Opteka Remote Release Cord for Canon EOS 5D 10D 20D 30D, 40D & 50D Digital Cameras --

Have used it to trigger my Canon 40D on my telescope and it worked just fine.

No surprise, working as expected. A little bit longer would have been better - I'll cut it and extend it myself one of these days.

Waste of my time, I just got this item and hooked it up to my Canon EOS 30D. The button focuses, but does not shoot. I pressed down really hard and nothing happened.

It is designed to hold the button down when using the BULB shutter (long exposures) but it's all useless if your can't fire the shutter!

This is going back to where it came from!

I had my camera equipment stolen and read the reviews on the less expensive Opteka cable release and decided to save a few bucks on the replacement. I have now had 2 and they both have failed within the 1st ten shots. Extremely frustrating when you're in the field and cant't get the shots you have meticulously set up for the right moment. I am going back to the Canon version which worked perfectly for years. Remember, you get what you pay for.

This device is not particularly nice, and it does not work well. It feels cheap in your hand, and the switch does not have a positive "click" letting you know that you have pressed the button. Also, it worked fine when it was new, and now almost does not work at all. I'd say I get a shutter exposure perhaps 1 of every 10 times I press the button.

Do yourself a favor and spend an extra $20 for a better alternative. You can go without 3 trips to starbucks to offset the cost.