Thursday, June 12, 2014

What Does Telephoto Lens Mean?

What Does Telephoto Lens Mean?

Telephoto lenses, available in every price range, use optics to bring your photographic subject closer. Any lens with a focal length greater than 50mm is technically a telephoto lens.

Prime vs. Zoom

    Shooting with a telephoto lens.
    Shooting with a telephoto lens.

    A telephoto for a digital single-lens reflex may be a prime or zoom lens. A prime telephoto lens has a fixed focal length (as in 100mm), while a zoom telephoto has a variable focal length (as in 70-200mm). According to Darren Rowse, of the Digital Photography School, "Zoom lenses are the most popular DSLR lenses at present and come in a range of configurations and levels of quality."

Weight

    Using a super-telephoto lens.
    Using a super-telephoto lens.

    Telephoto lenses can exceed focal lengths of 600mm; however, a longer focal length results in a heavier lens. When using a super-telephoto (300mm plus), a tripod is often needed to prevent camera shake.

Lens Speed

    A fast lens is more versatile in low-light settings.
    A fast lens is more versatile in low-light settings.

    The speed of a telephoto lens is determined by its largest f-stop or lens opening. By recording more light, a larger f-stop (as in f2.8) allows the photographer greater flexibility in low-light situations.

Price

    Telephoto lenses can be expensive
    Telephoto lenses can be expensive

    Better optics, a longer focal length and a faster lens speed are three factors that will increase the price of a telephoto lens. CNET is a great site to review available lens choices.

Conversion Factor

    APS-C vs. full-frame.
    APS-C vs. full-frame.

    Digital single-lens reflexes are available in both APS-C and full-frame formats. An APS-C camera has a smaller sensor, resulting in lens focal length conversion factor. For example, the conversion factor for Canon APS-C cameras is 1.6x--meaning that a 200mm telephoto would have the equivalent focal length of 320mm.


What Does Telephoto Lens Mean?

Telephoto lenses, available in every price range, use optics to bring your photographic subject closer.

Enhance your photography skill,The Top Secret Photography Techniques

. Any lens with a focal length greater than 50mm is technically a telephoto lens.

Prime vs. Zoom

    Shooting with a telephoto lens.
    Shooting with a telephoto lens.

    A telephoto for a digital single-lens reflex may be a prime or zoom lens. A prime telephoto lens has a fixed focal length (as in 100mm), while a zoom telephoto has a variable focal length (as in 70-200mm). According to Darren Rowse, of the Digital Photography School, "Zoom lenses are the most popular DSLR lenses at present and come in a range of configurations and levels of quality."

Weight

    Using a super-telephoto lens.
    Using a super-telephoto lens.

    Telephoto lenses can exceed focal lengths of 600mm; however, a longer focal length results in a heavier lens. When using a super-telephoto (300mm plus), a tripod is often needed to prevent camera shake.

Lens Speed

    A fast lens is more versatile in low-light settings.
    A fast lens is more versatile in low-light settings.

    The speed of a telephoto lens is determined by its largest f-stop or lens opening. By recording more light, a larger f-stop (as in f2.8) allows the photographer greater flexibility in low-light situations.

Price

    Telephoto lenses can be expensive
    Telephoto lenses can be expensive

    Better optics, a longer focal length and a faster lens speed are three factors that will increase the price of a telephoto lens. CNET is a great site to review available lens choices.

Conversion Factor

    APS-C vs. full-frame.
    APS-C vs. full-frame.

    Digital single-lens reflexes are available in both APS-C and full-frame formats. An APS-C camera has a smaller sensor, resulting in lens focal length conversion factor. For example, the conversion factor for Canon APS-C cameras is 1.6x--meaning that a 200mm telephoto would have the equivalent focal length of 320mm.



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