Nikon D3400 User Manual download pdf (Page 299)

275Technical Notes

A Use a Reliable Power Source

The shutter curtain is delicate and easily damaged.

If the camera

powers off while the mirror is raised, the curtain will close

automatically.

To prevent damage to the curtain, observe the

following precautions:

• Do not turn the camera off or remove or disconnect the power source

while the mirror is raised.

• If the battery runs low while the mirror is raised, a beep will sound

and the self-timer lamp will flash to warn that the shutter curtain will

close and the mirror will be lowered after about two minutes.

End

cleaning or inspection immediately.

D Foreign Matter on the Image Sensor

Foreign matter entering the camera when lenses or body caps are

removed or exchanged (or in rare circumstances lubricant or fine

particles from the camera itself ) may adhere to the image sensor,

where it may appear in photographs taken under certain conditions.

To protect the camera when no lens is in place, be sure to replace the

body cap provided with the camera, being careful to first remove all

dust and other foreign matter that may be adhering to the camera

mount, lens mount, and body cap. Avoid attaching the body cap or

exchanging lenses in dusty environments.

Should foreign matter find its way onto the image sensor, clean the

sensor manually (0 273) or have the sensor cleaned by authorized

Nikon service personnel. Photographs affected by the presence of

foreign matter on the sensor can be retouched using the clean image

options available in some imaging applications.

D Servicing the Camera and Accessories

The camera is a precision device and requires regular servicing.

Nikon

recommends that the camera be inspected by the original retailer or

Nikon-authorized service representative once every one to two years,

and that it be serviced once every three to five years (note that fees

apply to these services).

Frequent inspection and servicing are

particularly recommended if the camera is used professionally.

Any

accessories regularly used with the camera, such as lenses or optional

flash units, should be included when the camera is inspected or

serviced.

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Nikon D3400 User Manual Page 299

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