I have a camera Nikon 750d and when I take pictures with it in the night it changes the lights as it would be day, how can i change it?

I have a camera Nikon 750d and when I take pictures with it in the night it changes the lights as it would be day, how can i change it?

Set it to manual exposure and try several pics at each setting until you get the results you want. Your camera on automatic tries to get a full exposure with whatever light is available by opening the aperture wider and increasing the exposure time.

Put camera in manual mode. Get a tripod or hold camera securely against something.
Read this article and similar ones.

Simple answer is that you have overexposed the scene and need to decrease the size of the aperture and/or use a faster shutter speed. Or if you want to use a specific aperture/shutter speed combination for either technical or artistic reasons, you can either decrease the ISO, or use an neutral density filter if you're already at your camera's lowest ISO setting.

There are tools inside the camera that will help you to set the exposure correctly before taking a shot. The exposure scale is one such tool that will help.

On the LCD screen and inside the viewfinder of your D750, you will see an exposure scale that looks something like this: -3,-2,-1,0,1,2,3 Somewhere along this scale will be a free-flowing dot that moves left to right. To make things easier to understand, it helps if the camera is in spot metering mode. This way you know exactly what spot the camera is metering.

Let's say you're in manual mode and you've set the aperture and shutter speed based on what the camera indicated when in program mode. So when in program mode, the camera said 30" @ f/8. Now when you transfer these numbers in manual mode, you will see that the dot moves left to right. What the dot is telling you is how dark (negative numbers) or how bright (positive numbers) that specific spot is going to be rendered. The "0" mark is middle gray. Using the scale, you can now see how bright or how dark any specific area will be rendered. You can now increase/decrease your shutter speed or aperture and the dot will move left or right. This is the best way to determine how dark or bright any specific area will be rendered in the shot.

Of course, you could also just take a picture, look at the image on the back of the camera and then use exposure compensation to darken or lighten the image to your taste. In your case, using an exposure compensation of -1 or -2 would probably be enough.

A third way of getting a better exposure is to use exposure bracketing. This is where you tell the camera to take some number of shots (usually 3 or 5) each at different exposures (usually 1 stop between each shot). So, for example, you can set the camera up to take 3 shots at 2-stop intervals. This means that it will take one image at indicated exposure, one where the exposure is increased by 2 stops and another with the exposure decreased by 2 stops. It's just automatic way of using exposure compensation. Most advanced shooters and instructors will think that this is the lazy way of taking pictures because it doesn't for the photographer to think about what they're doing.

The camera, in auto, seeks an exposure to give you the most detail and range. Use Manual mode to adjust the exposure to keep it looking night. A tripod is always useful.

READ YOUR CAMERA'S INSTRUCTIONS MANUAL… That's where you'll find out about the features, functions and options the camera brings and offers you for best results. You have a magnificent camera… But you lack knowledge of the basic fundamentals of photography. Why don't you sign up for a Beginner's Photography class and learn how to overcome difficult lighting situations, use of light and shadows, use of the camera's light meter, use of the different metering modes, use of the different features and functions of a DSLR, etc, and avoid all the discouraging, frustrating grief and hassles that come from lack of knowledge and inexperience?

So, someone here tells you how to take those night shots and you quickly mimic the instructions… But you won't understand why or when to use those instructions; hence, you'll have learned nothing intellectually. You're stifling your creativity, and that's not what photography is about.

Why do your night photos come out light? Your camera seeks a middle-tone gray. Read your camera's instructions manual and take a Beginner's Photography class and you'll understand how cameras seek a middle gray tone (or read library books and find out). You'll also learn how to operate your camera on Manual Mode, and when and why the use of a tripod. Good luck, best wishes and have fun.

EDITED: I won't leave you hanging; go to the following URL and see the different videos that will hopefully show you and explain how to take better night photos

All of your answers are in the manual.

You probably mean that the night-time pics look too bright. Set the exposure compensation to "minus 2" or "minus 3" and see how it goes. Don't use flash if you want good atmospheric night shots.