8_Aper­ture pri­orit y

De­cid­ing how much of the scene is in fo­cus can make or break the im­pact of your shots, so here’s how to con­trol it

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The amount of a scene that’s sharp in front of and be­hind the fo­cus point is known as depth of field. Depth of field is af­fected by three fac­tors: the aper­ture, the fo­cal length of the lens, and the dis­tance be­tween your cam­era and the sub­ject. Once you have de­cided on a com­po­si­tion, the fo­cal length and the dis­tance will re­main al­most con­stant, so the main vari­able that you can con­trol to al­ter the depth of field in your shot is the aper­ture. in a pleas­ing im­age. It’s al­ways worth check­ing that you haven’t gone too far. The best way to take con­trol of the depth of field is to set your cam­era to aper­ture-pri­or­ity mode. You can then use the in­put dial to se­lect the aper­ture you want, and the cam­era will au­to­mat­i­cally se­lect the shut­ter speed for you.

You need to use large aper­tures, such as f/4 or f/2.8, to get images with very lit­tle in fo­cus in front of and be­hind the fo­cus point, and small aper­tures, such as f/11 or f/16, when you want to keep as much of the scene in fo­cus as pos­si­ble.

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