They really aren't, not if you know what you're doing and what the Australian Consulate expects from you.
Here's the thing... An Australian Passport photo is required to be 35x45mm - not that unusual - very similar to most of Europe. The head size must fall between 32-36mm from the chin to the top of the skull and taken on a white background. Again, not hard if you're an experienced professional photographer who specializes in foreign or international passport photos.
The "hard part" is the print resolution that Australia requires. They want your passport photos to be printed at 450 to 600 dpi. They will view it under a loop, or a very strong magnifying glass. If the image shows any sign of banding or ink jet printing (a no-no), they will flat out reject the image in a millisecond (because... millimeters, remember?).
Newsome's Studio resolved this by investing in a special printer, just to accommodate Australian and New Zealand Passport Photos. Since then, we've been successfully creating and providing passport photos for our Aussie friends in the Tampa/St Pete market, some coming from as far away as Miami and Jacksonville.
The Australian Consulate in Washington, DC has declared Newsome's Studio of Photography in Tampa as a "Preferred Photographer" for providing Australian Passport Photos.
Located in North Tampa (Carrollwood) at 10012 N. Dale Mabry Hwy, Suite 219 in Cypress Point Office Park (corner of Linebaugh and N. Dale Mabry behind Starbucks), you can receive your high quality passport photos in a matter of minutes.
All work guaranteed, and by appointment only. 813-968-2810