Autofocus Focal Length End Position

Below are 100% crops from the original JPG pictures (picture mode was set to Standard so some sharpness has been added by the camera).

In this test a Canon 450D was used and two lenses (Canon EF 70-200 2.8 L USM and Canon EF 100-400 4.5-5.6 L IS USM) around their respective maxium focal length.

The following configuration was used
• Canon EOS 450D
• Canon 70-200 2.8 L USM
• Canon 100-400 4.5-5.6 L IS USM
• 1/125 s
• F5.6
• ISO100

CANON EF 70-200 2.8 L USM

AUTOFOCUS (200mm vs 195mm)

At 200 mm focal length	At 195 mm focal length

200MM (Autofocus vs Manual)

Using autofocus	Using manual focus

200MM (Autofocus vs Autofocus LiveView)

Using autofocus	Using autofocus LiveView

CANON EF 100-400 4-5-5.6 L IS USM

AUTOFOCUS (400mm vs 370mm)

At 400 mm focal length	At 370 mm focal length

400MM (Autofocus vs Manual)

Using autofocus	Using manual focus