Hoodman Eyecup Recommended!

[motleypixel]

I've been using a Hoodman Eyecup on my 5D Mark II and 40D for a good while now and I really like them.  They are ambidextrous so you can turn it 180 degrees to suit you eye positioning.  I like it a lot because it blocks out all of the periferal light that can enter around the eye and eye cup.  The only two draw-backs:  1.  Part of the eye cup blocks some of the LCD screen (not much and you get used to it).  2.  Probably won't work for eyeglass people.

Here's the different version on Amazon:

Hoodman Eyecup

[DigitalScape]

I also use an eye cup on my camera.  For me, it make the camera-eye connection much more comfortable.

[poulpaya]

The only other drawback is that the sensor underneath the viewfinder on the T2i won't work when I have my eye cup installed.
Result is that the LCD display stays on when you take pictures.

[motleypixel]

Interesting poulpaya, seems it would actually keep the LCD off more than on.  Good point though.

[poulpaya]

I thought the same thing too, but I guess it needs something like warm skin to activate the sensor.  I have no idea.  I thought it was just light sensitive.

[motleypixel]

I think it's just a proximity sensor...kind of like the ones on automatic toilets.