Nikkon makes a bag for the Nikon D300.
Somewhere between $900 and $1200. The D700 is a professional-level camera.
No, D300 is a crop sensor camera.
D300 may refer to a model number within a given brand. For instance, Nikon offers a model of camera known as the D300. D stands for Digital, while 300 stands for the series number.
No.
I don't know the D300, but similar Nikon DSLRs have a secondary control dial on the front, not far below the shutter button.
The Nikon EH-5A AC adapter is compatible with a range of Nikon camera models, including the D300, D300S, D700, D800, D800E, D810, D810A, D850, and D500. It allows you to power your camera directly from an electrical outlet, making it convenient for extended shooting sessions or studio work.
Yes it is. I use this card with a D300 myself.
The Nikon D300 has video capabilities that allow it to record high-definition videos with a resolution of 1280 x 720 pixels at 24 frames per second.
I know of Nikon D300 and Olympus...
No. Professionals use DSLRs. Even at that, many DSLRs are still just consumer level cameras. D200/D300/D700/D3 are professional Nikons.
The best places to buy a DSLR is your local camera store. The Department stores such as Sears, Walmart, Kmart, Best Buy and others usually have an inexperienced sales people with limited accessories and higher prices. Stores like Cameta Camera usually have low prices, a wider variety of cameras, accessories and a more experienced staff.