EOS 90D How to use Depth of Field preview button

[Ramsden]

Hi Folks 

EOS 90D from across the pond here.

Just looking for a bit of advice/help on the Depth of Field preview button.

To be perfectly honest I haven't used it in anger and wondered if I'm missing a trick as aim to improve my skills.

Also, in my guide book it says that I can alter the setting via Exposure Simulation option in Shooting Menu 2 by selecting Disable.

See attached photo - its not obvious.

Thanks for any tips and advice.

Ramsden

[Ramsden]

 

[stevet1 · Accepted solution]

Ramsden,

One way that you can use your DOF Preview button is in conjunction with your exposure lock button.

On my camera at least, the exposure lock button locks your exposure, but only holds that lock for approximately 6 seconds. If you press the exposure lock button (most commonly the * button), and then press and hold the DOF Preview button, it will hold that lock for as long as you want.

On my camera (a T8i), pressing the AF ON button will also hold that exposure lock, and that is the one I use, but the DOF Preview button will do the same thing.

Steve Thomas

[ebiggs1]

The DOF button stops down the lens aperture to whatever is  the selected lens setting. It supposedly allows you to see the range of focus in the viewfinder. However, it may darken the VF on some models to almost worthless and may not be a very good option.

[Ramsden]

Hi EB

Yes, mine just darkens the VF. Not much use as it is.

R