Camera jargon

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Gizza22196

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Paul
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I have a couple of things I have heard mentioned but don't know how to utilise them
First one in apeture, I know what it means (the size of the hole in the lens which determines how much light is let through to the sensor) but how do I correspond them to the shutter speed to make the most of my camera?

The other one is ISO, I don't know what it means but I think it's something else that needs to be set in correspondence with shutter speed and apeture

Last one - I have heard manual and automatic mentioned but don't know what features ther are referring to that it affects

Thanks for your help
 
There are three factors that affect exposure, aperture (how big the hole is) shutter speed (how long the shutter is open) and ISO (how sensitive the camera is to light)

Smaller apertures give greater depth of field (DOF) which means more of the image seems to be sharp from closer to further away. Using a large aperture can be used to put the background out of focus so that your subject being sharp stands out more.

Shutter speeds, use faster ones for moving subjects ie 1/500 for birds for example, also faster shutter speeds helps stop camera shake (wobbly hands). There is a rule of thumb that for a 500mm lens the minimum should be 1/500 for example.

For ISO setting it the lower the better as a general rule, but if the light is poor and it's a bit dark to get a decent exposure you should increase it. Better to shoot a 1/50 f8 and ISO 800 than say 1/6 f8 and ISO 100 as then you may get camera shake or the subject moves, flower blows in the breeze resulting in a blurred shot.

I suggest you get hold of a copy of a book called Understanding Exposure. http://www.amazon.co.uk/Understandi...9390/ref=sr_1_3?ie=UTF8&qid=1355824031&sr=8-3
 
And don't forget that the smaller the aperture, the larger the "f" number.
(ie - f22 is a small aperture and will give a large depth of field. f2.8 is a large aperture and will give a shallow depth of field)

You just have to balance the 3 (ISO, Shutter Speed & Aperture) to get the shot you want. Put you camera in manual mode and play. See what happens to the image when you increase the various settings. :thumbs:


Gareth
 
wippers said:
And don't forget that the smaller the aperture, the larger the "f" number.
(ie - f22 is a small aperture and will give a large depth of field. f2.8 is a large aperture and will give a shallow depth of field)

You just have to balance the 3 (ISO, Shutter Speed & Aperture) to get the shot you want. Put you camera in manual mode and play. See what happens to the image when you increase the various settings. :thumbs:


Gareth
Click to expand...

that explanation is wonderful.thankyou. Sorry for highjacking the thread
 
Also remember to keep the ISO as low as possible to avoid noise in the image. Higher ISO will generally make an image noisy/grainy, so only up the ISO when the correct aperture and f stop will not give the correctly exposed image you want. :thumbs:
 
Some great explanations here :) The Understanding Exposure book is very good - I bought that early on when I started learning about photography and it was a great help. Don't worry if you still don't understand everything at first. The more you photograph, the more you will start to understand how all the different elements work together!
 
Thanks for all the help, I've got the general idea now, just waiting for my camera to arrive so I can put theory into practice
 
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