for digital cameras which ccd is better - 10 MP with a 1/1.8" ccd or 6Mp with a 1/2.5" ccd?

Answer 1

[Texan - read this]

The 1/1.8" sensor is almost twice as large as the 1/2.5" sensor. The way they name sensors using inverse numbers is confusing.

If simple math were adequate, we could suggest that the pixel density in the 10 MP camera is 262,054 per square millimeter and the pixel density in the 6 MP camera is 295,857 per square milllimeter. This is only about a 12% difference and it is probably too close to call on this basis alone.

As a general rule, the larger sensor will have a better image, though, so since the math points us in that direction, I'd favor the camera with the 1/1.8" sensor. I'm suspecting that it's a Canon Powershot A640 and that is a terrific camera.

If you post a new question with the brand and model of the actual cameras you want to compare, we can give you a better answer or guide you to some on-line reviews to help make your decision.

Answer 2

Depends on the manufacturer.

CCD's aren't everything. For example, I have 2 cameras: a Canon SD600 (6MP) with a 2.5" sensor and then a Canon G6 (7.1MP) with a 1.8" sensor. However, the G6 takes much clearer pictures despite its smaller sensor.

I would base the quality of the camera on the type of body style. Personally, I wouldn't advise buying a 6MP ultra compact camera for a primary camera. Those are reserved for people who want a 'take anywhere' camera without much emphasis on quality.

The 10MP seems better, but again, I don't know the type of camera you are working with. Check out this site for reviews and user feedback on cameras.

http://www.dpreview.com/reviews/default.asp?view=alpha

Good Luck!

EDIT: my mistake Alan, I did get those turned around