What size UV filter do I need to buy for my Nikkor lenses?

I'm in process of buying two lenses,
- Nikon 24-120mm f/4G ED VR AF-S NIKKOR Lens
- Nikon 50mm f/1.8G AF-S NIKKOR FX Lens

I've searched the web and almost everyone recommended to get a 77mm UV filter a general one so I can use a step-up rings when it's to be used with other lenses.

So the question is, is this a good choice to get this one (I'm going to get a B+W one), and do I need step-up rings if I bought this one in order to use them with the above mentioned lenses?

How much is my Nikon N80 film camera worth with a Nikon AF Nikkor 28-80mm lense?

I might want to sell it but I don't know what it would be worth for sure. I works great and in great condition.

I'm having diffuculty to decide which one to buy. A 32 inch LED TV, or a 35mm prime lens?

I'm planning to buy a nikkor 35mm 1.8G prime lens in addition to my arsenal. While I'm at the mall, I saw this Devant 32inch LED TV. Now I'm starting to decide which one to buy with the budget I have. Please help justify.

Added (1). My first priority actually was the prime lens since I'm into photography. But I also realized I need a TV as well.since I don't have a TV in my room. I only use my desktop computer to watch movies and episodes. What really got me in considering the Devant LED TV is they are on sale!

How to take a nice picture of a moon using NikonD3100?

I just bought Tamron 70-300 VC for Nikon 3100. Curious how people take a nice shot of a moon. When I do it, it look like a white spot. What am I doing wrong?

Will this lens work with a Nikon FG?

I purchased a Nikon FG body for a film class I'm in.
I'm looking for a lens & was wondering if this will work fine with it:

http://www.ebay.com/...0784512625

(Nikon 50mm f/1.8D AF Nikkor Lens)

or else:

http://www.ebay.com/...1284175973

(Nikon Nikkor 50mm 1:1.4 Manual Focus AI mount_

if both will work, which would be best out of the 2?

How is the tamron af-70-300mm macro lens for nikon 5100/5200?

I have plans to go for either nikond 5200/5100. Does this lens support my camera? I can afford aroumd this much for lens.

Nikkor 40mm micro vs 18-55 mm?

I currently have the 18-55 nikkor lens and was rhinking of purchasing a 40 mm macro lens for macro pics, is it worth it considering I can still get close with my current lens?

What lenses have Nikon F mount on backside?

I know that all Nikkor lenses have F mount and can be mounted to Nikon body without modifying but i'm interested in other lenses that has beed produced with F mount on backside even they are not Nikkor?

Where can I find a rear lens cap for my Nikkor 18-200mm?

Since I now have a second lens that I plan on using a lot, my 18-200mm won't be on my camera 24/7 like it currently is. I only have a cap to protect the front of it, I don't have one to protect the back. My new lens, the 50 1/8, comes with a cap for both front and back. My 18-200 didn't come with a rear cap.
I googled "Nikon 18-200mm Rear Lens Cap" and I keep seeing stuff about rear lens caps LF-1, 2, 3, and 4 and none of it makes any sense to me. How do I know which is the right one?

Is there a best aperture to shoot with on each lens?

For each lens is there a specific aperture that produces the best image quality? Why?

How do you find the best aperture and what would it be on my Nikkor 18-200mm 3.5-5.6?