I have to bring a photo from 41.6kb down to 2mb
It depends on the size of the mp3 file. They can range from 2MB to 10MB. So obviously if the average size of your files is 2MB you'll get about 8 files, and if it's 4MB you'll barely get 2 files !
jpeg or jpg is standard for pictures and have smallest file size, usually used for web but you can print those images too.
usually it will well you the size of the image in the email editor, Anything bellow 2MB is 0k for an email
Small in size, good quality, mostly used.
JPEG images (jpeg, jpg) use compression formats to reduce the data file size for digital images. While this causes a loss of image quality, it enables images to be more efficiently stored and transmitted.
Usually pictures of JPEG or BMP occupy more space than the GIF which occupies the low space. In JPEG and BMP there is space for the background also.
Approximately.... 1MB = 200KB 2MB = 400KB
Use a software to compress the images and resize the photos for email.
For an 8 megapixel camera I would suggest a 2MB memory card,
I assume we are talking here about JPEG images. The reason is very simple, the final size of the JPEG depends on the compression ratio, other JPEG parameters and the image content itself. Therefore in digital cameras for example they trade image size for speed using a weaker compression scheme, while personal computer programs use more complex algorithms obtaining better image sizes.
The size of a JPEG file depends on the compression algorithm and on the content of the source image. There is no direct answer to you question. What you can do to find it out is to capture the screen, then use mspaint to save the file as a bitmap and after that convert the bitmap to a jpeg using an image converter that allows you to play with the jpeg parameters - for example AZImage. See also related questions and links.