The Hasselblad 500 EL is a medium format film camera introduced in 1965. It is essentially a 500 C with a permanently integrated motor drive in the baseplate, which was a helpful feature for quick shooting due to the 500 C's lack of an instant-return mirror. The camera body includes settings for normal operation, automatic continuous mode at 1 fps, and various speed modes for continuous mirror-up operation. The 500 EL was famously adapted by NASA for the Apollo moon program, with some units remaining on the lunar surface. It was succeeded by the 500 EL/M in 1971.