Is Tamron A17 and Tamron A17NII are same Lenses for Nikon DSLRs?

I want to buy a 70-300 tellifocal lens for my Nikon D40X DSLR and I'm confused in these 2 lenses!
Are they Same or Different?
Nikon Original lenses are expensive so suggest me other lenses of same focal length except of Nikon!

Taking multiple photos with different lighting/effects on a Nikon D3100?

I'm in a photography class in high school, and I constantly see advanced photo students taking duplicate photos with different filters within the camera.

I use a Nikon D3100, and I understand the parts of the camera and use manual mode, but don't necessarily understand every single feature it holds.

I want to know if there's a way I can take two identical photos, black and white and color, at once, within the camera.

I searched through the features in my camera camera, and tried checking out my manual about this, but I just don't know how to properly word it, or where to find it.

Any advice?

DSLR photo development?

Where is the best place to develop clear/sellable photos from a digital SLR camera (Nikon D5100)

How big of a photo can I develop with a Nikon D5100?

I have a Nikon D5100. How big of pictures can be developed with the picture still being clear and high res.

Best compact camera I can get for under $300?

I'm looking to sell my Nikon D5000 and get a compact camera, can someone recommend the nicest one I can purchase for under $300, I travel a lot and take pictures of landscapes and portraits… Looking for very high resolution and color.

Video noise even at low ISOs?

I'm new to dslr film making.

I have the Nikon d7000, and the kit lens 18-105 mm.

Even when I film at iso 160, the video is VERY noisy.

There's noise on the whole image, particularly the shadows. I have no idea what is wrong, I have tried various different combinations of ISO/ shutter speed/ aperture and I get the same results.

I'm filming in 1080p, 24 frames per second.

I have included an example of video at ISO 320, aperture f 3.5 and shutter speed 50. This is around the least noisy footage I can get and there's noise in the shadows, particularly under the desk in the example. Please help, how do I over come this noise? Is it a case of in camera settings or merely just the light in the scene? I'm also using an IR filter (HOYA HMC uv 67mm), but its hardly relevant.

Please help me over come this noise, and any good sources for introductions to dslr film making are greatly appreciated.

Nikon D3200 White balance?

So I'm a complete beginner with DSLR cameras and wanted to try time-lapse photography. I have a Nikon D3200 and wanted to try some simple time-lapse of clouds to start out. I know the auto focus should be off, and use manual mode. I'm somewhat familiar with the manual settings (iso, shutter speed, ext) and the 24-30 fps for smooth time lapses.

My main question is how to turn off the auto white balance? If i set the camera to manual mode does that automatically lock the white balance? There doesn't seem to be an "off" setting for white balance it just lets you choose between different scene modes (clouds, incandescent, ext.)

Also any good tips for shooting cloud time-lapse or any other scenes?

18-35mm lens for my Nikon D80?

I wanted a lens in the range of a few hunred (maybe 400/500), can i get a nikkor lens (or one that fits on my nikon) with a focal range of 18-35mm, with autofoucs preferably.

Any make, as long as it fits on the D80. Just a list with prices please.

I'm right in thinking that a smaller zoom results in less problems with distortion/sharpness etc? Which is wy i'm avoiding an 18-55mm. I'm still new to lenses…

I'm using an e series 35mm at this moment.

Best Point & Shoot for Quality Photos?

I'm a blogger and I normally shoot with my Nikon D5000. I have found that sometimes carrying around a big dSLR/camera bag, etc can be a hassle depending on what is going on that day. I'm looking for a smaller (not necessarily point and shoot) camera that I can fit in my purse and travel with ease without compromising quality.
I got my dSLR in 2010, and it's been just as long since I've taken any photo classes, so I'm out of loop as far as what's new and a good buy.

Any recommendations? I've been looking around at the Canon Powershot, possibly the SX50, or the Nikon 1 cameras.

Will this HDR trick work? Can somebody confirm?

I have a Nikon D3100 which does not have automatic bracketing exposure feature. So I decided to take 3 shots of a scene with low, mid & high exposure modes and then combine it for HDR effect. Though I used my tripod, there were slight variations in all the 3 pics because of having to change the shutter speed for different exposures.
Now, I have a random thought of taking just one pic and then edit it in light-room to produce 3 different pictures of different exposures and then finally combine them for HDR effect.Is this a good idea? Has someone tried this?