exposure

you'll always want to use the lowest ISO possible because as you say you dont want to have to try and remove the noise becasue you'll never get it 100%

if you've got time then try and get a good exposure with the lowest ISO and if it doesnt come out then knock it up a setting.. continue till its right :p
 
xirokx said:
cheers messiah most appreciated...

can you clarify on the following point you made :-


if the noise and hiss can be cleaned up on using photoshop? or is it best not to think like that to avoid having to touch up / clean up your pictures ?

would you say its best to be of the thinking the cleaner the image the less you have to touch up, as sometimes no matter how hard you try you will never get it 100%

What do you think?
Click to expand...


If you can avoid the noise in the first place, then do. However, as you say you can clean it up afterwards with programs like Noise Ninja, Noiseware etc (Photoshop can do it, but its not great). However, the more cleaning you need to do, the more it chews into the detail and sharpness of a shot. If you are going for a super sharp shot then you want as low an iso as possible. But sometimes its trying to find a balance between shutter speed and sharpness (in terms of iso anyway). For example I did a shoot of a fashion show catwalk. I had to up the ISO to 1600 as the light was so bad, in order to achieve a high enough shutter speed to stop camera shake. I then cleaned the shots up afterwards. This is a much better situation than having a low iso causing the shutter speed to drop, resulting in blurred shots.
 
does lowering the ISO automatically lower the shutter speed? what effect does lowering the ISO have on the aperture then?

If light is bad at night, if u use the flash with lets say a 800 ISO or a 1000 ISO would the shot come out better? i.e. would it compensate for the poor light?

pls clarify

thanks so far
 
xirokx said:
does lowering the ISO automatically lower the shutter speed? what effect does lowering the ISO have on the aperture then?

If light is bad at night, if u use the flash with lets say a 800 ISO or a 1000 ISO would the shot come out better? i.e. would it compensate for the poor light?

pls clarify

thanks so far
Click to expand...

lower the ISO INCREASE the shutter speed.

Think of light as a balance, the camera will need enough light no matter what. So if you take something from one side of the equation, you need to add it to another.

Forget ISO for a sec, if you have an tripod you would leave that alone anyway. think of Aperture and Shutter speed on both sides of the equation instead.
 
xirokx said:
does lowering the ISO automatically lower the shutter speed? what effect does lowering the ISO have on the aperture then?
Click to expand...

Without meaning to sound rude these are the absolute fundamentals of photography and you should read up and understand this before you do anything else.

ISO, shutterspeed and aperture are all linked and changing one will effect the other two.

I'm sure someone can point you in the right direction for an online tutorial :)
 
Aperture effects two things:
A low aperture, for example f/2.8, will allow a lot of light into the camera.
A high aperture, for example f/22, will allow the least amount of light in.

Aperture also effects the DOF (depth of field). A low aperture (f/2.8) will throw the background out of focus (bokeh) on still shots. A high aperture (f/22) will give you a large DOF, meaning everthing behind your focal point will be in focus.

Shutter speed effects the amount of time the shutter will remain open when taking a photo. The less time the shutter is open, the less amount of light is able to pass onto the sensor, so you have to balance the shutter speed with the aperture.
The faster the shutter speed, the less motion you will get in the photo, and the longer the shutter speed, the more motion you will get.

ISO does not effect either the aperture or shutter speed. ISO effects how sensitive the sensor is too light. You would only increase the ISO when you cannot achieve a fast enough shutter speed. Using a high ISO for a long exposure is completely contradictory.

Hope this helps a bit.
 
alexisonfire...cheers for that, thats very helpful indeed...

sidewinder....thats a great link...

you guys are really giving me a lot of info here which is great, sometimes tutorials are not always so straight to the point and can be misleading...

thank you very much
 
eracer2006 said:
this would explain why my daylight photos were grainy on iso 800!

i need a tripod asap!

i still get confused about shutter speed and P mode!
Click to expand...

why do you need a tripod?

just lower the ISO, its daylight, you shouldnt need 800 at all.

if you're still getting confused, RTFM!
 
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