While we are unable to recommend any patricular shop for passport photos, in our exerience the following shops will generally produce acceptable quality passport photos.
It is recommendaed that you also request a digital .jpg copy of your passport photo.
231 Bain Street, Bras Basah Complex
531 Upper Cross Street, Hong Lim Complex
302 Tiong Bahru Rd, Tiong Bahru Plaza
Please ensure you have read the Australian Passport Office Photo Guidlelines before getting your photo taken.