Sigma APO 100-300/4 EX IF HSM دليل المستخدم

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Lens Review...
Sigma APO 100-300/4 EX IF HSM
Text and Photography Copyright Jim Erhardt
All rights reserved.
The decision of what lens to buy for wildlife photography always seems mired in
compromise. Along with the budget limitations most of us face in buying equipment, the
debate over prime lenses versus zooms, and "original equipment manufacturer" versus
"third party manufacturer" cloud the decision making process as well.
While just about every manufacturer offers at least one model in the 7

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● 82mm filter thread diameter ● accessories included: bayonet hood (reversible for storage) and a durable, padded nylon lens case ● street price; approximately $850 In the Field As with Canon's USM lenses, focusing performance is fast and silent with both the EOS 1n and Elan 7E. While no side-by-side comparisons with my Canon EF 300/4L were made in terms of autofocus performance, I can say without hesitation that I did not notice any major difference between the two in this regard. Optical

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