Basic Photography Course

Figure 1-38.Variable focal-length (zoom) lens.

variable focal length from about 35mm to 70mm. They
are usually small and lightweight. They are designed to
be used instead of a normal focal-length lens, not to
replace a range of focal length lenses.

Long-range zoom lenses start at about 35mm and

include the popular 100mm or 105mm focal lengths.
They can take the place of four, fixed focal-length
lenses: the 35mm, 50mm, 85mm, and 105mm.

Telephoto-range zoom lenses have focal lengths

that range from about 50mm to 135mm, 90mm to

23Omm, 75mm to 150mm, and even 135mm to 600mm.

The most popular telephoto zoom is from about 80mm
to 200mm.

Now you have some basic knowledge of the way

light reacts when striking various objects. You also

know how it forms an image through a lens. With
practice, you will be able to apply these principles in
photographic practices. By using various focal-length
lenses and aperture settings, you can control image size
and depth of field as well as the apparent perspective of
your photographs. In the next chapter, light-sensitive
materials are discussed. This will enable you to record
permanent images.

1-37

contents

Basic Photography Course

<- previous page

next page ->


DOFMaster for Windows On-line Depth of Field Calculator DOFMaster for Mobile Devices On-line Depth of Field Table Hyperfocal Distance Chart Articles FAQ Recommended Books Support Contact Links Home As an Amazon Associate I earn from qualifying purchases.	contents <- previous page next page -> Figure 1-38.Variable focal-length (zoom) lens. variable focal length from about 35mm to 70mm. They are usually small and lightweight. They are designed to be used instead of a normal focal-length lens, not to replace a range of focal length lenses. Long-range zoom lenses start at about 35mm and include the popular 100mm or 105mm focal lengths. They can take the place of four, fixed focal-length lenses: the 35mm, 50mm, 85mm, and 105mm. Telephoto-range zoom lenses have focal lengths that range from about 50mm to 135mm, 90mm to 23Omm, 75mm to 150mm, and even 135mm to 600mm. The most popular telephoto zoom is from about 80mm to 200mm. Now you have some basic knowledge of the way light reacts when striking various objects. You also know how it forms an image through a lens. With practice, you will be able to apply these principles in photographic practices. By using various focal-length lenses and aperture settings, you can control image size and depth of field as well as the apparent perspective of your photographs. In the next chapter, light-sensitive materials are discussed. This will enable you to record permanent images. 1-37 contents Basic Photography Course <- previous page next page ->	As an Amazon Associate I earn from qualifying purchases.
	WWW.DOFMASTER.COM © 2006 Don Fleming. All rights reserved.