Dao
No longer a newbie, moving up!
And learn more about the depth of field.
Just play around with the DoF calculator. F1.8 is not always the problem. It is Aperture and the subject to camera distance.
For example: 50mm F/1.8 lens on a 1.6x crop camera
Subject is 4 ft away from the camera, the Dof is only 0.13 ft. And as manaheim said, if the nose is in focus, the eye may not be in focus.
Subject is 8 ft away from the camera, the Dof is 0.52 ft. So if the nose is in focus, the eyes are .. most likely in focus.
Subject is 11 ft away from the camera, the Dof is 0.99ft. Well, I am pretty sure the the subject should be in focus.
However, if you really need to frame the subject in the way that you need to have the camera closer to the subject, then you may need to change the aperture.
i.e.
Subject is 4 ft away from the camera, the Dof will be 0.52 ft when the aperture is f/7.1, just like F/1.8 with 8 ft away
Just play around with the DoF calculator. F1.8 is not always the problem. It is Aperture and the subject to camera distance.
For example: 50mm F/1.8 lens on a 1.6x crop camera
Subject is 4 ft away from the camera, the Dof is only 0.13 ft. And as manaheim said, if the nose is in focus, the eye may not be in focus.
Subject is 8 ft away from the camera, the Dof is 0.52 ft. So if the nose is in focus, the eyes are .. most likely in focus.
Subject is 11 ft away from the camera, the Dof is 0.99ft. Well, I am pretty sure the the subject should be in focus.
However, if you really need to frame the subject in the way that you need to have the camera closer to the subject, then you may need to change the aperture.
i.e.
Subject is 4 ft away from the camera, the Dof will be 0.52 ft when the aperture is f/7.1, just like F/1.8 with 8 ft away