Mamiya 645 Pro-TL - SLR camera - medium - body only Mamiya pioneered the 645SLR system camera in 1975 and has become the world leader in the medium format field The 645 Pro-TL features fast and convenient 35mm handling With a medium format negative size 2.7 times larger than 35mm, complete World-Class Mamiya lens and accessory system interchangeable film magazines and viewfinders, convenient TTL/OTF flash automation and digital back compatibility