Skip to content

Canon EF 70-300mm f/4-5.6 IS II teardown by LensRentals

EF 70-300mm F/4-5.6 IS II

Canon EF 70-300mm f/4-5.6 IS II: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA

At a glance:

  • EF-Mount/Full-Frame Format
  • Maximum Aperture: f/4-5.6
  • One Ultra Low Dispersion Element
  • NANO USM Autofocus System
  • Optical Image Stabilizer
  • Lens Information Display
  • Full-Time Manual Focus
  • Rounded 9-Blade Diaphragm

All images below ©, used with permission.

LensRentals‘ Roger Cicala and Aaron Close took the new Canon EF 70-300mm f/4-5.6 IS II and opened it, tore it down to all its components.

EF 70-300mm
Image ©

In the conclusion they write:

[…] Canon [is] great at optomechanical engineering, and the Canon EF 70-300mm f/4-5.6 IS II is no exception. And unlike some of their cameras, they don’t seem to have a problem putting all the right features in their consumer grade models. We were impressed by the numerous elements that could be optically adjusted, by the metal collars and rollers, pleasantly modular and robust construction, and the efficient layout.

The new motor is tiny. By claim, it is both fast and accurate, and it appears it will be replacing the STM type motors for use in a lot of lenses. […] I saw nothing about the motor that made me think ‘this is going to fail.’ It’s a real USM with no gear train and by our examination, no glued together pieces that might separate.

Be sure to head over to LensRentals for pictures and step by step description of the teardown.

EF 70-300mm
Image ©
Back To Top


This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the cookie policy.
By closing this banner you agree to the use of cookies.