Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Can this lens be used for Canon EOS 500D? Is this lens AF (Auto Focus)?
Document: Great lens. Easy to use. Doesn't distort to much and gives great color! Also very crisp with a decent auto focus.
I bought this lens after reading all the reviews and not wanting to pay the full price for a Canon lens. I am in Real Estate so getting close to photograph the outside of a property and getting a pan photo of each room in a house is very important. I think the lens quality is good. I am using this lens on a Canon Rebel T3. The one issue I have is that the lens is larger/bulkier at the front end than the 18-55 lens that came with the Camera.
Great choice of wide angle lens! I got this for my husband's birthday present, since he's been longing to have a wide angle lens for his canon camera but canon wide angle lens is way too much for our budget. I've searched and searched for the right lens with not so much pricey, read all the reviews that I can get... until I've seen Dom Bower's review about this lens in You Tube and decided to purchase this lens. I was so excited when I received it. Great packaging!
I was heading on vacation to Sedona, AZ and wanted the wide angle lens for the trip. Unbelieveable - incredible photos I will cherish forever!! !
More distortion on the side that I had expected but the lens is great and the pictures are awesome. Video wise it does a great job too! The packaging is really good and the 3 filter are really good plus, especially to protect the lens. Really happy so far!
I've been very pleased with my Sigma Wide Angle Lens. It has done everything I hoped it would. I've taken photos of sunsets and fall colors. All photos have been clear and very sharp. The service at Amazon was excellent. My lens arrived on time and in perfect condition. I am very happy with both the lens and with Amazon.
What a great price for this lens - able to get up close to a wide format scene and get everything in the photo. Be careful to hold the lens level to avoid the "fish eye" effect on the edges of your photo. Not good for photos taken at a distance. The lens comes packaged very nicely with a lens hood and cap. Overall a great value.
This Sigma 10-20mm is no doubt a masterpiece of design!I was highly impressed that I almost can't find ANY chromatic aberration such as fingerings in high-contrast areas all over the frame (it's really difficult to get it, but not impossible)It's fantastically sharp. (And it's quite heavy)Distortion is just as expected in any ultra wide-angle lens.It has become my favorite lens! My main goal is shooting northern lights and heavenly phenomena, so I'm looking forward to the winter!
I trashed this lens in my earlier review but now I openly admit  I was wrong. (which will please numerous others who were so vitriolic about me & got personal- how sad!). The lens was showing an error message & I ate humble pie when sigma repaired it FOC even though they discovered a single grain of sand inside it. Wow- delicate pieces of kit!The lens worked well until the error message  issue & now it's repaired I can honestly say its worth buying. Sorry Sigma.
This means I have to shoot indoors without the flash, add a flash unit on the hot shoe or use another light source to illuminate the room.
Answer: I use this lens on my canon 60D no worries and yes there is AF.