Benjymocha said:want to know the differences and pros & cons...
what you would prefer and why.
Benjymocha said:want to know the differences and pros & cons...
what you would prefer and why.
You can always put your attention on your camera light meter and adjust aperture/shutter speed properly...+evenstar said:and it can mean a correctly exposed vs underexposed image if you're shooting M mode..
kcuf2 said:lets say a 70-200 f2.8 lens and another lens 70-200 f2.8-4
For the 1st lens 70-200 f2.8, from the range of 70mm to 200 mm, u can shoot it at f2.8, meaning u can maintain a constant speed of 1/200s for example...
but for the other 70-200 f2.8-f4 lens, at 70mm u can shoot at 1/200s, but at 200mm, u can only shoot at 1/100s.
this difference in speed can mean a blur and sharp picture..
Clockunder said:For a F/2.8-F/4 70-200mm lens, if you're shooting at 200mm, the largest aperture you can use is only F/4 (which is 1-stop smaller than F/2.8) which means in situations where a proper exposure can be achieved with using F/2.8 aperture size combined with a certain shutter speed and ISO on the F/2.8 lens, you can only use F/4 and then compensate with a higher ISO or slower shutter speed than a F/2.8 70-200mm lens. In some situations, it could mean not getting the depth of field you prefer (F/2.8 vs F/4) or not fast enough shutter speed (to freeze actions) or too much noise from using a higher ISO.
For example @ 200mm... yr f-stop @ F4, yr shutter metered @ 1/60.Benjymocha said:so if F/4 is just 1 stop smaller, would you compromise and get a F4 instead of F2.8 cos of price?
Benjymocha said:so if F/4 is just 1 stop smaller, would you compromise and get a F4 instead of F2.8 cos of price?