There are many options for digital SLR cameras but the most popular company is Nikon. Nikon offers a range of cameras including moderately priced consumer models starting around $500 and professional cameras reaching upwards of $7000.
The Sealife Cameras company manufactures specialty cameras that are meant for photography underwater. Most of its stock consists of underwater cameras and their accessories.
Opetka manufactures a wide array of lenses, filters and ancillary products for point and shoot cameras. They also focus on production of high end telescopic lenses for SLR and 35mm cameras and have expanded to become a world leader for industrial and mass media optical products.
Jazz cameras are manufactured by a company called Digitac. Their website 'digitac' gives people information about all the cameras they manufacture and where to buy them.
All major camera companies make SLR cameras, as well as digital SLR cameras. My photography teacher always recommended the Promaster 2500PK Manual SLR camera for its ease of use, value, and manual functions.
Yes, it is legal
You can go to Best Buy's GEEK squad and have them assist you with slr cameras. Another option is to go to Amazon.com or Wiki to research your preferences.
One can purchase lenses for SLR cameras through online retailers such as Amazon or eBay. Alternatively, one could purchase SLR camera lenses at a physical store such as Best Buy.
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.
Portability and cost.
Pentax is a famous and established brand which manufactures click cameras at premium quality and offers them at a range of prices to suit many customers.
Nikon
No, not All of them do.