Canon pc 1591 manual manual#
Canon pc 1591 manual software#

But it's priced at a premium, in part due to its compact design, and while we didn't expect it to be impeccable like the EF 70-200mm f/2.8L IS II USM ($998.95 at Amazon), we were hoping for better performance than this. If the Canon EF 70-300mm f/4.5-5.6 DO IS USM was a budget-priced lens, we could forgive some of its shortcomings.

Zooming to 275mm weakens performance at each of those apertures by about 100 lines on average, with similar issues as you move away from the center of the frame. At f/11 the lens manages 1,630 lines on average the center third of the frame shows about 2,000 lines, but the middle third doesn't quite hit 1,500 lines and the edges show just about 1,000 lines. Stopping down to f/8 improves the score to 1,425 lines, but only the center third is reasonably sharp (1,723 lines). At 220mm it shows just 1,188 lines, with all but the center third of the frame below 1,000 lines. At both focal lengths, the lens shows about 2 percent pincushion distortion, and is quite soft at its maximum f/5.6 aperture. We tested at 220mm (the longest angle we could set the lens and shoot the entirety of our test chart) and 275mm. At f/11 the lens manages 2,147 lines, and edges improve to 1,625 lines. It shows 1,840 lines at that aperture with even sharpness through most of the frame, but edges are noticeably fuzzy (1,246 lines). There's a very modest improvement at f/5.6, but you'll need to set the lens to f/8 to cross the 1,800-line mark. There's 1.9 percent pincushion distortion, which makes straight lines appear to curve inward noticeably, and at the maximum f/5 aperture, the center-weighted sharpness score is just 1,620 lines, with softness through the midpart (1,396 lines) and edges (881 lines) of the frame. Distortion is a nonissue at 70mm.ДЄt 120mm the lens performance suffers greatly. It isn't until you set the lens to f/8 that you get even sharpness across the frame, with a center-weighted average score of 2,226 lines. Stopping down to f/5.6 boosts the overall score to 2,121 lines, and improves the center-third to over 2,000 lines, but the edges still show just 1,591 lines. The lens is at its best at 70mm at f/4.5 it scores 1,902 lines per picture height on our center-weighted sharpness test, a bit better than the 1,800 lines we use as a cutoff for acceptable image quality, but the middle third of the frame shows just 1,767 lines and edges are softer at 1,515 lines. I used Imatest to check the sharpness of the 70-300mm when paired with the full-frame 20-megapixel EOS 6D ($1,999.99 at Amazon). Canon includes a lens hood and a soft carrying case with the lens.

Canon pc 1591 manual manual#

Other controls switches include toggles that change between automatic and manual focus, enable or disable optical image stabilization, and set the stabilization mode to its standard function or to mode 2, which is used when panning the camera to track a subject during exposure. The zoom ring is located near the lens mount, with the manual focus ring placed toward the front element of the lens. The lens just about doubles in length when zoomed to 300mm, and there's a locking switch on its barrel that you can set so that it doesn't extend when it's at your side or tucked away in your camera bag. But its maximum magnification is only 0.19x, just about one-fifth life size, so calling it a macro lens is a bit of a stretch, especially when you consider the distortion that it introduces to images when zoomed in. It can focus to 4.6 feet, which is good enough for Canon to qualify it as a macro lens. The 70-300mm ($1,099.00 at Amazon) measures just 3.9 by 3.2 inches (HD) when set to the 70mm position, weighs 1.6 pounds, and supports 58mm front filters. If you're going to spend this much on a Canon telezoom, we recommend the EF 70-200mm f/4L IS USM ($1,079.00 at Amazon) its telephoto range isn't quite as long, but your images will be noticeably crisper. Its DO designation refers to a design that incorporates diffractive optics, which helps keep the size down, but its image quality isn't up to snuff when compared with more traditional lens designs. The Canon EF 70-300mm f/4.5-5.6 DO IS USM ($1,399) is quite compact when you consider its zoom range and compatibility with full-frame cameras.

Canon pc 1591 manual software#

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