About UsFor all the information on the Canon organisation  |   Where to BuyLocate your nearest supplier for Canon products & solutions |   Contact UsContact details for Canon's global operations Canon UK
  Products &
SolutionsBrowse your favourite Canon products & find out more about our office solutions		   For Home   For WorkFind out how Canon can help you find the perfect solution for your business   SupportAll the technical & other help you need to get the best from your Canon products  
Home > For Home > Product Finder > EF Lenses

Full-Time Manual Focus
Many EF lenses are equipped with a ring-type USM which allows full-time manual focus in AF mode. This means you can manually fine-tune focusing as soon as auto focus is complete, without having to switch to manual focusing mode. Full-time manual focusing on most compatible lenses uses a mechanical system for instant responsiveness.

Full-time manual focus is also possible on some lenses equipped with a Micro USM, such as the EF 50mm f/1.4 USM.

Click here to find out more about the Canon EF Lens Range and Technology.

 Print this page 

Core Technologies
Aspherical Lenses
Fluorite and UD Lenses
DO Lenses
Super Spectra Coating
Focusing Systems
Full-Time Manual Focus
Ultrasonic Motor
Image Stabilizer
Accessories

Back to Product Range
EF Lenses
  © Copyright - 2011   |   Terms and Conditions of use   |   Sitemap
  © Copyright - 2009   |   Terms and Conditions of use