EOS S.O.S
Our technical guru is here to help. No Canon conundrum is too
big or small. Get in touch today at [email protected]CANONSCHOOL
84 http://www.digitalcameraworld.com
BRIAN WORLEY
CANON PRO
Brian is a freelance photographer
and photo tutor, based in
Oxfordshire. He has unrivalled
EOS DSLR knowledge, after
working for Canon for over
15 years, and is on hand to
answer all your EOS and
photographic queriesWhy does the background behind my
subject go really dark when I use a flash
on my Canon EOS 250D?
Theresa Reynolds, JedburghBRIAN SAYS... The EOS
250D uses a revised set of
programming for flash
exposures, it’s most obvious
with flash photos taken in
Aperture Priority mode
indoors. Up until the EOS R,
DSLR cameras could use any
shutter speed down to 30
seconds with flash in
Aperture Priority. That
changed with the EOS R and
for all subsequent R series
and DSLRs. Now the priority
is to avoid camera shake, sothe camera never uses a
shutter speed slower than
1/60 sec with flash in
Aperture Priority mode.
There’s a custom setting in
the camera Speedlite menu
that changes the slow sync
behaviour so it will work like
older DSLR cameras, with the
shutter speed down to 30
seconds. This results in better
balance between flash and
ambient light, but does
slightly increase the risk of
camera shake.BRIAN SAYS... Dust delete
data is used to store a map of
where the dust spots are in
your camera. This dust map
is then saved inside each
photo you take. As you can
see there’s a date to show
when you last updated the
dust map information. To
create the map you need to
follow the menu and take a
photo of a plain flat white
surface, such as a sheet of
copier paper in good lighting.
The camera will set
settings for exposure, and
particularly aperture. Dust
shows up more noticeably
when you stop the aperture
down a lot. Macro and
landscape photographers
using f/11 and beyond are
most likely to notice it.Once your dust delete
data is saved, you can keep
shooting. Open your images
in DPP, as that is the only
software that works with dust
delete data. You can select
Adjustments>Apply dust
delete data from the menu, or
edit the dust spots using the
dust delete data from the
dust and stamp tool.I was looking through my camera
menu and found dust delete data, whatdoes this do and how do I use it?
Tess King, Stourpor tChange the slow sync behaviour to get a better balance between
flash and ambient light, but be aware of possible camera shakeDPP is the only software to use the stored dust delete data, and it can
save hours of retouching individual images with many dust spotsChoosing dust delete data from
the menu, you need to make a
photo of a plain smooth surface
like a sheet of paper