It is difficult to adjust shutter speed and f/stop because controls are so close together.
Retractable lens hood covers shutter and f/stop controls when filter is attached.
It is easy to waste a shot when picking up camera and accidentally pressing the shutter release on front of camera.
The shutter release lock on the front of the camera locks both shutter releases.
There is no “B” shutter speed.
The “T” setting is used for long exposures, however, to get shutter to close, you must turn the shutter speed ring or move the film advance lever.
There is only an “X” sync (no sync for flash bulbs)
Camera focuses in the opposite direction of my Nikon lenses.
Focus scale only in meters.
The f/stop ring rotates in the opposite direction of the Nikon lenses.
The right side camera strap sometimes gets caught when closing the camera back resulting in light-struck film.
Shutter speed cannot be set between click stops. Must set only at click stops.
It is easy to forget to focus camera.
Film door for the 690 is a little tight