Canon EOS Digital Rebel problem

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computerwiz5

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I am having a dilemma with my Canon EOS Digital Rebel. The 3 problems I am facing is the shadow behind the finial, and the focus. There are a lot of manual and automatic modes but I don’t know which one to set it on. Right now I have the mode set to portrait. I have been messing around with the aperture and iso speed. I have the finial on a white surface. When ever I take the picture I get a gray background and the light source is day light and halogen, I have tried both. The shadow is coming from the flash, so I don’t know what mode it should be on.

Thanks
Danny

 

etaf

Wayne
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well theres a lot of questions there and a number of answers -

so first
exposure
the camera is set to expose at a average gray tone - so it will try and make the white gray - same happens on snow.....

so you need to allow a bit more light in
now as you are using flash theres a number of ways to do that.
1) over exposure setting in camera
2) over exposure setting on flash

focus
how close is the subject at what lens are you using

i suspect you need a macro lens as you are to close for the subject
or you have the speed set to slow and getting camera shake

shadow
bounce the flash
or
use a white card at the side to bounce light back into shadow
 

buck52

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Good suggestions by etaf...

first thing I would try is skip the flash ..use a tripod... shut the focus assit light off and use the timer delay...meter on the darker area and use about -1/3 exposure...

Not sure how that will do with that camera but experiment till it does not blow the highlights in the histogram

If you must use the flash then it needs to be bounced or you need a fill flash from the back

edit... wanted to add...use manual focus

buck
 

buck52

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If your using built in flash it's difficult for what you are trying to do that's why I suggested no flash and a longer exposure time on a tripod...

you could try a bright light aimed at bounce card or white sheet to light the back of the subject
 

etaf

Wayne
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put the object next to a window - so you get some natural light.
say you get a reading of
1/60th @ F8
then you need to let more light in - in order to make the white white and not gray
try increasing by 1/2 stops upto 2 or 3 stops over exposed- (BTW also called bracket where the camera does it automatically)
1/60th @ f5.6 is 1 stop more light

also play by putting some white card around to bounce the light back into the object
also try a black card on that image you will get quite an effect around the glass
 

computerwiz5

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Jun 25, 2002
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ill try that but i dont know what those terms mean, F8, stops, 1/60 of what? I am so confused

Thanks
 

buck52

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don't use the flash...

if you have a tripod use it and set the camera to timer...press the button half way till the focus beeps then all the way and get away...let the camera do it's thing
 

etaf

Wayne
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no problem
you may want to have a look at some photography tutorials
some are own
www.photo.net
http://www.dpforums.com/

otherwise search the web
get some magazines etc

so let me try and explain a little

the aperture F - is the size of the hole in the lens which you adjust. depending on lens depends on the largest hole available
the number is a ratio - but we will not worry about that

so F2.8 is a big hole lets lot of light in - F16 is a small hole and lets less light in

F4 lets half as much light as F2.8
F5.6 half as F4
F8 half as F5.6
etc
etc
twice/half as much light is called a stop - hence 2 Fstop's = change from say 2.8 t0 4 to 5.6

Now the speed - this is the time the shutter is open to allow light to fall onto the sensor or film.

1/60th = 1/60th of a second

1/125th lets in half as much light

so
1/60 - 1/125 - 1/250 - 1/500

so thats how we control the light to expose the film

so if the exact amount of light needed is 1/60 @ f8
thats open the hole which is F8 size for 1/60th of a second

thats assumes the scene you are photgraphing is average gray -
but white needs more light in
so allow more light in by
1) changing the size of hole
or
2) the time the light is allowed on the sensor

have a read here
http://shutterbee.thinkrandom.com/
http://www.photoxels.com/tutorial_aperture.html
http://people.clarkson.edu/clubs/cupc/cameratutorial.html
http://www.howstuffworks.com/digital-camera2.htm
http://www.homestead.com/image_master/digitalcameratips.html
 
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