Note: This comparison contains unreleased lenses based on rumors and leaks. Specs and images are not official and may change.
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Optics
Focal Length
400mm
600mm
Max Aperture
f/2.8
f/4
Focus
Autofocus
Full-time Manual
Distance Scale
Focus Limiter
Physical
Lens Mount
Canon RF
Canon RF
Weather Sealing
Hood Supplied
Tripod Collar
Features
Image Stabilization
Power Zoom
Zoom Lock
Aperture Ring
Breathing Correction
Parfocal
Custom Buttons
4
4
Color
White
White
General
Sensor Format
Full Frame
Full Frame