Canon EOS 250D Advanced User's Manual page 97

Cautions for <A> HDR Art Standard, <B> HDR Art Vivid, <C>
HDR Art Bold, and <D> HDR Art Embossed
Compared to other shooting modes, the image area will be smaller.
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The Live View image displayed with the filter applied will not look exactly the
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same as the actual captured image.
If you shoot a moving subject, the subject's movement may leave
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afterimages, or the surrounding area of the subject may become dark.
The image alignment may not function properly with repetitive patterns
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(lattice, stripes, etc.), flat or single-tone images, or images significantly
misaligned due to camera shake.
If you are handholding the camera, try to prevent camera shake when
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shooting.
The color gradation of the sky or white walls may not be reproduced correctly.
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Irregular exposure, irregular colors, or noise may appear.
Shooting under fluorescent or LED lighting may result in unnatural color
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reproduction of the illuminated areas.
It takes some time to record images to the card since they are merged
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after shooting. During the image processing, "buSy" will be displayed in
the viewfinder, and you cannot take another picture until the processing is
complete.
Although flash photography is not possible, in low light, raising the flash
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beforehand is recommended, to enable firing of the AF-assist beam
(= 167).
For <A> <B> <C> <D>, clipped highlights and shadows will be
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reduced for a high dynamic range of tones even with high-contrast scenes.
Three images of different exposures are captured continuously for each
shot and merged into a single image.
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