What is so important about 2048?

• This is the size in pixel of photos you can upload to google+ for free (as long as the longest side of your image is 2048 or smaller the image can be loaded and does not count against your 2GB limit.
• It is also the size of the DNG files (again the longest dimension) stored as the smart previews in Lightroom 5 beta.
• 2058 by 1536 is equivalent to 3.1 megapixels
• Most current smart phone cameras are around this size, or a little larger.
• Probably Ok for a 10" by 8" blow up.
• Definitely fine for a 6" by 4" print.
• It is bigger than necessary for an email or blog post.

Dimensions in pixels	Mega pixels	Jpeg File size	DNG File Size
2048 X 1536	3.1	0.5-1MB	1.2-1.8MB

 If you click on this photo you will see what 2048 by 1361 looks like on your screen. Big isn't it

Photos that are 2048 across apparently are now considered Standard Size! (at least for the web)