Top critical review
28 people found this helpful
A good lens when limits are understood
on December 23, 2010
I own several top quality Canon 'L' Lenses, so I am used to using the very best lenses.
The instructions for this lens state: 'Do not focus in MF [Manual Focusing] when the focus mode is set to AF [Auto Focus].'
The top of the line Canon Lenses allow you to tweak the focus Manually after the Auto Focus has done the best it can.
The Auto Focus is slower than that of 'L' lenses.
I captured a shot of the moon and the color aberrations on the on the edges of the moon were quite visible when the images where viewed at 100%.
This is not a professional quality lens which costs $1,000 more than this lens.
The lens at 300 mm f/5.6 is 6 stops slower than the f/2.8 lens, meaning the exposure time must be 6 times longer than the f/2.8 'L' lens.
This is not a lens to shoot Weddings in a dark Church where flash is not permitted. This is not a lens to capture car races.
Used outdoors in sunlight, this lens is quite acceptable. Do you want to take a photo of your child at bat in a day baseball game?
This lens will meet your needs at $1,000 less than an 'L' quality lens.
If you didn't understand what I mentioned about color aberration, and you don't use manual focus tweaking, and you don't want to 'freeze frame' fast motion, and you don't have a creative effect in mind that requires the lens open more than f5.6, this lens is a very cost effective lens.
As a final note, while I own other Canon lenses that cost about 10 times as much as this lens, I am keeping this lens with a complete understanding of the limits of when I may use the lens effectively.
It is a great value for the money!