The Canon EF 400mm f/2.8L IS USM Lens' superior optical quality will not disappoint. Overall optical quality is simply excellent - color, contrast Distortion is negligible, CA is extremely well controlled, vignetting is minor. The Canon EF 400mm f/2.8L IS USM Lens is razor sharp corner-to-corner wide open and stopped down.
The first L-series lens I refused to recommend, the Canon EF 16-35mm f/2.8 L II USM.Read the article at:http://blogdozack.com.br/index.php/portfolio/canon-ef
The Canon EF 16-35mm f/2.8L II USM covers an impressive wide-angle field of view at an f/2.8 aperture, a feat for a prime lens, and delivers the added convenience of a 2x zoom design.
This Canon lens is an ultra-wide-angle optic with a fixed f/2.8 maximum aperture. Having a large maximum aperture is useful for astrophotography because it enables you to get much better images in low light. That’s because the lens allows more light to pass through to the sensor.
8.75 x 5.5 x 5.3". Buy Canon EF 16-35mm f/4L IS USM Lens featuring EF-Mount Lens/Full-Frame Format, Aperture Range: f/4 to f/22, Two Ultra-Low Dispersion Elements, Three Aspherical Elements, Super Spectra and Fluorine Coatings, Ring-Type Ultrasonic Motor AF System, Optical Image Stabilizer, Weather-Sealed Construction, Rounded 9-Blade Diaphragm.Buy on Amazon.com From $2,199.00. The Canon 16-35mm F2.8L II has been one of the most popular and sought after lenses in landscape photography thanks in part to its distinct and gorgeous sunstar. That said, the lens did have its fair share of issues. We took the updated version of the lens out for a spin to get a feel for its performance. TRacp.