Covers the theory in a refreshingly simply manner. Dispels of the myths and points you exactly to what you need to know. Great stuff. This book was purchased on my flying instructors recommendation. Added to my understanding of flying from page 1.
I think this toplight is fantastic value for money. The quality of build is good - the features are great and most importantly the quality of light is great. I was astonished at the level of light from such a small unit and it seems to run forever using very little power. I have used this unit for both stills and video. Unit includes Battery level check, level dimmer and slide in filters (yellow, blue and diffuser)