How to change my settings to default factory settings on m Nikon d3000?

I'm new with this camera so I was playing with the settings and I really ****** them up…

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The exposure compensation on my Nikon D3200 doesn't work?

The exposure compensation on my Nikon D3200 doesn't work? - 1

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Why isn't my Nikon D3200 display not changing in manual?

My camera recently had a circuit problem (and wouldn't turn on) and today I just got it back from being repaired. It works as good as new - except one thing: on live view, on manual, the screen doesn't preview exactly what the photo should turn out as. It automatically adjusts the preview as if it were on automatic, instead of showing what my settings are. It worked fine before it had the problem I mentioned.
Does anyone know what the matter is?

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Will a Nikon Metz Mecablitz 64 Af-1 wifi work with an olympus camera?

I have a metz mecablitz 64-af1 flash gun that can talk to my nikon camera via wireless and basically flash without the need for it to be ohysically attached to the camera.

I was wondering if, even though this flash is for nikon can insimply use manual mode 'wirelessly' with my olympus camera?

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Hi I have a nikon D5300 with the 18-55 and 35mm prime lens?

I wanted extend my reach of the camera little bit more… So should I go for

Nikon AF-S DX NIKKOR 55 - 200 mm VR II
                              OR
Or Nikon 18-105 or 18-140? is there a major image quality difference between these lenses?

Also so I spend more time on wider end let say 18-35 ; what other lense can I use in this area?
Third party lens will do too

Thanks again

I will list my desired lenses for complete set.

Wide angle lense
35mm Nikon prime
40mm or 50 mm nikon prime macro which ever is better?
55-200mm nikon vr |

Read more: Hi I have a nikon D5300 with the 18-55 and 35mm prime lens?