Image Quality And Size; Image Quality - Nikon D3400 Reference Manual

Image Quality and Size

Together, image quality and size determine how much space
each photograph occupies on the memory card. Larger, higher
quality images can be printed at larger sizes but also require
more memory, meaning that fewer such images can be stored
on the memory card (0 323).

Image Quality

Choose a file format and compression ratio (image quality).
Option
NEF (RAW) +
JPEG fine
NEF (RAW)
JPEG fine
JPEG normal
JPEG basic
A
NEF (RAW) + JPEG
When photographs taken at NEF (RAW) + JPEG fine are viewed on the
camera, only the JPEG image will be displayed. When photographs
taken at these settings are deleted, both NEF and JPEG images will be
deleted.
84 More on Photography
File type
Two images are recorded: one NEF (RAW)
NEF/JPEG
image and one fine-quality JPEG image.
Raw data from the image sensor are saved
directly to the memory card. Settings such as
NEF
white balance and contrast can be adjusted
after shooting.
Record JPEG images at a compression ratio of
roughly 1 : 4 (fine quality).
Record JPEG images at a compression ratio of
JPEG
roughly 1 : 8 (normal quality).
Record JPEG images at a compression ratio of
roughly 1 : 16 (basic quality).
Description