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: Does the Canon G15 come with a Canon USA Warranty
Document: My G15 is an upgrade from the G9. Both are excellent cameras and the improvements of the G15 are sufficient to justify buying it. However, both my G9 and my G15 have gone to Canon service. The G9--out of warranty--just quit working while I was on a trip. The G15, less than a year old, has the problem with the lens extending only part way.
To be really safe, you need to wait for the preview to come up and look at it carefully. Needless to say these problems are a disaster if you are taking any sort of action scene. I've never had this sort of problem with any other digital camera.Canon PowerShot G15 12MP Digital Camera with 3-Inch LCD (Black)
I purchased a used Canon Powershot G15. It came with an off brand charger and the battery lasts only a day. I assumed that it would come with original charger and expected that the battery would be better. The company did agree to take it back. But I thought it should have been described more accurately so you knew what you were getting.
The Canon G15 takes great pictures. However, there were a few minor negatives I've discovered. I was disappointed to find out after its purchase that it neither has a "bulb" mode nor does the package come with a USB transfer cable. The USB transfer cable is necessary to upgrade the firmware (no update available at this time), required to install the software via the provided CD's installation application, and eliminates having to remove the SD card from the camera to transfer your photos.
We received this camera and it worked well for about 3 months and then stopped working. When we returned it to Canon, they said that it had extensive corrosion inside and refused to honor the warranty (of course, I have no way to verify this, so I just have to take their word that they don't want to pay for a warranty repair).
The manual warns the user that wind or rain can cause the lens to stick. This is not a waterproof camera, but the idea that you must avoid using it on a windy or rainy day (obviously the camera should be protected from rain), suggests that this is a camera best suited for use indoors or on a sunny day. The repair was over $220. Canon said the warranty did not apply as they found water inside the camera. There was no proof that this was the case.
Bought this camera back in December. Great until it stopped working six months later, and the worst part being that Canon customer service refused to repair, claiming it was water damaged despite the fact that this camera never was near a drop of water. Rude service staff, too. Avoid at all costs. 200 bucks to repair a 400 dollar camera that's still under warranty? I think not.
My old G7 is tight with no movement.My opinion is that it is a lack of quality control somewhere in Canon's manufacturing process. Therefore any replacement could have the same defect or it could develop a year or two later after it is out of warranty. I returned the G15 and am looking for a substitute brand.I would not buy this camera and I would not recommend it to anyone.Update July 2014After buying the Sony RX 100 I decided to try to get my old broken G7 fixed.
Right now I'm caught between Canon and Amazon which is wasting my time and leaving me without a camera right before Christmas. I will revisit this review if any semblance of customer service comes through. Buyer beware.Update: While Canon held fast on their not honoring the warranty, Amazon made us whole within hours of my contacting customer service. I was thoroughly impressed with the speed and effectiveness of their response and we will have a camera for Christmas. So, Amazon Customer Service:  5 Stars.
Shot two remote external flash (580ExII and YN560) and measure the aperture, set both the 7D and the G15 to that aperture and ISO and shoot the colorchecker grey card. They both come out the same and ok (proper value, no cast).- Flash control - **** There I tried with the one I had: an old 580ExII.
Answer: Yes. It comes with a limited warranty covering the device for a year upon date of purchase.