Nikon's semi-professional DX flagship that defined enthusiast DSLR photography.
The Nikon D300 launched in 2007 as Nikon's semi-professional DX DSLR and became the benchmark for enthusiast cameras. With a 12.3MP APS-C sensor, the same 51-point Multi-CAM 3500 AF system as the D3, and 8fps burst with the MB-D10 grip, it offered professional-level performance at an enthusiast price.
The 51-point AF system with 15 cross-type points was the same module used in Nikon's flagship D3, providing professional tracking capability. The 12.3MP sensor delivers good image quality with the characteristic Nikon colour. Build is magnesium alloy with comprehensive weather sealing and professional ergonomics.
The D300 was a landmark camera that proved an APS-C body could match full-frame handling and AF performance. The D300s added video capability in 2009. Both are now thoroughly superseded by the D500 and later Z-mount cameras.
Cheap used and primarily of historical interest. Check shutter count which is rated for 150,000, the 51-point AF system, and the CF card slot. The D300 was genuinely revolutionary for its era but 12MP and no video make it impractical for modern use. A piece of Nikon's finest DX heritage.