Kenko Extension Tube Set for Canon EF 35mm Camera The Nikon D300 is a

The Nikon D300 is a well built DSLR with quick 51-point autofocus and a very good 12mp DX-format sensor- plus continuous shooting up to 7fps and 720p/24 video capability

Inspired by classic film cameras

But it has a number of unique capabilities that make it worth hauling around: it shoots in the convenient 6x7 image format

It doesn't affect imaging and it's not going to get any worse

Kenko Extension Tube Set for Canon EF 35mm Camera The Nikon D300 is aA set of three extension tubes for Canon EF mount: 12mm, 20mm, and 36mm. These tubes have the electronic contacts necessary to maintain autofocus and autoexposure capabilities. If you're curious about dabbling in macro work, this is an inexpensive way to get started.