Works great, easy to install

I hesitated buying this screen because I thought it would be a pain to install. I couldn't have been more wrong. It was so simple; I think I did it in under a minute. The grid works great and has been a huge asset when framing my shots. Overall this was a great purchase!

This should be the default focusing screen that is shipped with every 40D!

The usefulness of the grid lines on this focusing screen grows on me as I use it. This should really be the default focusing screen that Canon installs on every 40D since it is quite easy to ignore the grid lines within the viewfinder if you do not care to use them for reference. Note that the grid lines do not divide the viewfinder image exactly into thirds, if you were expecting some "rule of thirds" composition aid here.

The installation instructions are fairly clear; I switched the focusing screen in just a couple of minutes. After screen installation, remember to set the 40D to use the "Ef-D" Focusing Screen option: (1) From the Menu, go to the Custom Function Set IV (Fn IV : Operation/Others); (2) Select and set the (1 : Ef-D) option.

One thing that is not mentioned in the installation instructions is that the Canon-Europe Web site actually has a nice video how-to that describes how to replace the focusing screen: cpn.canon-europe.com\content\masterclass\eos_40d_focus_scree  more

A great way to help you compose you shots

This grid focusing screen is a very simple and affordable accessory for the 40D. I was a bit worried about installing the screen myself, but the provided instructions were clear and concise. The screen also comes with a specialized tweezer tool that unlocks the screen clamp in the camera and allows you to grasp/manipulate the old and new screens without getting finger prints on them or your interior camera parts.

Also, it only takes a couple of minutes to make the switch, so you can go back to the original screen with ease. Just remember to tell the camera that you are switching screens-- the screen-type menu in in the custom functions menus.

Trifocal wearer

Canon EF-D Focusing Screen for Canon EOS 40D Digital SLR Camera As one who wears trifocal eyeglasses I sometime have difficulty seeing that things are perpendicular and horizontal in the viewfinder (at least that's my excuse, age may be another factor). Before I switched to a Canon DSLR I used a Nikon 35mm and had several focusing screens that fit that camera. The one I found myself using the most often was the one with grid lines. When I learned that interchangeable focusing screens were an option with the EOS 40D, I decided to move up from the 20D.

I received the EF-D screen yesterday and installed it this morning in less than 5 minutes (It's sure a lot easier than my old Nikon.). The installation instructions are understandable and easy to follow. What I especially like is the size of the tweezers included in the installation kit. They are large enough that people with large hands will not feel like a clumsy fool trying to hold them and grasp the screen.

If you have trouble  more

Excellent add-on for the 40D

This add-on focusing screen includes helpful grid lines that assist in lining up architectural and landscape photos in the viewfinder of the Canon EOS 40D. It was easy to install, and really has helped me improve my compositions.

I first learned about this screen from a book, Canon EOS 40D Guide to Digital Photography, which I consider a must-have "accessory." It has a good mixture of information about the 40D and setting all its options and Custom Functions, as well as chapters on how to use the 40D's features to achieve better photography.