Vivitar sell a digital SLR camera that is a 35mm model which can be purchased at Urban Outfitters and is touted as a great camera for either beginners or professionals.
Digital SLR cameras tend to be the higher priced digital cameras. During some searches, I found prices for digital SLR ranging from $598 to $1,200. If you have a particular brand in mind, check with the manufacturer to see if they have refurbished units available. Refurbished unit have full warranty but usually are cheaper.
SLR digital cameras are professional grade cameras which have settings which may be manipulated to produce outstanding photos that otherwise could not be achieved with a regular digital camera
Digital SLR referes to "digital single-lens reflex." This terminology is often used when speaking about cameras. Such cameras can allow the photographer to change lenses as he or she sees fit.
Nikon
Currently, there are three major comparison sites for digital SLR cameras on the web. Those sites are Snapsort, What Digital Camera, and DP Review, which is probably the most comprehensive of the three.
canon and olympus are leaders in digital slr cameras and they have very wide range of lens options.
The best brands for digital SLR cameras are: Epson, Canon, Casio, Axis, JVC, Java, Lenovo, Panasonic, Olympus, Medion, Nikon, Samsung, Sony, and Sanyo.
Yes, your sister can purchase a SLR and DSLR camera online. She can go to the Best Buy website and create an account. Once she does this, she can view various SLR cameras available and purchase one with her account.
No, film single lens reflex (SLR) cameras exist, albeit obsolete. Currently all commercial single lens reflex cameras are digital, however, it may be possible to find a retailer or more likely, a private seller in possession of a functional film SLR camera.
Reviews and ratings for digital cameras are available on at the Digital Photography Review. Alternatively, for a small subscription, the Which site offers ratings and reviews of both digital and SLR cameras as well as many other consumer electronics.
The difference is the lens, auto-focus, color and sharpness / detail of the picture, but this only depends on the two cameras that you are comparing.
A Pentax Digital SLR camera can be purchased at any local electronics store. Pentax Digital SLR cameras can also be purchased from online retailer such as Wal*Mart, BestBuy, and Amazon.