This is one of most beautiful stellar dendrite crystals i captured past winter, but it was hard to process because of aligning problems (it shifted and rotated during serial shooting). It's diamater around 5-6 mm.
8 serial shots averaged to boost signal-to-noise ratio. Background: dark woolen fabric, natural light (gray clouded sky), external optics Helios 44M-5, january 2013, Moscow.
More snowflakes in set snowflakes and snow crystals
Also i wrote small article about my shooting technique