Why is Nikon video poorer in quality than Canon?

I was recently helping a guy get some better camera angles at a live performance in a record store, and I have a Nikon d5100 and he has a Canon crop-sensor camera, but I can't remember what it was called. There was not a lot of light available. He had an 85mm 2.0 and I had a 35mm 1, 8. We both shot at 30fps 1080p and similar exposure.

But his video looked almost perfectly clean while mine had noticeable noise. I don't know if he's going to be able to use it. Why is this the case for video? According to DXOmark, the Nikon d5100 has the best low light ISO capability of any APS-C camera except 1 Pentax one and most of the Canon ones are much less capable, so it must be exclusively a video thing.
>>> Why is Nikon video poorer in quality than Canon?

50mm f1.8 AF lens compatible with autofocusing on Nikon 5100?

Hi I was wondering if the Nikon 50mm f 1.8 AF lens will auto focus on the Nikon 5100. I saw on a review that you had to manually focus, but on a different one it said it would autofocus. Just wanted to clarify! Thanks!
Added (1). Would this autofocus?
http://www.ebay.com/itm/Nikon-50mm-f-1-8D-AF-Nikkor-Lens-Gray-Market-2137-G-/320937470527?_trksid=p2045573.m2042&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D27%26meid%3D3838001058545767602%26pid%3D100033%26prg%3D1011%26rk%3D1%26sd%3D320937470527%26
Added (2). Oh gosh I just realized I forgot the d in d5100. Whoopsies ;)
>>> 50mm f1.8 AF lens compatible with autofocusing on Nikon 5100?

Is their anyway 2 get pictures onto your computer without a usb cable?

Is their anyway 2 get pictures onto your computer without a usb cable I was at one of my friends house and they took a picture with their camera and it uploaded 2 his computer and he didn't even plug it in or anything
Can I do this I have a Nikon cool pixs camera
>>> Is their anyway 2 get pictures onto your computer without a usb cable?

Can Sony break into the DSLR market?

Any opinions?

At some point, do you think Sony will become a viable competitor to Canon and Nikon? Since those two are the big ones.
>>> Can Sony break into the DSLR market?

Best photo locations for the Golden Gate?

I am coming to San Francisco in January and hope to take a bunch of photos of the Golden Gate Bridge.My question - where are some of the best locations to photograph the bridge? Even if they are a little off the beaten path - I am ok with that. I am from Illinois and love bridges. This may be my only opportunity to catch some photos of it. Also, any lens suggestions? I have a Nikon D5100 that I will be bringing with.

Thanks!
Nic
>>> Best photo locations for the Golden Gate?

Okay, I would like to know your opinion: Nikon or Canon? And why? Cant decide which.?

Also, please list any cameras that you find very good, just for photography that are Canon or Nikon. Thankyou!
>>> Okay, I would like to know your opinion: Nikon or Canon? And why? Cant decide which.?

Nikon 18-200 vr2 or tamron 10-20 and tamron 28-75?

I have a Nikon 18-200 vr2
I just bought a 70-200 vr and it it much better than the 18-200
I wanted to know from anyone who has the lenses,
Is it worth it to sell my 18-200 vr2 and buy a tamron 10-20 and a tamron 28-75.
The 28-75 is a 2.8 so it is better than the nikon 18-200, and the 10-20 has a -8mm wider angle than the nikon so it will be better for landscape and wide angle.
I cant afford the Nikon 12-24 and 24-70 lenses because they are almost $2000 each.
Thanks
>>> Nikon 18-200 vr2 or tamron 10-20 and tamron 28-75?

Camera videos lose audio when transferred to laptop?

I've taken some videos with my camera (a Nikon D3100). When I transferred them to my laptop (an Asus… something) and tried to play them, there was no audio. I tried opening in multiple programs, but it didn't make a difference. I've moved videos from the camera to the laptop before, and it was fine.

I tried a Google search for a solution, and got a few different Nikon- and photography-related forums and help pages. They all say to download an updated codec. I found a rather recently updated one (from September of this year) and attempted to download it. When it began to install, a notification popped up that said a newer codec was detected on my computer, so the installation stopped.

The videos are pretty big files, because they're kind of long. Would that have anything to do with it?

And I'm going to repeat a very important piece of info here: I already tried downloading a codec and it said it was up-to-date. I know someone's going to answer this and just say "Get a new codec." and think they're being incredibly helpful. That sort of thing happens every time I ask a question.

CODEC. UPDATED. ALREADY.

Anyway, thanks in advance. :)
>>> Camera videos lose audio when transferred to laptop?

Is refurbished dslr camera is good?

Im a starter to a photography.and i want to start in a small cheap but good quality dslr camera. 12mp 14mp where should i start nikon? canon? or either of them is good.please help.if refurbished is good.
>>> Is refurbished dslr camera is good?

Which 10x50 binocular to buy for Amateur star gazing / astronomy?

I am new to star gazing I have done some initial research for what binocular to buy. I am convinced that 10x50 porro prism binocular will do great fro me.
Now I am confused which binocular to buy.
I looked online, I found the following for consideration:
- Olympus 10x50 DPS I
- Nikon Action 10x50 CF
- Kenko Artos 10x50W

Olympus is costing 4.3K, Nikon 7.4K and Kenko for 8.7 K. I researched Olympus is having BAK7 prism that is why it is coming cheap.

My Budget is around 8, 000 Rs (roughly 150$).

I need some expert advice to which binocular to buy. If any other binocular is also good (and in my budget ;-) ), please tell me.

I am living in Pune, India.So please suggest something that is available in Pune (or can be delivered to Pune)
>>> Which 10x50 binocular to buy for Amateur star gazing / astronomy?