Canon EF50MM F/1.8 STM Lens for Canon DSLR Cameras

The Canon EF 50mm ƒ/1.8 STM is the third lens in the 50mm line for Canon, the original having been released in 1987 and updated in version II in 1990. Twenty-five years later, the lens has been overhauled with the new STM focusing system and a new look, but otherwise the optical design is unchanged.The lens was designed to fit the EF (35mm) mount, and will also work on the EF-S mount for 1.6x cropped sensor bodies, as well as Canon's existing APS-H (1.3x crop) bodies. On these bodies the equivalent field of view is 80mm and 65mm respectively.The lens is available now for approximately 8kSharpnessUsed wide open at ƒ/1.8 or ƒ/2, the lens exhibits substantial corner softness. On a sub-frame camera like the 7D it's not quite as noticeable as on a full-frame camera like the 1Ds mkIII, because the sensor doesn't capture the entire field of view offered by the lens. Either way, at ƒ/1.8 there's only a small area of sharpness in the center of the frame, which quickly gives way to softness going out towards the corners.Stopping down to ƒ/2.8 improves sharpness dramatically: on the sub-frame 7D, images produced are almost tack-sharp corner to corner, with a light amount of softness in the extreme corners; however, on the full-frame 1Ds mkIII there is still some corner softness to contend with. It's not until ƒ/4 that we see true corner-to-corner sharpness, which improves negligibly as the lens is stopped down to ƒ/8.Diffraction limiting sets in at ƒ/11, but you won't see any practical impact on sharpness until ƒ/16 and ƒ/22.Chromatic AberrationThe Canon EF 50mm ƒ/1.8 STM is very resistant to chromatic aberration: there is a slight amount present when the lens is used at its widest apertures, but as it is stopped down it is less prominent.Shading (''Vignetting'')With the Canon EF 50mm ƒ/1.8 STM mounted on the sub-frame 7D, there is a slight amount (1/3EV) of corner shading that disappears as the lens is stopped down past ƒ/2.When mounted on the full-frame 1Ds mkIII, the lens produces some impressive corner shading when used at ƒ/1.8 or ƒ/2 - the extreme corners are one and a quarter stops darker than the center. Stopped down to ƒ/2.8, this corner shading becomes just a half-stop differential, and at ƒ/4 and smaller, corner shading becomes negligible.DistortionThe Canon EF 50mm ƒ/1.8 STM produces images with a small amount of barrel distortion, less noticeable on the 7D than on the 1Ds mkIII: on the latter camera, images show +0.5% distortion in the corners. This is easily correctable in post-processing.Autofocus OperationThe Canon EF 50mm ƒ/1.8 STM employs an autofocus system called a "Stepping Motor", which allows the lens to provide smooth and quiet autofocus operation -- particularly beneficial during video capture. The lens took around a second to focus from infinity to close-focus. It offers full-time manual operation by just turning the focus ring after autofocusing. Attached 49mm filters will not rotate during focus operations, making life easier for polarizer users.MacroThe lens' minimum close-focusing distance is just over thirteen inches, and at this minimum distance it provides a magnification of 0.21x - not great for macro work, but not terrible, either.Build Quality and HandlingAt just over five ounces, the new 50mm ƒ/1.8 STM is actually slightly heavier than the 50mm ƒ/1.8 II, which weighed an ounce less. The new lens sports a satin black finish, and uses a metal mount to attach it to the camera, however it uses 49mm filter threads instead of the more common 52mm size. The lens is devoid of any ornamentation other than its identification badge - there is no distance scale or depth-of-field markings. There's only one control switch on the lens, to enable or disable autofocus. The diaphragm is made up of seven curved aperture blades, compared to the previous version's five, which should make for more pleasing bokeh results.

Very good build quality, appearance, small in size also easy to use, sharpness is very good with my 200d ii and clicks a very good quality images in both low light and day light, since it can go upto f1.8 a large aperture ISO always stays minimum and also get enough shutter to click a sharp images, to click long exposure you may need a nd filter in day light,Since it is a full frame lens, while using it on my canon 200d ii which has a APS-C sensor of crop factor of 1.6 the lens act as an 80mm (50×1.6), i need to go little lot further to click a photo of group of people.Also the STM focus is very fast in proper light conditions if there is over exposure or underexposed area the auto fucus may struggle since lots of light or no light to focus on or it can't determine where to focus,Even for moving subject the focus is fast and captures correctly on eye or whatever you intend under f1.8Last thing is this is a great purchase, now I'm not sure I'll use my kit lenses(18-55 & 55-250mm) again or notfor more information you can visit my !nstagramanwesh_photography

HIGHLIGHTS: excellent image quality, compact form factor and affordable pricing, but with few concessions in build and AF performance.CONSTRUCTION: Slightly smaller and heavier than the prior model, EF 50 1.8 II, aka nifty-fifty, but with significantly better build quality. Improvements include metal mount, sturdier barrel and AF/MF switch, larger focus ring, grippy matte finish and stepping motor (STM). Unfortunately, it has an odd filter size, 49mm, rather than 52 or 58mm common to small Canon lenses.OPTICAL QUALITY: It's the same optical formula as the nifty-fifty, but with tweaks to lens coatings and improved close focus ability. Wide open it's tack sharp center frame, sharper than my nifty-fifty. Corners on full frame, e.g., 6D, are darker and softer than center but equalize by F2.8. On APS-C cameras, e.g., 70D and Rebel, there is little corner darkening or softness since nearly half the image circle is cropped out. Optimal sharpness is at F5.6. Chromatic aberration (CA) is mild and reduced over the nifty-fifty. In short, image quality is excellent open wide, even better stopped down and one ups the nifty-fifty in both sharpness and control of CA.BOKEH: I love the soft whirl of a defocused background, and this seven-blade diaphragm does not disappoint, rendering smooth bokeh and pleasantly round specular highlights. The smooth bokeh combined with pin sharp center frame really make subjects pop at larger apertures. This a great portrait lens!AUTO FOCUS speed and reliability is markedly better than the nifty-fifty. It's accurate and rarely misses focus even in low light. Focus is achieved by front element extension (nested barrel. The STM motor is quieter than the prior model, albeit not completely silent.VIDEO FOCUS on a 70D is not as fast as STM zooms but buttery smooth and great for touchscreen pulls and Movie Servo. Focus noise, while low volume, was recorded by my 70D's built-in mic during quiet video clips. The workaround is to use an external mic or prefocus.MANUAL FOCUS is focus-by-wire: the ring merely activates the focus motor and is not mechanically coupled to the lens. Manual focus is smooth, but control isn't as good as a mechanical ring. The MF ring is thin but wider than the nifty-fifty's ring and better positioned. Like USM lenses, it has Full-Time Manual (FTM), allowing AF override without flipping a switch: simply turn the MF ring. Unlike USM lenses, FTM is only active when the shutter button is half-depressed.HOOD: The groove on the barrel is for the Canon ES-68, locking bayonet hood. It attaches to the outer barrel, protecting the protruding inner barrel from frontal impact and flare. It's pricy but a worthwhile investment. Update (8/16/2015): The JJC LH-68, a clone of the ES-68, is now available at less than half the cost of OEM.FINAL BLURB: The natural perspective and fast aperture make the EF 50 1.8 STM ideal for low light, travel and street photography with a full frame camera (6D). On a cropper, e.g., Rebel or 70D, it's a short telephoto and perfect for portraits, indoor sports and stage. Canon got everything right with this redesign: accurate and snappy AF, sturdy build and, most significantly, vivid and sharp images wide open.And Get 10% Casshback in Amazon pay wallet by Ordering through wplov.in/4.