im intending to buy a dslr from pentax singapore, would i need to pay tax? does the asean trade agreement works making it tax free ? they are using fedex btw

dont count on it

Could well be cheaper to fly there and bring it back yourself, the big courier companies like FedEx, DHL usually charge the maximum possible and on a camera that could be a fair few baht!

If you tell me the HS code, I might be able to find it for you.

But keep in mind that you have to add the import tax from the cost of product + shipping cost total sum. Moreover, a 7% VAT tax will be added to that!

for the free trade you need the Form E where the Singaporean government guarantees that it was produced in Singapore.

I doubt the sender can provide that.