Tuesday, November 1, 2011

A Comparison Of Macro Lenses For A Digital Slr Canon

A wide variety of macro lenses are available for Canon DSLRs


Dedicated macro lenses are available for Canon DSLR cameras, allowing detailed close-up photographs to be taken. Canon manufactures its own lenses. Quality lenses are also made by Sigma, Tamron and Tokina.


Types


Macro lenses come in a range of fixed focal lengths from 50mm to 180mm and beyond. Most feature auto-focus, some are manual focus only. True macro lenses capture images from life size (1:1) to 5x or greater magnification. Zoom lenses may include a macro feature that allows shooting at 1:2 or less, but not 1:1.


Manufacturers


Canon produces several fast prime macro lenses at a range of focal lengths. Sigma, Tamron and Tokina are well-known manufacturers producing macro lenses compatible with the Canon EF system.


Alternatives


There are several alternatives to buying a macro lens. Extension tubes can be used with non-macro prime or zoom lenses to increase magnification and reduce minimum focusing distance. A reversing ring allows ordinary lenses to be mounted back-to-front on the camera, offering high magnification.


Considerations


Choose a lens with focal length and minimum focusing distance suitable for the subjects you'll shoot. Greater length lets you stand further from the subject. A smaller focusing distance lets you move the lens closer.


Use a macro lens instead of a zoom lens's macro function if you want 1:1 or higher magnification.


Third-party lenses may cost less than Canon ones, but consider quality and compatibility issues. High quality lenses generally cost more. Consider buying lenses second-hand.







Tags: macro lenses, focusing distance, available Canon, focal lengths, lenses available, lenses available Canon, macro lens