digital photography iso explained
In digital SLR photography?
Why do digi SLR’S have an ISO rating, when there is no film,
Also can anyone explain in Laymens terms the two mediums: JPEG & RAW, Thanks in advance.
PS: Do you consider the Nikon D300, To be of proffessional quality, or would you just put the money towards a new Nikon D3.
ISO is an indication of the light sensitivity of the image recording medium either film or digital sensor. Making the sensor more sensitive to light affects shutter speed and aperture settings as well as the amount of noise in the image.
http://digital-photography.suite101.com/article.cfm/iso_and_noise_in_digital_images
RAW is the unproceesd image data, no exposure or color temperature corrections added. The camera saves the sugested settings in the image but you can make the final decision later on your computer. Great for high quality low volume shoots.
JPEG is a compressed file where the camera proces the image data and saves it in a smaller file than RAW. Great for situations where you need to shoot alot images, such as an all day sports event .
http://digital-photography.suite101.com/article.cfm/photographic_formats_raw_v_jpeg
Both Nikons are excellent cameras and it really depends on your budget. The D300 would leave more for lenses and essential accesories.
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