few questions

Lets see if i was, Questions where,

1 why do you compensate for changes in shutter speed by adjusting aperture -I answered because longer shutter speeds reduce exposure. Is this correct? other options where long exposures lead to unsharp images, dof is less with long shutter speeds. amount of light reaching film is reduced.

2 whats the slowest shutter speed you can safely use using a 35mm film camera with a 300mm lens hand held - i answered 1/500th sec. other options where 1/60, 1/125, 1/250.

Hope i am now!! :bonk:
 
jc101 said:
Lets see if i was, Questions where,

1 why do you compensate for changes in shutter speed by adjusting aperture -I answered because longer shutter speeds reduce exposure. Is this correct? They increase exposure. other options where long exposures lead to unsharp images, Long exposures increase the possibility of camera shake and subject movement.dof is less with long shutter speeds. Longer shutter speeds require a higher f/number, which gives more DoF.amount of light reaching film is reduced. Increased.

2 whats the slowest shutter speed you can safely use using a 35mm film camera with a 300mm lens hand held - i answered 1/500th sec. other options where 1/60, 1/125, 1/250.It depends how steady you are, and camera shake is never eliminated, it is just reduced. The rule of thumb is that your shutter speed when using a full frame camera should not be longer than the focal length of the lens, so 1/300sec. Multiply that by the crop factor for crop format cameras.

Hope i am now!! :bonk:
Click to expand...

Go to the back of the class :D
 
jc101 said:
Lets see if i was, Questions where,

1 why do you compensate for changes in shutter speed by adjusting aperture -I answered because longer shutter speeds reduce exposure. Is this correct? other options where long exposures lead to unsharp images, dof is less with long shutter speeds. amount of light reaching film is reduced.

2 whats the slowest shutter speed you can safely use using a 35mm film camera with a 300mm lens hand held - i answered 1/500th sec. other options where 1/60, 1/125, 1/250.

Hope i am now!! :bonk:
Click to expand...

and there's me thinking a shorter shutter speed would reduce the exposure ,,,:bonk:
 
DOOOH, I Meant increase not reduce, got confused with the other options. Didnt point out that these where multiple choice. so could be 2 correct answers - increased exposure and un sharp images.

Question 2- There wasnt an option for 1/300th so went for 1/500th, should i of gone for 1/250th?
 
jc101 said:
DOOOH, I Meant increase not reduce, got confused with the other options. Didnt point out that these where multiple choice. so could be 2 correct answers - increased exposure and un sharp images.

Question 2- There wasnt an option for 1/300th so went for 1/500th, should i of gone for 1/250th?
Click to expand...

Not if you don't have to. But crop factor on your 1000D? Have you got any movement on f/number or ISO? Do you have IS/VR?
 
HMMMM, Bit confused with question one as there is only one correct answer.

The question was, why do you compensate for changes to the shutter speed by adjusting the aperture.
The answers where,

A)Longer shutter speeds increase exposure
B)Longer exposures lead to unsharp images
C)Depth of field is less with longer speeds
D)the amount of light reaching the film/sensor is altered.

Doesnt help i read it wrong the first time! but by previous comments b,c and d could be correct! :thinking:
 
for the correct exposure a certain amount of light must hit the sensor / film ,,,if you alter the shutter speed you change the amount of light that hits the film , so you have to either let in more light or stop more light by using the aperture blades .
 
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