Just had a question. Friend of mine recently bought the M50 w/speed booster and Canon 17-40 f/4L. For some reason we couldn't get the lens to mount to the speed booster. Aligned the red mounting dots and from there, we couldn't get the lens to rotate at all. Just wanted to confirm if it was compatible.
Used to own this lens many years ago, only used on Canon 5D series cameras. As other said it's soft at edges at 17mm/F4, much better at 40mm side. The new EF 16-35L/4.0 IS is much better. I sold FE 16-35 ZA, bought EF 16-35L/4.0 IS in Canon refurbished with additional 15% off deal together with EF 100-400L IS II as then thought own two systems.

MTF (resolution) The EF 17-40mm f/4 L showed an excellent performance in the lab. It's quite safe to assume that the peak performance in the center exceeded the resolution limits of the 8 megapixel sensor of the EOS 350D. The borders are very good though stopping down a little helps to lift up the resolution almost to center quality.

77. Maximum Diameter x Length (mm) 83.5 x 96.8. Weight (g) 475. The EF17-40mm f/4L USM was developed as high-end version of the highly acclaimed EF20-35mm f/3.5-4.5 USM lens released in March 1993. Designed for use by professional and amateur users alike, this lens realizes the outstanding image resolution that distinguishes an L-series lens
This item Canon EF 17-40 mm f/4.0 L USM Ultra-Wide Angle Canon EF Zoom Lens - Black Canon telephoto lens EF 75-300mm F4.0-5.6 III for EOS (58mm filter thread, autofocus) black Canon 344B006 EF 24-105mm f/4.0 L IS USM Lens (Renewed)
Tomm wrote up this fantastic review of the Canon EF-S 17-55mm f/2.8 IS USM lens which he rented over the weekend, curious to know how it’ll stack up against his trusty and loved Canon EF 17-40mm f/4L USM optic. A summary of the comparison thread at Dpreview.com is presented below. Canon 17-55mm pros. Much sharper than the 17-40mm
SLRgear Review April 17, 2015 by William Brawley---Special update: The Canon EF 11-24mm ƒ/4L was named Best Zoom Lens in our 2015 Lenses of the Year awards! Prior to the release of the Canon EF
To learn more about this lens, check out our blog review!
Canon EF 40mm f/2.8 STM. 40mm, 8 user reviews, lab tested . $259: Canon EF 50mm f/1.2L USM. 50mm, 20 user reviews, lab tested Canon EF 17-40mm f/4L USM. 17-40mm, 57 user reviews, lab tested . Buy this product as Renewed and save $340.01 off the current New price. Canon Advanced Two Lens Kit with 50mm f/1.4 and 17-40mm f/4L Lenses (Renewed) $838.99 & FREE Shipping. (2) Works and looks like new and backed by the Amazon Renewed Guarantee. This lens focuses as close as 11 inches (0.28m), and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant Canon EOS 20D Canon EOS 40D Canon EF-S 17-85mm f/4-5.6 IS USM Canon EF-S 60mm f/2.8 Macro USM Tamron AF 28-300mm F/3.5-6.3 XR Di VC LD Aspherical (IF) Macro Reply Reply with quote Reply to thread Complain Considering this becomes a standard ish zoom on a crop camera, and it being F4, I wouldnt recommend buying it. I'd either aim for the 11-20 EF-M, which is native and much wider. Or if you are looking for a more standard zoom the Canon EF-s 17-55 F2.8, which will be a wider focal range and faster aperture, and probably better performance too at At f/4 the 17-40mm is sharper, has less flare and higher contrast. The new 17-40mm f/4L is a welcome surprise though. At nearly half the price of the faster and slightly wider 16-35mm f/2.8L it provides excellent image quality, surpassing that of the more expensive lens in several areas. READ FULL REVIEW. Ken Rockwell. I love my Canon 17-40mm f 6 µm. Introduction Introduced in 2003 the EF 17-40 f/4L USM was one of the first of the lightweight pro-level L-series zooms from the firm adopting a constant f4 aperture. Not only does that make the lens relatively small and more portable compared with the f2.8 varients, but it also helps keep it moderately priced. Full rules of LOTW HERE. This is the cheapest red ring you can buy. It has a good reputation for a generalist lens. It's wide without breaking your budget, it has since been passed in sharpness by it's newer sexier younger cousins the 16-35s (which we will feature another week), but with so many copies in circulation (including my own copy purchased recently for $250 with a chipped filter Review Of The Canon EF 17-40mm f/4L Lens With Sample Photos. Product Images Sample Images. A selection of photos taken with my Canon 17-40 f/4 L lens in Thailand and Singapore. I bought this lens at the same time as buying my first DSLR, a Canon 10D, in 2004. I used it a lot with the Canon 10D and also with the Canon 40D that I bought subsequently.
[LOTW] Canon EF 17-40mm f/4L taken with Canon 5D Mark IV @ f/16, ISO 100, 17mm- The Swift River, Albany, NH Post reviews, articles, and videos of products
Shown above are the Canon EF 17-40mm f/4L USM Lens, Canon EF 16-35mm f/2.8L USM Lens, Canon EF 16-35mm f/2.8L II USM Lens and Canon EF 24-70mm f/2.8L USM Lens. I'm very pleased with the image quality I'm getting from this lens. Wide open results are very sharp in the center and improve only slightly stopped down. Wide angle full frame corners bbF3Qw.