Thanks for all the comments!
At the moment my only camera is a Canon Digital Ixus V3

. I've been using a Nikon F601 (I believe it's known as N6006 in the US (?)) but I sold it. I'm going to get a D70 as soon as they hit the stores here in Finland.
I believe this photo was taken with a cheapish 28-200 mm Tamron. My father has some nice lenses so I may have borrowed one of those at the time, unfortunately I didn't keep track of the details.
Here's the color slide in case anyone is interested:
I used just the red channel for the B&W photo, that gave a slight boost to the sky and separated the reds and greens on the ground nicely. I added some more contrast to the sky after getting rid of the colors. Photoshop is grand indeed

.