I’ve been heads-down the past few weeks, working hard on the 9th edition of Complete Digital Photography. Last week, I was proofing the section of the book that covered reciprocity and the exposure triangle, and, in a little bit of synchronicity, my good friend Hudson Henry posted this cool video on that very topic. Hudson and his friend Andy Adkins — a true video wizard — did a fantastic job explaining the relationship between ISO, aperture and shutter speed. It’s worth a few minutes, especially if the topic is something that remains a bit confusing to you, or if you want a refresher.

For those of you who have been waiting patiently for the 9th edition, we really are in the final stages. You can find out more — and download a free sample chapter — via this link. I’ll post an update once we get our final proof copy from the printer, which should be later this week.