Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: auto focus? Can you auto focus with this remote controller?
Document: The remote control is easy to use and works with my Digital Rebel XTi (same as 400D sold in Europe). Just set camera to "Self-timer / Remote control" (second button from the top on the right side of the display). The shutter can than be remote controlled. Of course the auto focus works also when using the remote control!
This product has proved to be the most fun for my grandchildren, they love being able to click the button and all of us be in the photo. Just put the camera on auto focus, gather around the table or whatever, and just snap away. This also gives you the ability to take those family photos in front of the Christmas Tree, etc, when it's just you and yours at home
I have also managed to get shots at 90 degrees from the camera and slightly ahead of the body.Full moon, fireworks, and any other dark shot is a breeze with this.For fixed distance shots, I recommend using the auto focus and then switching the lens to manual.Play with the ISO settings as well.
This device should be standard with all digital slr's. The versatility it adds goes far beyond including yourself in group shots, I was at the Kentucky derby this weekend and I wanted pics of the enormous crowd, so I mounted my camera on a mono pod without extending it I held it up high above my head as if it was a scepter or the Olympic torch and used my rc1 to trip the shutter. the shots are amazing.One reviewer comments that it doesn't auto focus that is not true!
I purchased this remote control in order to take pictures of a group people, including myself. Now there is no missing one in a picture of a group of picture! It is extremely easy to use the controller, too. Just set the camera by clicking a button, then press the control when we are ready. "Snap"... All done, a group picture including myself.
I enjoy using the Canon Wireless Remote Control RC1. The only drawback is that it is a line-of-sight controller and it needs to be in front of the camera to operate properly. The Canon radio control remote is more handy and can operate from behind the camera and for greater distances... but the radio control remote cost more.
I just got my RC-1 Remote Controller, and wow. It was so easy to use and worked without fail (just take it out of the box and turn it on). It does what I need it to do. The only thing I did not care for was that you have to make sure that the remote is pointed at the camera or at the side of the camera, you cannot stand behind the camera to take pictures.
I've had this remote for two years and it's already stopped working. But hey, what can I expect from an electronic controller that's under $20.00.It did work but is not very versatile. Too many times I found myself in a picture with my hand exposed and the remote visible. Also, the range is terrible, about 12' with new batteries.I'm upgrading to a more expensive version, something I should have done from the beginning.
Before discovering this product I read so many negative Amazon reviews about the $50 shutter release which attaches to the camera via a short cord that I nearly gave up. This product, however, is less expensive and completely wireless. Since Canon is nice enough to include batteries with the product, I was able to utilize the remote controller immediately. What a great product! It works perfectly with my Canon Rebel Xti. Now I can be in our photos, too!
Works great indoors. Outdoors worked well most of the time. I'm very satisfied. Certainly better the regular auto timer.
Answer: Yes, it will autofocus as long as the camera lens is set to auto.