There are still some photogenic "old" streets in Singapore's Chinatown (rather ironic to have a "Chinatown" in a city that is what 2/3 ethnic Chinese, but there you go...). There are several chunks of old shophouses that have been converted into restaurants, homes, boutiques, and such that can be photogenic, and they usually provide a good respite from the sun as most of them have arcades in front that overhang the sidewalks.
Another good camera store is Cathay Photo, which is down on Raffles Boulevard near the Esplanade. They have a separate used equipment department in the same building if memory serves, or perhaps I'm getting them confused with another store. There are several within walking distance of each other in that same area.