circles in digital prints
the Mink
appearing on prints. returned camera to maker who returned it with message
that tests had shown no faults and that all digital cameras have the same
fault i.e. that using flash will cause these circles. I've been using
digital for several years and never had this prob ( and this IS a problem,
they're very invasive!!) so...are Samsung ducking their responsibility or do
others get these pesky circles?
tia,
Mike
John Inzer
Could be light from the camera's flash
reflecting off of dust particles in the air
and/or on the lens. Even though it could
happen with any digital camera...it would
be more pronounced (larger spots) when
using a low resolution camera.
Have a look at the following article:
Depth Of Field
http://toothwalker.org/optics/dof.html
(Scroll down to: Flashlight and ghosts)
--
J. Inzer MS-MVP
Digital Media Experience
Notice
This is not tech support
I am a volunteer
Solutions that work for
me may not work for you
Proceed at your own risk
the Mink
answered many questions. It has however raised a few more which I wonder if
you can help with...
accepting the reasons why they occur, and that they don't always occur, -
can they be avoided by any techniques e.g. using larger apertures/ different
film speed etc;
also can there be a reason this didn't happen for 6 months, a few times then
nothing now almost all the time?
is it about dust inside the camera/on the sensor itself or anything we can't
control (I've got the in-laws thumping cushions to make the air dusty to see
if its more apparent! they're 100 miles away so any asthma attacks are
they're own prob!
cheers,
Mike
John Inzer
> thanks John, helpful as ever and that article part re Flashlight and
> Ghosts answered many questions. It has however raised a few more
> which I wonder if you can help with...
I'll try but I am certainly not an expert on
Digital Cameras or the spots that randomly
occur on digital images.
=============================
> accepting the reasons why they occur, and that they don't always
> occur, - can they be avoided by any techniques e.g. using larger
> apertures/ different film speed etc;
Anything you can to to limit the amount
of light that enters the lens when the photo
is taken would help. Use natural light...
no flash. Stand with the sun behind you.
I used to get the spots frequently at little
league games when the sun was opposite
where I was sitting. Sometimes I could
even see them on the LCD. Move to a
different seat...different angle...fewer spots.
And...keep the lens as clean as possible.
==============================
> also can there be a reason this didn't happen for 6 months, a few
> times then nothing now almost all the time?
==============================
Dust accumulates.
Keep the lens as clean as possible...those
little wipes that people use to clean eyeglasses
are useful.
==============================
> is it about dust inside the camera/on the sensor itself or anything
> we can't control (I've got the in-laws thumping cushions to make the
> air dusty to see if its more apparent! they're 100 miles away so any
> asthma attacks are they're own prob!
> cheers,
> Mike
==============================
Sorry...I'm not aware of any scientific methods
for testing the dust theory. But I do know that
higher resolution cameras do not suffer from
the problem. Why...you ask? Because you
have more pixels in the same area which means
they are smaller which in turn means the spots
(even if they are still there) are smaller also
and are probably not noticable.
Bottom line IMHO....the purchase of a new
high resolution camera should solve the problem.
I bought a 10 MP Canon recently for $99.95...
so the prices are certainly within reason now.
Crash!!!
Ooops...I fell off of the soapbox.
the Mink
Mike