The resolution test of the Canon EF 40 mm f/2.8 STM was based on RAW files from the Canon EOS 1Ds MkIII body. In the case of that camera the decency level is situated near 30-32 lpmm and the best fixed-focus lenses can reach as high as 44-46 lpmm. Let’s glance at a graph below to see how the tested lens fares in the frame centre, on the edge Canon Ultrasonic EF 17-40 mm F/4.0 L Series USM Lens. Sponsored Sponsored. £295.00 + £34.90 P&P + £34.90 P&P. Canon EF 70-200mm f2.8 L IS II MK2 USM Lens. £126.00 But it does not effect to photo. USD 30.00 USD 30.00 USD 40.00 USD 60.00. "READ" Canon EF 135mm f/2.8 SOFT FOCUS Prime Lens AS IS from Japan Free Shipping. Overview. A unique and indispensable addition to Canon's series of EF lenses, the new EF 40mm f/2.8 STM offers an ultra-slim and lightweight design. Incredibly compact in size, the EF 40mm f/2.8 STM delivers high image quality from the center to the periphery thanks to its advanced lens configuration including an aspherical element, a bright 2.8 aperture, and optimized coatings that minimize ghosting and flare while providing exceptional color balance. Canon EF 40mm f/2.8 STM Review Introduction The new Canon EF 40mm f/2.8 lens is the second one that Canon has equipped with its new Stepping Motor Technology (STM) system that allows that allows not just fingertip editing, but also the ability to provide continuous tracking of moving objects both rapidly and quietly, making it perfectly able to answer the exigencies of video. f/2.8: 2: f/2.8: f/2: Maximum Focal Length: 40 millimeters: 24 millimeters: 40.0 millimeters: 35 millimeters: 40 millimeters: 22 millimeters: Maximum Aperture Range: F2.8: F2.8 — F2.0 — F2.0: Maximum Format Size: 35mm full frame: APS-C / DX: Full Frame: 35mm full frame: Full Frame: APS-C / DX: Minimum Aperture: 22: 22 — 22: 2.8: 22: Minimum Focal Length: 40 millimeters: 24 millimeters: 40.0 millimeters yxLVI. The Canon EF-S 17-55mm f/ IS USM Lens, with a fast, fixed f/ aperture, very high image quality, 3-stop Image Stabilization and a very popular focal length range, is one of the best general purpose lenses available. Since EF-S lenses only mount on Canon EF-S bodies - which all feature a FOVCF - the 17-55mm focal length range always equates to the field of view of a lens mounted on a full-frame Digital SLR. This range covers what I consider to be the most important focal lengths for a Canon general purpose lens. This is a focal length range that can be used for everything from a wide scenic landscape to a relatively-close portrait. Canon already had these focal lengths similarly covered in their econo kit lens - the Canon EF-S 18-55mm f/ Lens. Reality is that these are vastly different lenses - in build, optical and feature qualities - and price. The kit lens is a good value for the money, but does not compare with the 17-55 IS. Canon already had a superset of the 17-55mm focal length range covered with the Canon EF-S 17-85mm f/ IS USM Lens. The EF-S 17-85 IS has a higher build quality, image quality and feature set than the EF-S 18-55 - adding Ring USM and 3 stop image stabilization to the feature set. What the 17-55 IS adds to the 17-85's feature set is a fixed f/ aperture and L-Series grade UD Ultra-Low Dispersion glass lens elements. Of course, price, size, weight and a reduced focal length range are the downsides of the 17-55 compared to the 17-85. Positioned above from left to right in their fully retracted positions are the following lenses Canon EF-S 18-55mm f/ IS II Lens Canon EF-S 15-85mm f/ IS USM Lens Canon EF-S 10-22mm f/ USM Lens Canon EF-S 18-135mm f/ IS Lens Canon EF-S 18-200mm f/ IS Lens Canon EF-S 55-250mm f/ IS Lens Canon EF-S 17-55mm f/ IS USM Lens The same lenses are shown below in their fully extended states with their lens hoods in place. With a fixed fast f/ aperture meaning the widest aperture opening is f/ through the entire focal length range - f/22 is the narrowest setting, exposure settings do not change when zooming in on a subject. To some, this is not a big deal - to me, this is a great feature. F/ is as fast as any Canon zoom lens currently made. It is fast enough to stop action in many indoor venues higher ISO settings typically required - fast action indoor sports may require f/2 or wider. This wide aperture also activates the higher autofocus sensitivity mode for certain focus points in many Canon bodies f/ does not have to be selected to get the benefit of this feature. F/ also presents a bright viewfinder to the user. Wide open, the 17-55 is able to produce a nicely blurred background. By employing a circular 7-blade aperture barrel, the Canon 17-55mm Lens produces a decent quality background blur even when stopped down. With a focal length range that is composed of relatively wide focal lengths, this lens needs a close subject to create a diffusely blurred background. Combining an f/ aperture with the 3 stop image stabilization, the Canon EF-S 17-55mm f/ IS USM Lens is arguably the most handholdable lens Canon currently makes. Image stabilization will allow a shot to be taken at a shutter speed up to 3 stops slower than without IS. Sorry, but IS will not stop subject motion. This IS version is tripod sensing to prevent feedback loops between the IS sensor and stabilizer motor vibrations. The manual recommends turning IS off when tripod-mounting the lens to save battery life or when panning panning mode IS is not available. Leave IS on when handholding or shooting from a monopod. The IS implementation on this lens is very well behaved - it is quiet and does not cause the image to jump when starting up. The three lenses compared above are from left to right, the Canon EF-S 17-55mm f/ IS USM Lens, Canon EF-S 17-85mm f/ IS USM Lens and Canon EF-S 18-55mm f/ IS Lens. All lenses are shown extended to their maximum lengths with their optional lens hoods attached. With Ring USM Ultrasonic Motor, the 17-55 IS focuses very quietly and very fast. Focus accuracy has been very good for me an even more important fact. Note that, while I did not notice an issue, some are reporting AF accuracy inconsistencies at infinity focus distance. FTM Full Time Manual focusing is a very nice feature of this lens. The focus ring is rather small, but turns easily. Likely to get far more use is the zoom ring - it is very nicely sized and turns smoothly with little effort. The AF and IS switches are recessed to prevent accidental changes. Canon claims that "By optimising Super Spectra lens coatings and lens element shaping, Canon’s engineers have been effective in suppressing flare and ghosting ­ more prone to occur with digital cameras due to reflection off the image sensor. By increasing light absorption, coatings reduce reflections off lens element surfaces to deliver crisp, undistorted images with natural colour balance." In reality, I am finding the 17-55 IS to be quite flare-prone if the sun or bright light is in the frame. Otherwise, color and contrast are excellent. Prior to receiving my 17-55 IS, I stated that I expected its image quality to match or nearly match that of Canon's L Series Lenses as it shares the L-Series UD lens elements. As it turns out, my 17-55 matches or exceeds the optical performance of my L-Series zooms in this similar focal length range ... This lens is sharp! Wide open and from edge to edge. Unless the distance is close that is - I'm finding that close subjects do not produce the same image sharpness as normal distance subjects. The ISO 12233 chart test results indicate this as well. The 17-55 IS shows slight sharpness improvement at f/4, but performance at f/ is very good. My Canon EF 16-35mm f/ USM Lens is slightly sharper in the center at 17mm wide open, but the 17-55 IS is sharper at all other tested focal lengths - and proved much sharper in the corners at all focal lengths and apertures. Distortion was also less on the 17-55. In my opinion, the only reasons to buy the 16-35 over the 17-55 are for full-frame compatibility a big reason, better build quality and environmental sealing EF-S compatible bodies are not weather sealed at this time. Similar story with the Canon EF 17-40mm f/4L USM Lens. The 17-55 IS is sharper at all other tested focal lengths - and proved much sharper in the corners at all focal lengths and apertures. At close distances, the 17-40 had sharper corners and held its sharpness to a narrower focal length than the 17-55. Lower barrel distortion at the wide end is also in the 17-55's favor. Full-frame compatibility, better build quality and environmental sealing are in the 17-40 L's favor. I suspect the wider price discrepancy between these two lenses will keep sales of the 17-40 L going stronger than for the 16-35. The Canon EF-S 17-85mm f/ IS USM Lens boasts a longer focal length range but lacks the fast aperture and is not as sharp especially in the corners as the 17-55 IS. The two lenses are rather close in center sharpness but most of the time my primary subject is not dead center in the frame. Once again, lower barrel distortion at the wide end is in the 17-55's favor. Price is also a differentiator between these lenses. The similarly-built Canon EF-S 10-22mm f/ USM Lens turned in similar optical results to the 17-55 IS in the short range of focal lengths that overlap. I see these lenses more as complementary than competing. At all overlapping focal lengths and apertures, the 17-55 is sharper than my Canon EF 24-70mm f/ USM Lens. The default image below is a 100% crop from the 17-55 IS at 55mm, f/ Mousing over the image will show a crop from the Canon EF-S 18-55mm f/ IS Lens at f/ wide open. Keep in mind that the 18-55 IS should have a DOF advantage, but you will see the 17-55 IS still performing better in the foreground and background. Also, the vehicle grill is the center of the frame - where the 18-55 IS competes best. However, this focal length is the weakest in the 18-55 IS's range. Some additional information about the above comparison ... This comparison was shot with a Canon EOS 40D. There was a 250-pixel-wide swath removed from the image as indicated by the white line. This allows a foreground object and some background to be present in the image to confirm focus accuracy. Images were shot as RAW and processed with the Neutral Picture Style 0 Contrast and sharpening = 1 very low - 2 would look noticeably sharper. Images were converted in DPP to 16-bit TIFF files, cropped in Photoshop and saved as 80 quality JPG files. The lighting was harsh mid-day sunlight on a clear day. A tripod was used - the shutter speed was 1/2000 for the f/ shot 1/500 for the f/ shot. In addition to being sharp, CA Chromatic Aberrations are very well controlled in the 17-55 IS. The following example is meant to show the difference in CA between an economy lens 18-55 IS again and a top quality zoom. This one was shot at 17mm/18mm and at f/ for both lenses. This 100% crop sample is located about 25% into the frame from the top left corner. Mousing over the image will show the 17-55mm IS advantage. Distortion is present over most of the 17-55mm focal length range. Mild barrel distortion is present until about 24mm where pincushion distortion becomes present through 55mm. Your spouse will appreciate how the 17-55 makes them look thinner at the longer focal lengths use this excuse if you need help getting spousal purchase permission. Being a wide aperture, wide angle lens, expect to see some vignetting from the 17-55 IS. The amount of vignetting is less than I anticipated - basically visible only in the corners at f/ when photographing an even-colored subject such as a blue sky. One of the benefits of using an EF lens on a body is that much of the lens vignetting is not apparent within the cropped field of view. Click on the image below to compare the Canon EF-S 17-55mm f/ IS USM Lens to other lens models with and without hoods opens in new window to save your place in this review. The 17-55 passes distance information to the camera body for use in E-TTL II exposure determination. Most new Canon lenses have included this feature. The Canon EF-S 17-55mm f/ IS USM Lens is a middle weight at oz 645g. At x x the 17-55mm IS becomes the largest EF-S lens to date. It is, however, a very nice size/weight to carry around and balances well on compatible camera bodies. To put size into perspective, the above size comparison photo includes from left to right the Canon EF 17-40mm f/4L USM Lens, Canon EF 24-105mm f/4L IS USM Lens, Canon EF-S 17-55mm f/ IS USM Lens and Canon EF 24-70mm f/ USM Lens. The same lenses are show fully extended below. Similar to many of the L-Series zooms, the 17-55 IS features a 77mm filter thread. A feature appreciated by circular polarizer filter users is the non-rotating front element does not rotate with focusing or focal length change. The 17-55 extends with focal length increase, but does not extend with focusing. With a relatively-long-for-its-focal-length-range closest focusing distance of the 17-55 IS yields a meager maximum magnification of at 55mm. As usual, extension tubes can increase the magnification ability significantly. With the Canon EF 12mm Extension Tube II, magnification is With the Canon EF 25mm Extension Tube II, magnification is Canon's spec. As this is an EF-S lens, version II of Canon's Extension Tubes are required. The 17-55 is not compatible with Canon's Extenders. The 17-55 IS shares design and build qualities with Canon's other recently-released EF-S Lenses - especially the Canon EF-S 10-22mm f/ USM Lens. It is nicely designed and well thought out, though I don't prefer the rear-positioning of the manual focus ring that is where I generally grip the lens. The 17-55 IS is not as elegant in design and function as the L-Series zooms, but it is very good in this regard. Not real important but missing is the Canon date code. I'm not sure why Canon did not go all the way and make the 17-55 IS an L-Series lens. An upgraded metal lens barrel seems to be the missing component - and the red ring. Also, the accessories included with L-Series lenses are missing - the Lens Pouch LP1219 and 17-55 IS-exclusive Lens Hood EW-83J are optional. Since Canon has an L-Series lens on the PowerShot Pro 1, making a non-"EF" L lens is apparently not outside of their definition. This lens certainly has the image quality to be an "L". With the help of a 12mm Extension Tube, you can physically mount this lens on a full frame body. But you probably will not want to. The image above shows the image circle as seen through this combination by a Canon EOS-1Ds Mark III. In addition to the heavy vignetting, AF does not work and the aperture information does not report to the camera. Even in MF mode, more hurdles remain - at 55mm, the 17-55 will not focus any farther away than about 7" or so in front of the lens. This distance rapidly decreases as the focal length is widened until the subject is against the glass and beyond this point no subject can be in-focus. It was a fun exercise at least - and now we know. I am getting some email asking about dust issues with this lens. Some are seeing a noticeable amount of dust collect under the front element. Dust seldom makes a noticeable difference in image quality - No one has indicated to me that their dust has affected the image quality of their 17-55. But it is not normal for this amount of dust to accumulate inside the lens. My 17-55 came with one small speck of dust in it a genuine Canon factory dust speck I suppose and has not accumulated any additional dust. I've shot thousands of mostly outdoor pictures with this lens. Weddings, events, parties, family activities, portraits, landscapes, stage shows, car shows, night sky ... there are far more uses for this lens than I am going to think of. Unless there is an upgrade to a or full frame body in your future, the Canon EF-S 17-55mm f/ IS USM Lens is an ideal lens to include in your kit. Even if a larger format sensor body is in your future, the resale value of this lens remains strong. With the introduction of the 17-55 IS, Canon displays its commitment to the EF-S line of lenses. With the huge base of Canon EF-S Digital SLR users, the 17-55 IS, with its excellent features, specs and image quality, will find a home in many professional and amateur photographers' kits. This is the lens I keep mounted on my body currently a 50D - I highly recommend it. Bringing you this site is my full-time job typically 60-80 hours per week. Thus, I depend solely on the commissions received from you using the links on this site to make any purchase. I am grateful for your support! - Bryan My Recommended Canon EF-S 17-55mm f/ IS USM Lens Retailers Rent the Canon EF-S 17-55mm f/ IS USM Lens The Tip Jar More Canon EF-S 17-55mm f/ IS USM Lens Related Information Chợ Tốt Điện Tử - Kênh mua bán lens Canon 50mm giá rẻ mới nhất 06/2023 Lens Canon 50mm F/ STM là ống kính gắn ngoài được Canon cho ra mắt vào năm 2015 để thay thế cho dòng lens Canon 50mm F/ II, sản phẩm này đã nhận được nhiều đánh giá tích cực của người dùng trong phân khúc phổ thông. Nếu bạn là người muốn tập tành chụp choẹt và chơi ảnh thì đây là sản phẩm rất nên sở hữu. Những đánh giá tích cực về ống lens Canon 50mm F/ STM Canon là một thương hiệu không còn xa lạ gì với đông đảo thế hệ người tiêu dùng tại Việt Nam, với rất nhiều sản phẩm máy ảnh chất lượng cao và có độ bền bỉ đáng kinh ngạc. Bên cạnh đó, các thiết bị phụ trợ cho máy ảnh của Canon cũng có chất lượng tốt và được nhiều người tiêu dùng đánh giá cao, các loại ống lens của Canon chính là một trong số đó. Trong phân khúc phổ thông dành cho số đông người tiêu dùng, Canon có sản phẩm lens Canon 50mm F/ ii từng tạo được làn sóng quan tâm trên toàn thế giới. Thậm chí trên các diễn đàn dành cho dân đam mê nhiếp ảnh vào giai đoạn 2009 2010 còn có hẳn các topic chia sẻ những hình ảnh được gửi đến từ khắp nơi trên thế giới của những người đang sử dụng ống lens này. Tuy nhiên sau một thời gian, dòng lens này lại nhận được khá nhiều lời than phiền về chất lượng hoàn thiện Sử dụng chất liệu nhựa nhìn ọp ẹp và độ bền không cao, dễ hư hỏng khi có tác động bất ngờ, Tiếp thu những phản hồi đó, sản phẩm ống lens Canon 50mm F/ STM đã được ra mắt vào tháng 5 năm 2015 và đã nhận được rất nhiều đánh giá tích cực Tuy vẫn sử dụng nguyên liệu chính là nhựa nhưng lens Canon 50mm F/ STM hoàn thiện cứng cáp hơn, bổ sung ngàm kim loại chắc chắn nên khi sử dụng hạn chế được những hư hỏng ngoài ý muốn tốt hơn hẳn so với người tiền nhiệm. Bổ sung hệ thống lấy nét mới cho tốc độ lấy nét nhanh hơn, căn nét chuẩn hơn và có thể lấy nét liên tục khi quay video mà không phát ra những âm thanh rọt rẹt khó chịu như trên Canon 50mm F/ ii. Bổ sung một lớp Coating giúp chống lóa hiệu quả hơn, điều này đặc biệt hữu ích khi sử dụng trong những điều kiện có ánh sáng mạnh, nó giúp cân bằng trắng tốt hơn khiến ảnh không bị nhiễu sáng và lóa dân chơi ảnh thường gọi là hiệu ứng bóng ma. Khoảng cách lấy nét tối thiểu của lens Canon 50mm F/ STM là 35cm, trong khi của Canon 55mm F/ ii là 45cm, điều ngày có nghĩa người dùng sẽ có thể săn ảnh Macro với hiệu ứng Bokeh hiệu quả hơn người tiền nhiệm khá nhiều. Với tiêu cự 55mm và khẩu độ F/ ống lens này đem đến khả năng chụp ảnh chân dung rất tốt và hiệu ứng xóa phông đẹp mắt. Bên cạnh đó, khẩu độ lớn sẽ có khả năng phơi sáng lâu, tạo độ sâu trường ảnh tốt, giúp những tấm ảnh chụp đêm hoặc trong điều kiện thiếu sáng trở nên chất lượng hơn. Lens Canon 50mm F/ có thiết kế đẹp, mỏng hơn so với người tiền nhiệm 3,9cm so với 4,1cm và phù hợp với nhiều định dạng máy từ full-frame đến Crop, giúp người dùng dễ dàng sử dụng trong nhiều trường hợp. Có nên mua lens Canon 50mm F/ STM thời điểm này? Nếu bạn là người chuyên hoạt động trong lĩnh vực nhiếp ảnh thì câu trả lời là không, vì dòng lens này không phải trợ thủ lý tưởng dành cho các nhiếp ảnh gia chuyên nghiệp. Tuy nhiên, nếu bạn chỉ là một người bình thường có sở thích chụp ảnh để lưu lại những khoảnh khắc đẹp làm kỷ niệm thì rất nên mua con lens Canon 50mm F/ STM này, vì những lý do sau Rất nhiều ưu điểm nói trên của Canon 50mm F/ STM giúp nó đáp ứng rất tốt cho nhu cầu chụp ảnh thông thường của tất cả người dùng. Sau khi nâng cấp, độ bền của sản phẩm đã được cải thiện rất nhiều so với người tiền nhiệm, nên người dùng có thể yên tâm để sử dụng mà không phải quá lo lắng sẽ gặp phải những hư hỏng ngoài ý muốn. Nếu bạn chịu khó tìm tòi trong quá trình sử dụng, con lens Canon này sẽ đem đến cho bạn khá nhiều bất ngờ thú vị. Hiệu ứng cánh sao 14 cánh khi chụp ánh đèn chính là 1 trong những bất ngờ thú vị đang chờ bạn khám phá. Và lý do cuối cùng, cũng là lý do chính đáng nhất dành cho nhiều người, đó là mức giá của con lens này rất hợp lý và bất kỳ ai cũng có thể sở hữu được nó mà không cần phải quá lăn tăn về hầu bao của mình. Thông số kỹ thuật của lens Canon 50mm F/ Loa chụp ống kính ES-68 Nắp ống kính E-49 Ống mở rộng EF12 II Optional 0,45 0,24X Ống mở rộng EF25 II Optional 0,74 0,53X Cấu trúc nhân tố nhóm 5-6 Góc ngắm theo chiều dọc 40 Góc ngắm theo chiều ngang 27 Góc ngắm theo đường chéo 46 Hệ thống chụp STM Khoảng cách lấy nét gần nhất m/ft 0,35 /1,15 Khẩu độ tối thiểu 22 Kích thước bộ lọc mm 49 Số lượng màng điapham 7 Trọng lượng g xấp xỉ 160 Tỉ lệ khoảng cách - Đường kính x Chiều dài mm tối đa 69,2 x 39,3 Độ phóng đại tối đa x 0,21 Lens Canon 55mm F/ STM hiện có giá bao nhiêu? Tất cả những thông tin ở trên đã giúp bạn quyết định tìm mua lens Canon 55mm F/ STM ngay bây giờ chưa? Nếu câu trả lời là có, hãy tham khảo ngay mức giá bán lens Canon 50mm F/ đã được chúng tôi tổng hợp từ nhiều địa điểm đang kinh doanh sản phẩm này trên khắp cả nước như sau Giá Lens Canon 50mm F/ STM Giá thấp nhất Giá cao nhất Lens Canon 50mm F/ STM Shopee 2,699,000 2,900,000 Lens Canon 50mm F/ STM Lazada 2,488,000 2,690,000 Lens Canon 50mm F/ STM Mayanh24h 2,249,000 4,490,000 Lens Canon 50mm F/ STM Tiki 2,690,000 2,690,000 Lens Canon 50mm F/ Chợ Tốt 1,100,000 2,100,000 Nhìn vào bảng giá bán lens Canon 50mm F/ ở trên, chúng ta có thể thấy rằng sản phẩm này có biên độ giá dao động không quá lớn, và thường nằm trong khoảng giá dưới 3 triệu. Ở những nơi rao bán giá cao hơn đều có kèm theo ngàm chuyển EF EOS M hoặc body máy, giúp bạn tiện lợi hơn cho 1 lần mua sắm. Mua bán lens Canon 50mm F/ STM tại Chợ Tốt Điện Tử Nếu bạn muốn mua lens, tại Chợ Tốt Điện tử hiện đang có nhiều thông tin rao bán Canon 50mm F/ STM với mức giá rất hợp lý để bạn lựa chọn. Nếu bạn đang sở hữu một con lens Canon 50mm F/ STM cũ và muốn bán lại, hãy chụp ảnh sản phẩm kèm thông tin mô tả và thông tin liên hệ để đăng tải lên Chợ Tốt Điện tử. Sau một vài thao tác đơn giản, tin rao bán của bạn đã có thể tiếp cận với hàng triệu khách hàng có nhu cầu trên toàn quốc,giúp dễ dàng chốt đơn. Chợ Tốt Điện tử - Địa chỉ hỗ trợ hiệu quả nhất khi cần mua bán lens Canon 50mm F/ STM nói riêng và tất cả các sản phẩm điện tử nói chung. Skip to contentTrang chủỐng kính Canon RF 70-200mm f/ IS USM

canon 40 f2 8 cũ