The zoom lens my wife likes to use somehow ended up with a hair trapped inside, which showed up on pictures. Either that or the greasy marks it left on the lens elements.

So I took the whole lot apart, cleaned it up and put it back together, and it works. Rather sodding difficult it was too. There was one bit I couldn’t figure out where it was supposed to go, but I found a place it fit. No idea if it’s right.

What has made you pleased with yourself lately?

How did you refill the nitrogen?

78% should be enough.