Opteka RC-3 Wireless Remote Control for Sony Alpha A33, A55, A57, A65, A77, A99, NEX-5, NEX-6, NEX-7, A230, A330, A380, A390, A450, A500, A550, A560, A580, A700, A850, A900 (RMT-DSLR1 Replacement)

Amazon.com Price: $7.95 (as of 08/08/2019 18:42 PST- Details)

Allows for shutter release up to 16 feet
Instant or 2-second shutter release delay
Makes group photos easy

Usually ships in 24 hours