Focus and Focal Length For Digital Photography

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Focus and Focal Length For Digital Photography

Friday, March 19th, 2010 Subscribe To Our Feed

Digital photography is a great thing as a hobby. It is now a completely do it yourself process as lengthy darkroom processes have been omitted by digitalization. With a little practice and effort you can take great footage. There are things you want to master rigorously when shooting with a DSLR if you want to take good pictures. This article covers a very important one- focus and focal length.

The sharpness of a picture depends on targeting the lens in the correct way. The lens has many elements inside which can be changed by pushing- pulling or rotating the lens ( depending on the lens ) for each particular gap between the subject and the camera. All digital cameras and lenses offer automatic focusing where the camera focuses the lens on the topic when the shutter is a touch depressed. But using manual focusing options you may be more creative. Move the focus mode switches on the camera and the lens to manual to start focusing by hand.

While pointed focus of the subject is excellent for most photos in a number of cases making the topic out of focus completely or barely produces some extraordinarily fascinating effects. For instance you can convey a dream like atmosphere in an image of a child if you can manage to create a soft focus which is a very slight off focus together with an exceedingly shallow depth of field. Depth of field can be made shallow by using bigger f numbers, lenses with long focal lengths ( zoom or tele lenses ) and by shooting from a distance from the subject.

A focal length of 45- 50 mm is regarded as the ordinary focal length as it offers the same view as the human eye. Lenses with bigger focal lengths are the tele lenses while the ones with smaller focal lengths are the wide lenses. Lenses with variable or adjustable focal lengths are the zoom lenses.

Wide lenses tend to stretch the image giving them a breathtaking appearance. So use them for landscapes. It goes without saying that they are going to give you a wider coverage and bigger depth of field which you’ll need to shoot landscapes.

To shoot portraits and models employ a moderate focal length like 70 to 90 mm. This can effectively blur out the background without making the depth of field too shallow and will give you crisp portraits.

If you want to shoot animals and birds opt for a minimum of two lenses. You can go in for tele zooms as they are going to give you a gigantic range of coverage. Ideal will be a 90- 300mm and a 300- 500 mm lens. This will let you shoot most subjects from a distance in order to not to annoy them or put yourself in danger.

For shooting concerts and shows use medium zooms like 35- 70 mm or 24- 70mm as they give you a bit of both wide and tele in one lens. In this way you do not have to switch lenses in the middle of a program. You can miss crucial parts of the program if you have to change lenses and you may finish up annoying your neighbors.

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