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Additional noteworthy features of the Canon EF 70-200mm f/4L IS II USM include:

One fluorite lens and two UD lenses helps to provide high-image quality
Minimum focusing distance shortened from 1.2m to 1m (3.9ft to 3.3ft)
Super Spectra Coating technology and optimized lens element placement helps minimize ghosting and flaring
Circular nine blade aperture producing a beautiful bokeh quality, ideal for portrait shooting
Lens features 20 lens elements in 15 groups
Fluorine coating on front and rear elements helps to reduce smears and fingerprints
Inner focusing system with Ring Ultrasonic Motor
Preorder the Canon EF 70-200mm f/2.8L IS III: B&H Photo | Amazon | Midwest Photo* | Adorama

Preorder the Canon EF 70-200mm f/4L IS II: B&H Photo | Amazon | Midwest Photo* | Adorama

*Midwest Photo is offering two free years of CarePAK with all prorders.

Canon EF 70-200mm f/2.8L IS III USM

The new Canon EF 70-200mm f/2.8L IS III USM is an ideal lens for professional photographers who shoot with the Canon 1D and 5D series of DSLR cameras. The inclusion of Air Sphere Coating (ASC) technology helps to reduce flaring and ghosting, and suppresses the reflection of light.

Additional noteworthy features of the Canon 70-200mm f/2.8L IS III USM include:

Optical Image Stabilizer up to 3.5 shutter speed stops of correction
Fluorine coating on front and rear elements helps to reduce smears and fingerprints
Inner focusing system with Ring Ultrasonic Motor
One fluorite lens and five UD lenses helps to provide high-image quality
Minimum focusing distance of 1.2m (3.9ft)
Lens features 23 elements in 19 groups
Circular eight blade aperture



https://www.the-digital-picture.com/...-USM-Lens.aspx

https://www.usa.canon.com/internet/p...f-4l-is-ii-usm

https://www.usa.canon.com/internet/p...-8l-is-iii-usm