CindyJ wrote:
Happy Holidays first of all. I've been reading all of your responces and it seems that the majority suggestions for me to update my camera per your advise (now have Nikon Coolpix L110) is either the Coolpix P500 or the camera I was initially considering the Nikon D3100. I'm no camera expert, took one class just to touch base on functions, which I understood somewhat. Still confused on RAW which the instructor explained as essential, and ISO is still confusing to me.
Cindy J.
Lets look at RAW and ISO since youre other requests have been addressed within the threads below.
RAW is a cameras default file saving format, it has the highest resolution and maximum color depth the camera is capable of recording. This format is readable with the cameras digital editing application and is proprietary to the camera manufacturer.
You cannot use most normal image editing software to view and edit RAW images; you need to export the RAW file to .jpg, .tiff, ect. before you can perform any meaningful image editing. Saving an image capture in camera as a RAW file will require more camera processing time and this relates to fewer shots per second for moving objects. RAW files consume much more digital space on your camera memory card and eventually on your computer Hard Drive.
In modern digital cameras the .jpg compression has little image quality degradation on the first save. It used to be true that the cameras .jpg compression would degrade the image quality because the compression ratio was much too great and opening and saving that image several times would result in severe image degradation; this is no longer true today.
In addition to time wasted in camera processing you must spend time on your computer converting a RAW image to a format your image editing software can load and work with, then perform your image editing on that converted file. It is much faster to save the digital capture in the cameras .jpg, or .tiff format at the highest image resolution and then load that file into your computer for direct editing.
Now for ISO. ISO (International Standards Organization) is the value assigned to the sensitivity of the light sensitive device. In the days of film photography it was called ASO (American Standards Organization. Today it has been assigned to both film and digital devices, to represent a universal light sensitive value. ISO values range in Stops from 25, 50, 100, 200, 400, 800, 1600, etc. Note that these steps are double the previous step, and this corresponds to the Shutter Speed Stops, and Aperture Stop values. Each stop will have a corresponding effect on the other values as related to an exposure. If your ISO is 200, your Aperture is /f11, and your shutter speed is 1/250sec. For a correct exposure and you change one value to the next higher level you will affect the overall exposure by one step (increase the ISO from 200 to 400 and your exposure will be one stop over exposed, now if you increase your shutter speed one stop to 1/500sec. You will again have a correctly exposed image.)
Hope this helps a little.
Michael G