'Canon DO' lens range with green ring - What does the green ring mean?
If you've been on the hunt for a new digital SLR Canon lens lately, you may have noticed a range that has a green ring. For example, Canon's EF 70-300mm f/4.5-5.6 DO IS USM lens, shown in the image below, has a green ring.
The green rings means it comes from the DO range of digital SLR Canon lenses. The letters DO stands for diffractive optics. I won't go into the technical details of how these lenses work, as this information is already listed on a wikipedia article about Defractive Optics. In short, what it means is that the lens contains superior characteristics that allows it to take sharper photographs. Furthermore, DO lenses are smaller and lighter than non DO lenses.
Is a DSLR Canon lens with a green ring (DO) as good as one with a red ring (professional L series)?
Canon DO lenses are not considered as good as their professional L camera lenses, however they are very close. As noted earlier, the main advantage being smaller dimensions and lighter weight. However, there a few gripes as well. For example, many photographers have noticed problems with lens flare or bullet hole patterns seen within the bokeh from time to time. Some like the bokeh effect, others don't. You can read some discussions on defractive optics and view examples of photographs taken with them at the flickr DO IS USM group.
New iPhone App that will improve your DSLR Photography.
Created by SLR Photography Guide!
Dedicated to helping you better understand your Digital SLR Camera:
Search SLR Photography Guide
Our iPhone App
NEW PHOTOGRAPHY TIPS
How to photograph waterfalls and streams
How to choose the correct ISO setting
Learn about animal photography
Learn about partial metering
Shooting spectacular photos of clouds
What is the best portrait lens
When to use spot metering
Wedding photography tips for amateurs
How to photograph moving objects
Tips for selling stock photography
How to get into Shutterstock
How to photograph lightning
- ISO camera settings
- Shutter speed
- AV mode
DSLR photography tips
Photo editing software
DSLR for beginners
Night Photography Settings
Macro photography tips
FREE PHOTOGRAPHY EBOOKS
SLR camera settings explained
Digital photography tips
Photoshop tutorials for photographers
About SLR Photography Guide
Chat with me about photography on Facebook
© 2007 - 2013 Tanya Puntti - SLR Photography Guide