Title: Best Deal Around!
Review: Canon really earned their money with this lens! It is difficult and expensive to manufacture, and has a large aspherical lens as the front element for performance approaching apochromats. Version II of this lens has just been released, but it sells for twice the price. Of course, the TS-24mm has long been standard for architectural photograpers, but don't forget about the tilts! Tilts make possible a range of compositons many artists would overlook. The lens is heavy and built like the proverbial tank--it is happy sitting on a tripod--I need one because it's not so easy to work the controls and also keep your subject aligned in the frame.
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