frost etc, and in general outdoor nature shots, so low light isnt much of a concern, thought I SAW excellent low lght shots from the C 750...

Aside from Steve's reviews, I also read:

http://www.dcresource.com/reviews/ol...ew/index.shtml

http://www.dcresource.com/reviews/ol..._770uz-review/

http://www.megapixel.net/html/issueindex.php?lang=en

Cheers

Sam
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Old Jun 7, 2004, 9:58 AM   #24
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I would like to ask those who have c750 and have experience with C770, if the ISO 50 of C750 better than ISO 64 of the C770. Please postyour feedback. Thanks:-)
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Old Jun 7, 2004, 5:48 PM   #25
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http://dpfwiw.com/batteries.htm

For an informed discussion of batteries.
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Old Jun 7, 2004, 7:42 PM   #26
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lostlogic wrote:
Quote:
Alkaline: 3000mAh*1.5V*2=9W
NiMH: 2000mAh*1.2V*2=4.8W
Li-ION: 1100mAh*3.6V=4W

So yeah, the Alkalines kick the crap out of the rechargables, no surprise there, but between the significantly heavier NiMH and the Li-ION, it is pretty close. Also, the Li-ION lets the camera get faster flash charge times, because of the higher max current draw on the battery.
It may look that way, but it's not. I've used 1600mAh NiMH batteries that last twice as long as 2500mAh alkalines, and there is a REAL reason:

Alkalines & NiMH batteries havedifferent discharge characteristics. NiMHs hold their voltage and current for a long time and then die. e.g. They hold the voltage at 1.1-1.2V at high discharge rates until they're 90% discharged, then they taper off quickly. With Alkalines, thevoltage drops more gradually, so they start off at 1.5V and taper off fairly linearly. At high discharge rates, the voltage may drop from 1.5V down to 1.1V at only 30-40% discharged. Digital cameras will cut out when each cell is a bit above 1V.

Alkalines are designed to discharge at fairly slow rates. NiMH have much better performance at high discharge rates.

If you've used Alkalines in a digital camera and the camera says replace them, don't throw them out!!!! The have discharged enough not to work your camera, but they will work quite happily on lower discharge devices(e.g. an LCD clock,etc)for many, many months after that.
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