A Canon 100-400mm lens will cost you around 60,000 baht and will fit in a rucksack. The Panasonic 45-200mm (effective 90-400mm on a M4/3 camera) will cost you around 12,000 baht and will fit in your pocket without anyone thinking you are pleased to see them.
Image quality is pretty good. The first of these shots is at 103mm, the second at 200mm. Panasonic GF1.
