In terms of the rated "life span" of cameras such as the 5D mark II, it is less a concern than with entry level cameras such as your T2i. There are two reasons for this. 1) The shutter life rating of the 5DII is higher at 150,000 than the 100,000 rating of the T1i, the last Rebel to even have a shutter rating. 2) Shutters are replaceable. Canon EOS 5D Mark III. Canon EOS R. Canon EOS 6D. Canon EOS 5D Mark IV. Canon EOS 7D Mark II. Canon EOS 6D Mark II. Canon EOS M50. Canon EOS 5D Mark II. Canon PowerShot G7 X Mark II. Canon EOS 7D. Canon EOS 2000D. Canon EOS 600D The Canon 5D is sharper than the $5,000 Nikon D3 or D700, and the 5D sells for about $800 used. The Canon 5D was the world's best portrait and landscape camera for under $8,000 in its day, and today, still a steal. The images look fantastic, and it runs forever on a single charge. Unlike pro cameras, it's light enough to want to take in your dn081B.