An aperture ring affects the SLR camera because you turn it to adjust light and focus.
This stands for 'Aperture'.
The EOS Digital Rebel XT SLR is great for beginners.
Single Lens Reflex
Single Lens Reflex.
functions of the principal components of a digital SLR camera
SLR stands for Single Lens Reflex - if it doesnt say digital then its probably a film camera (35mm).
Actually, aside from wide-angle or wide-aperture interchangeable lenses, there is little to recommend a digital SLR over other digital cameras these days and new non-SLR cameras are starting to have interchangeable lenses. A number of digital cameras include a 'viewfinder' screen in addition to the large back screen...both show exactly the framing of the image that will be captured. In one sense these cameras are BETTER than a SLR because, in the manual mode, the latter always show a view even though the exposure settings may be incorrect. Most of the popular SLR digital camera also have an option to show the view on a large digital back screen. An SLR camera offers a much wider variety of lens selections and are the camera of choice for most serious amateur photographers and all professionals.
Yes, the Nikon D90 Digital SLR has image stabilization.
No
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.
If you want the best SLR digital camera, I would suggest you check out Best Buy or Fry's electronics. They both have the best deals in SLR digital cameras and come in a good affordable price.
canon and olympus are leaders in digital slr cameras and they have very wide range of lens options.