Hi There, below are some of the reputable shops you can visit to buy your camera stuff.
CP-1: Cathay Photo, #01-11/14 Peninsula Plaza (Main) Tel: 6337-4274
email@cathayphoto.com.sg
CP-2: Cathay Photo, Peninsula (Printer Section) Tel: 6338-7783
email@cathayphoto.com.sg
CP-3: Cathay Photo, Peninsula (Tripod Section) Tel: 6338-0451
email@cathayphoto.com.sg
CP-M: Cathay Photo, # 02-215/216 Marina Square, 6 Raffles Boulevard Tel: 6339-6188
email@cathayphoto.com.sg
MS: MS Color, Block 711 Ang Mo Kio Avenue 8, #01-3501CTel: 6457-6380
sales@mscolor.com.sg, with e-Quote
TK: T.K. Foto Technic, 100 Beach Rd, #02-45 Shaw Towers Tel: 6292-8167
sales@tkfoto.com.sg
LC: Lord Camera, 304 Orchard Road #01-79 Lucky Plaza Tel: 6235-4605
lordscom@singnet.com.sg
JO: John 3:16, #05-37 Funan Digitalife Mall Tel: 6337-2877 / 6337-1897
richardgan@pacific.net.sg
TCW: The Camera Workshop, 3 Coleman Street #01-31 Tel: 6336-1956 / 6336-7808
tcwkshop@singnet.com.sg
AP-F: Alan Photo, #05-20 Funan Digitalife Mall Tel: 6883-0922
alanfoto@singnet.com.sg
AP-S: Alan Photo, #01-38 Sim Lim Square, Tel: 6336-0922
alanfoto@singnet.com.sg
OP: Orient Photo, #06-31/53 Sim Lim Square, Tel: 63391035
sales@orientfoto.com.sg
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Basically, the most common filter is the UV filter. This kinda filter is used to protect the lens from scratches and dust particles (Do note that its cheaper to replace the filter than to replace the lens itself). As for prices, you need to call up the above shops to get a quotation as clubsnap does not have a compilation for filter prices.
Do note that some filters are somewhat more expensive than others. (eg. B+W filters & Hoya HMC, therefore when quoted do not be alarmed that you are ripped off). These filters are often favoured by other Clubsnappers. Do note that if you are not using a really expensive lens, it might not be worthwhile to get the above examples. In fact $10 UV filters still works.