|Nikon Df, image from Wikipedia.|
Compared to the AE-1 Program I remember fondly from my commercial picture-taking days, my 20D is an enormously powerful machine, with a range of abilities and adjustments that would have been almost literally unbelievable to Early-'90s Me. And yet...
|Canon 20D top controls|
"Quick! Adjust the aperture manually! Do it now!"
Most of those abilities go unused. The 20D largely spends its time acting as a huge, heavy, program-mode Point-'n'-Shoot with interchangeable lenses. You can "drive stickshift" with the camera if you want, making a whole host of manual control inputs and adjustments, but it's like the clutch pedal's in the glovebox and the shift lever is out on the left front fender somewhere.
|Aperture ring on Nikon 43-86mm F/3.5 AI|
|Film speed setting on Canon AE-1 Program|
|Shutter speed dial on Leicaflex SL|