Pentax Star Lens - Tumblr Posts

A woodpecker, fluffed up for the Winter.

Shot with a Pentax K-3, 300mm f/4 A* lens

The star Sirius, shot handheld over the course of 20 seconds, with a 300mm lens.

The rainbow effect in the trail comes from the lack of an antialiasing filter on the camera's sensor: you see those colors because those are the specific sub-pixels that were struck by the light as it moved over them.