Lens Nikon D3100 doesn't twist all the way back?

So, I have a Nikon D3100, I have had the lens for a while now (standard one) and it's supposed to go from 55 to 18, but somehow I can only twist it to 35 and not any further back
Does anyone have any clue how to fix this? Is there like a screw or anything?

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Im looking for an accessory for my nikon d3200 but i don't know what its called?

Is there something like a screen you can plug into the side of your nikon so you can see yourself recording? If that makes sense.

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Nikon 70-300mm lens?

I am wondering some good uses for a 70-300mm lens for a nikon d700 if you have one what do you use it for I am just making sure that if I get it that it will suit my needs. Thanks:)

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Upgrade from Nikon D5200 to D4s?

My friend is going into professional animal photography and I told her that is too big of a jump because the D4s is so big and complicated.

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Canon EOS 40D, or Nikon D70 - for night (low light), medium shots & close-ups?

Canon EOS 40D, or Nikon D70 - for night (low light), medium shots & close-ups?

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Will the 55-200mm Promaster AF EDO LD lens fit my Nikon D3200?

Just wanted to make sure before I purchase.

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How to add black focus points to my Nikon D3200?

I just purchased a refurbished Nikon D3200 dslr and the stock Nikkor AF-S 18-55mm VR lens. I'm having problems though with the fact that I'm supposed to "see" black focal points in the viewfinder and I'm supposed to select those in order to tell the camera what to focus on. Is there a setting that I'm not seeing, in order to add those? I'm able to see the focus moving by looking at the lcd screen, as the dot moves, but it would be much more practical to have those black focal points that light up on the viewfinder. Thanks for any help!

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Which is better, a high end Canon camera or a HE Nikon?

Which is better, a high end Canon camera or a HE Nikon?

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Nikon 24-70mm f/2.8 vs Tamron 24-70mm f/2.8?

Which would you choose for a Nikon FX body such as D700 or D800

Nikon 24-70mm f/2.8 FX AF-S G ED
or
Tamron 24-70mm f/2.8 VC USD Lens

Some professionals advocate the Tamron. Budget seems to dictate Tamron and DXO also seems to favour the Tamron but which IN YOUR OPINION is actually the more preferable lens?

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HOW TO RESTORE NIKON D3100 FACTORY SETTINGS?

I have a nikon d3100 I want to restore the default settings but I couldn't + they told my to press two green button but I didn't found them in my camera I need help please

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