I know that when i choose higher iso, the image captured will be sharp and crisp even when in low lighting. but there is too much noise that i can't remove in noise filter. While choosing a lower iso will make the image have less noise but it will get blur (using hand) in the same lighting condition. So, i use a tripod to solve this problem. and it does solve the problem. Anyone know what is actually ISO and what does it means physically?

ISO

Understanding these two things will solve your problems me thinks :-)

Its hard for me to understand the mathematical physics here... but easy to understand the mechanical physics.. i do know the aperture but i still don't understand completely the ISO. I think its about the CCD feature.. the noise happens when the CCD doesn't receive enough light to obtain the accurate color and texture on a certain area on it. So ISO relates with the aperture right?

http://digital-photography-school.com/iso-settings


try here - to see if you understand it a little better

hope it helps.

Now i understand... the only way ( to me ) is to use a tripod.... I don't want any noise or whatsoever, i just want a clean and crisp photos. Even when light is not enough, i just use a tripod, low shutter speed, lowest ISO and wide aperture... and i dont understand why some people want grainy images? Is it a choice between 'noisy but sharp' and 'clean but blurred'...
(sorry for my english. It's not my native languange)

It really depends on the light you have available and the type of shot you want. Clearly, for subjects like portraits you want maximum detail and low noise - the same for landscapes. Don’t think a tripod is always necessary though - careful selection of your settings will help a lot. If you aren’t sure at first - try shooting with aperture priority as your setting on the camera. Then analyze the ISO and other settings the camera chooses to see for yourself and understand the settings a little better. A tripod is not always practical so you need to familiarize yourself with how to get around that.

No one wants chroma noise on their images but some styles of photography suit a little grain - especially monotone work to replicate their film equivalents. Finally, if you have the option to do so, disable or reduce your in cameras noise reduction and use third part noise removal software – preferably in RAW mode - to fix it. In camera solutions tend to be very heavy handed.

I do have RAW capture mode in my camera and i do have third party noise-removing-software. I think i have to do more experiment on my camera after this. Thank you so much. It really helps me.

your welcome.