
Need Circular Polarizing Filter-what size fits?
Have a Nikon D90 DSLR that came with an 18-200 lens, a Tamron 10-24mm wide angle and Tamron 70-300 telephoto. Do I need filters for all three and how do I know what size filter to buy? Am told B&W is best but are Hoya filters any good? I use the wide angle for my landscape photography so this is the main one I would use the polarizing filter for.Am fairly new to photography so I appreciate the advice.

Recently, I bought a Nikon D3100 starter kit, that came with a camera bag made by Nikon. The camera, the link of which is provided below, is not as spacious as I would have liked. In my camera bag, I carry with me:
-Nikon D3100 Camera Body and neck strap
-18mm-55mm lens
-55mm-300mm lens
-Lens hood for the telephoto lens
-4 memory cards in a memory card wallet (except one, which is in the camera)
-2 batteries (one in the camera)
-Battery charger
-Press pass (I'm on the school newspaper)
-2 UV filters
-View finder cover
-Pen and medium-large notepad
-Cleaning supplies
I believe that that is everything I carry with me in my camera bag. Can you please recommend a better spacious camera bag that will hold everything in there comfortably? I don't want it to be too bulky, but if it is, I won't mind a bunch. Thanks so much!
Current camera bag:
http://www.amazon.com/...002Z8LDXI/

I heard that you can make simple hdr photos on the Nikon D90 itself by using the multiple exposures setting. How do you use it? I have it on, and have taken some photos at different exposures while bracketing and not bracketing, but I haven't found a way to put them together. There's one video on youtube that shows how, but it's showing the camera doing it automatically after the final image. Mine isn't doing it automatically and I can't find a way to merge them while still in the camera. Any help would be appreciated.
Video I found:
Added (1). I know it's not a true HDR, but it's giving an effect that I'm looking for. All I want to know is how to merge the layers while it's still on the camera.

I recently reset the settings on my D90, but now everything is turning out very noisy, even on auto. I tried lowering the ISO, playing with f-stop and shutter speed, but nothing is helping. I must have undone some kind of setting I had it on when I reset the camera. Any ideas on what I can do to get it back?

Does the Nikon 50mm f1.8G AF-S Nikkor lens work well with a Nikon D3000?
I was looking into buying it for my D3000, but I just wanted to know what people thought of it with the Nikon D3000.

Which fisheye lense is better?
Don't say they both stink.
1.http://www.amazon.com/Zeikos-ZE-1858F-definition-attachment-Warranty/dp/B001XW67LU/
2.http://www.amazon.com/Zeikos-ZE-3437F-definition-attachment-Warranty/dp/B00275G10E/
or
3.http://www.amazon.com/Zeikos-ZE-3252F-definition-Fisheye-Warranty/dp/B00275G104/
please say why. And are they compatible with a nikon d5000?

What kind of DSLR do you need to take photos for National Geographic?
What are the lowest end cameras from Nikon and Canon that can take good magazine-quality photos? What are the ideal cameras? How would the Nikon D5100 do?

How to livestream/webcam with a Nikon d5000?
I connected my Nikon to my computer with the USB device and turned it on but it won't show up on my computer screen itself. I want to be able to film and see what I'm filming on my laptop.

I own a Nikon D3100.It used to be fine at recording and would record video for a number of minutes. I have an SDHC Class 10 card in it and it is no where near full. My son started walking today and I NEED to tape it so my husband can see but the camera will only record for about 6 seconds and then says "video recording interrupted".

Best cheapest all purpose lens for Nikon D5100 and nikon D3100?
Best cheapest all purpose lens for Nikon D5100 and nikon D3100?