Nikon D3500 User Manual page 15

Insert the Battery and a Memory Card
Attach a Lens
A
Removing Lenses
To remove the lens, turn the camera off and press and hold the lens-release
button on the front of the camera while rotating the lens in the direction
opposite that shown above.
Mounting mark (camera)
Mounting mark (lens)
Rotate the lens as shown until
it clicks into place.
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