Still / Video Cameras
• Screen and touch functionality
• Sensor cleanliness
• Autofocus performance
• Accurate exposure metering
• Working buttons, ports, and hot shoe
• Ability to record and play back on a memory card
Lenses
• Autofocus performance across the range
• Condition of optical elements (scratches, cracks, dust)
• Smooth rotation of focus and zoom rings
• Proper operation of the aperture
Sliders / Stabilizers / Motorized Systems
• Smooth and consistent movement
• Absence of looseness or play
• Presence of all screws, mounts, and pads
• Proper motor operation (for motorized systems)