Nikon D5100 Shutter Stall?

I was taking some night photos today with my camera mode on no flash and manual focus. My lens seems as though it is stalling. Is this normal? I have this camera since June and its lens has been like this since day 1.Is my camera defected?

Added (1). I have 18-55 mm lens

How much is the Nikon D7000?

I looked all over the website. I tried google and chacha. This is my last resort. Maybe I'm stupid, whatever. But does anyone know the price for the Nikon D7000?

Any places in Chicago where you can rent camera's?

I have my first major shoot this Saturday and I own a Nikon P90 but I feel it is not very appropriate for an event like this and it won't give me the most successful pictures I want. I tried rent a center but they don't have cameras of any sort. I would preferably want a camera like a nikon d50 or a d3000 or Canon. I would really appreciate your help.

Why does my aperture's ability to go lower change?

I'm a new owner of the Nikon D90 (first DSLR as well) and though I have many questions this is one I can't figure out. Some days I'll be able to set my apertures settings as low as F3.5 and others it only goes to F5. Why is this?

Is this Lens good for D3100?

Nikon Nikkor 55-200mm Zoom Lens features VR Image Stabilization, f/4-5.6G, IF-ED, AF-S, DX

Is this lens compatible for the Nikon D3100?

pros cons for this camera?

Exposure compensation, explanation please?

I use Nikon D5100. I shoot 2 photos in shutter priority mode. First photo is at +1 EV 1/30 sec.f/5 ISO 1000. Second photo still at 1/30 sec.f/5 ISO 1000 and now +3 EV. But there's no difference when I compared it. They look the same, no change at all. Why? I'm confused. I'm new to DSLR.

Nikkor f/1.8G - is it a good lens?

I use a Nikon D40.

I want to buy a lens that can make my pictures bright, with sharp objects good bokeh and so on. I found out about Nikkor f/1.8G and became very interested in it. I've heard it's a very good Lens. I just wonder if anyone has used this lense and if it was good? Is it worth to buy a 1.4G, or is 1.8G enough? Is there a big difference?
Also, does the D40 has a built in APS?

Suggest me a Digital SLR under RS.30000?

Hi I'm very passionate about photography and I want to buy a DSLR in Rs.30000 INR price range. I heard about 'Nikon d3100' but still I want to know whether I was right to choose this or I have to choose another one. Please suggest me a good DSLR in my budget specified above. I will be very thankful for your answers. Thank you in advance.

Added (1). I mean 30000 rupees…

Best Sports Photography Lens?

I have a Nikon D3100

i want a good low light lens (as in when i zoom in all the way) lens.preferably a 55-200mm
with VR/AF and Manuel Focus (if possible)

i want to shoot, baseball, soccer, football and soccer games.

All the games will have enough light ( sun, artificial light)

I prefer A nikon lens, but Canon will do

i have around 200 or so dollars

Why does the Nikon d7000 have a 0.94x magnification?

So I've been comparing the viewfinders of Nikon d7000 and Eos 7d, which happens to have the same 100% coverage and the same viewfinder size of 0.63x according to DPReview. But, the Eos 7d has a 1x magnification compared to d7000's 0.94x. If it has the same coverage and size, why does the magnification differ?

Added (1). What does you mean by increasing or decreasing image?