August 15, 2014; This lens is is doing a great job with the interior images of businesses for my Google Maps Business View clients. When zoomed wide to 12-14mm there maybe slight vignetting, it is easy to crop for content.
October 17, 2013. I ordered the back cover for a Canon EF 50mm f1.8, Canon part CY1-2394-010, from Global Electronic Supplies in Mississauga for $1.68 plus $7.00 for shipping to cover the circuit board on the camera side of the lens. I have also applied a stack of two very thin 5mm or 3/16″ strips of gaffer tape at 2 places to the inside barrel at the front of the lens to limit zoom to 12mm and remove chance of the mirror contacting the rear element of the lens. There is still noticeable vignetting of the corner of the frame.
The image below was captured using a Canon 10-22mm EF-S lens on my Canon 5DMKIII. I plan to eventually purchase either a 14mm F2.8 L or 16-35MM f2.8 L wide angle lens. Right now I cannot justify the acquisition.
The image was processed in Lightroom 5 to Warm the image and apply other develop steps. I continued to edit in Photoshop CC to downsize the file for posting. (At this time there is a problem with Lightroom 5. When you save an image to less than 33% of original size no noise reduction or sharpening will be applied to exported files.) Before down-sampling the file was treated in Topaz Adjust 5.
This image Data is:
Focal Length 19mm
F Stop F22
Exposure 60 sec
Filter B+W 110 Pro 10 Stop
Here are the steps to use a Canon 10-22mm EF-S lens on a Full Frame Canon camera.
NOTE: You might damage you camera and lens if you try to zoom TOO wide. Ideally while looking through the viewfinder look to the corners to make sure you have no vignetting (darkening of corners).
Again take care not to zoom too wide or less than 14mm to avoid mirror contact with lens during exposure.
There are ultra wide Fisheye lenses that produce circular Fisheye type images on full frame cameras while when used on cropped sensor APS-C camera the top and bottom of the captures are cropped off. When you zoom too wide you will see strong vignetting and when you use single or stacked filters the vignetting is more apparent.
The images below are of lens test cards I have had for several years. You can still see darkening of corners even at 16mm. Much of the darkness can be recovered in Lightroom using Lens Correction tab. All images have had Auto White Balance, and Sharpening applied since these were captured as RAW images. These images are all 1024PX wide with no compression. I have posted 2048 PX and original size 5760 X 3840 PSD on Flicker at Should you want to see larger files.