Nikon SD-9 lens mount_Mamiya 7 The Nikon D300 is a

The Nikon D300 is a sturdy DSLR camera with quick 51-point autofocus and a very good 12mp DX-format sensor- plus continuous shooting up to 6fps (for up to 100 frames)

with an easy to use digital interface

Anyway it's for Olympus OM

with some internal dust and haze

Nikon SD-9 lens mount_Mamiya 7 The Nikon D300 is aThe Nikon SD 9 is a high performance battery pack for Speedlight SB 900 and SB 910 flashes. It accepts eight AA batteries (not included) and connects via a coiled cable to the external power socket of the SB900 910 for faster recharge times and longer life than the four built in batteries. In excellent condition, with beltpack. Flash sold separately.