Are there lenses to help the nikon d800 with low lighting?

I'm trying to decide if i want to get the canon 5d mark iii or the nikon d800.i know that the 5d is more versatile (being better with low lighting and aliasing) but the d800 has an overall better resolution (therefor better images). also the footage of the d800 doesn't have to have a lot of post op work on it (5d needs it every time if you want your footage to look its best).so I'm partial to the d800, but are there lenses that can help with its low lighting or aliasing problems?
>>> Are there lenses to help the nikon d800 with low lighting?

Nikon 300mm f4 AF-S vs Sigma 150-500 HSM OS APO?

Which one will better purchase ?
>>> Nikon 300mm f4 AF-S vs Sigma 150-500 HSM OS APO?

AI-S Lenses on the Nikon D3100?

Is it possible to mount and use AI-S mount lenses on the Nikon D3100? I understand that it will not be able to auto-focus or meter. I want to buy the Rokinon MC 28-80mm f/3.5 to 4.5 and the Sirius Auto Zoom 70-210 f/4-5.6. I have read that all AI-S lenses can be mounted on the D3100 however on the 28-80mm's webpage it states that this lens cannot work on the D3100. Can I use these 2 lenses on the D3100?
>>> AI-S Lenses on the Nikon D3100?

Will a Nikon SB-700 flash work on a Canon Body?

I can either buy a ~$200 mounted flash or use my friend's, only problem is she shoots nikon and I shoot canon.
>>> Will a Nikon SB-700 flash work on a Canon Body?

Taking football pictures with a Nikon D3000 at night?

I have a Nikon D3000 with a Tamron 70-200 f/2/8 lens that I use for sports, I am relatively new at it only have been taking sports pictures for a couple of years. I want to know what would be the best setting to use for night football games. This is little league and I am still working on getting permission to be back down on the sidelines again this year. I did most of their baseball games over the summer but they only have a few under the lights and only one with my new lens (the others I used my kit lens) I had a hard time because I felt like to got the setting right then he would move a few feet one way or the other and it would be messed up again. The reason I ask is one of them will have more games under the lights this year, last year all his games were during the day. Oh and about half way through the season I started shooting in Manual so that is all I shoot in now. Thank you for your suggestions.
>>> Taking football pictures with a Nikon D3000 at night?

How to fix my photos?

I accidentally uploaded picture onto my laptop from my nikon as. NEF files instead of. JPG files… I changed one back to a. JPG but it is really small.is there any way to change them back to.jpg without all of them shrinking? thanks!
>>> How to fix my photos?

Nikon d600/ Canon 70d & 7d mark ii?

The Nikon IS real, but are the Canon dslrs actually coming out or are these just what people want, cause they're all over "canonrumors.com". And of so, when are they coming out? Canon has released the Pro 1dx and the 5d mark iii. For the entry level they have the (t4i/650d). When are the new midranged cameras coming out? People were saying August of 2011 to be announced but it's now August of 2012 and still no announcements! I'm looking to get a entry level full frame like the d600 and supposably the 7d mark ii.
>>> Nikon d600/ Canon 70d & 7d mark ii?

Anyone ever bought from Lensa Grafita before?

Okay, so I looked on here before posting this for similar questions and there was only one. I'm wanting a Nikon D5100 SLR and the cheapest place I could find one was Lensa Grafita -I don't have a lot of money at all and this is the camera I have been looking for for a long time now to get one cheap- It says that this camera is on sale, with the lens and other accessories. The only thing that makes me wary is the fact that they only accept bank transfers… Never done that before, -always use Paypal- I would like to know if anyone has used them before and if they can be trusted or any other advice given would be nice.

I don't want any 'avoid!!!'s' okkay? I would like proper advice!
>>> Anyone ever bought from Lensa Grafita before?

DLSR Backpack for climbing half dome?

I am going to be climbing Half Dome in Yosemite in the Spring and I am looking for a good DSLR backpack. I will be carrying my Nikon D90 with the 18-105 mm kit lens, an extra 55-300 mm lens, and an extra battery. I will also need room to carry a little food (my husband can carry most of that) water, and a light rain coat just in case. I was thinking something with a laptop section would work and I could slip in a hydration pack ( i'll make sure to take waterproofing precautions). I was looking at the Tamrac Adventure 9 online. I am 5'2 and 120 lbs though I was wondering if that pack would be too big for me to climb half dome with for my first time. Anyone out there with that bag? Or any other suggestions?
>>> DLSR Backpack for climbing half dome?

Does the nikon d90 have an electronic shutter?

I am looking to purchase a dslr and am set on the d90 just can't find any information wether it has an electronic shutter or not, thank you
>>> Does the nikon d90 have an electronic shutter?