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Sigma 150-500mm f/5-6.3 AF APO DG OS

150-500
Review Date: Jun 22, 2008 Recommend? yes | Price paid: $1,130.00 | Rating: 10 

 
Pros: Sharp images from 150 to 500mm at full aperture. Very good results with 1.4 TC. Fast AF and very effective OS. Ergonomy, well balanced, price.
Cons:
Need the latest firmware if you use 40D AI SERVO

For one week I used these lens, and I am still impressed with the image quality, even at 500mm with 1.4 TC! The Bigma was not doing a good job with 1.4 TC. The balance of the 150-500mm is better than the 50-500mm because the weight is more concentrated near the camera body. The AF is very fast and don't hung like the 50-500. The OS made a fantastic job, like taking shoot of flying bird. The build quality is like the Bigma. The owner of 40D have to take care of the serial number of the lens, because the lens with serial number before 1007001 will have to be send to Sigma for firmware update, to increase the speed when using AI SERVO. For the price or not, this is a fine quick lens with very good ergonomy and image quality.