Canon 6310B002 EF 40mm f/2.8 STM Lens

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Canon 6310B002 EF 40mm f/2.8 STM Lens

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A unique and indispensable addition to Canon's series of EF lenses, the 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. The EF 40mm f/2.8 STM's unobtrusive design helps the photographer avoid overwhelming their subjects with a large lens and to remain discreet in sensitive shooting situations with no compromise in performance. Features such as a newly developed stepping motor complement its diminutive design for smooth and quiet continuous AF while capturing video with the Canon EF 40mm Lens, 6310B002, a circular aperture (7 blades) for beautiful soft-focus backgrounds, and a short minimum focusing distance of only 0.98'.

About This Item

  • Ultra-slim and lightweight design
  • Advanced lens configuration delivers high image quality from the center to the periphery
  • Aspherical element
  • Customer Reviews
    4.6 out of 5 Stars
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    1-10 of 40 reviews

    Stays on my 6D for days on end

    It's a lens that brings terrific detail for the price, and pretty much shoots what you see as you see it. It's a "Here's what I saw" lens. I take it off the camera only to get close-ups of birds in trees, and would to take close-ups of grizzly bears too, unless one were to surprise me close-up. Street shots, portraits, close-ups, macros with DOF (versus the deep bokeh effect), all work so well. I'll try to upload a gosling shot to show what happens when you get within a foot of the subject, the type of background created, which will lend itself to depth of field and location -- so watch your background carefully -- you'll want it included, and it will be. I'll also try to upload a nighttime cityscape of Charles River bridges, to show how it acts as a wide-angle. On the landscape shots, watch and allow for your curved edges -- it's not flat glass. For months now, this has stopped my shopping or dreaming of any other lenses as I become the best 40mm pancake photographer I can be. I'm sure next year, I will be onto tripods and superzooms, but right now, I am have a syrupy blast with this pancake.

    Not One Thing Wrong With It

    The Canon EF 40mm f/2.8 STM pancake lens is fantastic! I appreciate the low profile, and the high build quality. The STM autofocusing is good, being rather quiet, but searches a little bit more than my newer nano USM lenses. I have found that this lens is good for shooting video from a tripod, but tends to lack a little bit when shooting handheld. Partially due to the lack of Image Stabilization, but mostly just because the focal length isn't the greatest for keeping waverless video. Being one that does photography purely as a poorly-funded hobbyist, I see tremendous value in how fast this lens is, along with the high image quality, especially for the price. Being a EF lens (which it's little sister the 24mm 2.8 STM pancake is not) also adds value, but since I shoot with only crop sensor bodies, that fact isn't as compelling. There's really only one reason that I knock it back to 4 out of 5 stars, and that is because it is not as valuable of a lens for me as my 50mm 1.8 STM nifty fifty. The focal lengths are so similar. Both being STM (while not silent) are good enough for video especially if using shotgun or lavalier mics. The lower profile of the 40 is helpful, but not incredibly more desirable than the size of the 50mm. The biggest difference is the extra 2 stops of light that the nifty fifty offers. It costing roughly 70% less than the 40mm is a bonus. I've found that the EF 40mm f/2.8 STM spends most of its time on the kids' Rebel T3 as they begin to learn photography. My take: Unless you are buying this pancake lens for the pancake aspect of it, get the latest nifty fifty from Canon instead.

    Excellent Sharp Pancake

    I really like so many things about this lens so lets get in to it. First the size is a GREAT answer to mirrorles systems. Second the Optics are very sharp even wide open just slghtly soft at extreem edges wide open. Third the color out put is really nice not muted. Forth the build quality is incredible for such a cost and that is the fith consideration the inexpensive price. I am using my copy on a 5Dmk3 and I love it. I am having issues with non Canon lenses AF on my 5Dmk3. But not with this Pancake 100mm f2.8L and 70-200 f2.8L ii. to put it simpler tjherms I get all the resolution of the 5Dmk3 with this lens and my other two all the time, completing my system for now till I get a 18-135 STM and T4i for video. finailly Canon is catching up with the High Megapixel sensors in optics. Check the MTF charts. if you might be considering a undercover looking lens or compact size don't hesitate get your copy now. Despite having two 430ex ii I decided to get a 270ex ii because of it's compact size to use as IS and it's a lovely combination. The AF is not slow on this lens, just not as fast as my other two!


    I bought this as a travel lens for my T2i. Something that is not only lighter, but smaller. At first I did not like it. It simply wasn't as fun as my 85mm or 35mm lenses. The focus ring is kind of fiddly since it is focus by wire. Meaning it does not mechanically focus the lens. It sends a signal to the same motor the AF uses. Then I upgraded to a 760D/T6s. The lens behaves much better with the newer camera. The AF is better behaved, and manual focus while in AF mode works much better. I've also gotten more into using the AF with the 760D, since it has more flexible and powerful AF modes. This lens really works better if you leave the focus up to the camera and instead worry about the other settings like aperture and shutter. The colors and detail are very good. I get some CA on branches shot against bright skys and such. But even some L glass does that.

    A bit of a let down

    I bought this lens for its weight, size and price. Based on the reviews,it seemed quite good, but using it is a bit of a let down. It is certainly small and light, but the autofocus problem for the models sold with the first firmware is indeed annoying and it is present even when used with a Canon EOS3. Even more annoying is that to install the firmware upgrade one MUST use either a 1Dx, or a 5DIII equipped with latest firware upgrade, or a 650D (which is being recalled for other reasons). This means that one has to go to Canon to do it. But even once upgraded the lens remains pretty flat in terms of performance . Yes, the autofocus is fast, but the focus is soft, color rendition is flat and bokeh is basically non existing. So overall, I would say the price is not that good, because you get exactly what you pay for.

    Best Full-frame focal length and lens size

    I am soooo happy canon made this lens. It really is the PERFECT focal length and size all in one camera. This lens will absolutely put the fun back into your photography days. To say the least, 40mm on a full frame is not too sweet, not too sour, but just right. EVERYTIME! It's size and PRICE allows you to tote it around and ENJOY yourself. Thank you god! Geez. I've been waiting a looonnnggg time for something like this. Canon.... please develop the 40mm focal length more. And please develop pancake lenses more. Pancake lenses are the future for anyone who wants to enjoy their DSLR. I can now carry my 6D everywhere and carry my children when I need to. It is 10x more easier to carry around than the 50mm f1.4. THAT is saying quite a lot.

    Lightweight and Sharp

    I purchased a camera kit, which naturally came with a zoom lens. I wanted something lightweight, suitable for walking around taking pictures at the beach, at cookout, etc. I never fully understood why people would purchase a standard lens when a zoom could cover the focal length of multiple standard lenses. The reason is performance. I was immediately impressed by how sharp the images are with this lens. It has a short focal length, but without any wide angle or fish-eye effect. Colors are vivid. Bokeh is great on subjects close to the camera/lens, about 3-9 feet. This lens is a great value. The price/performance ratio is off the charts. This is a must have for full frame or APS-C cameras.

    The Sleeper of Sleepers !

    One of the sharpest lenses I've ever used, a great match for full frame (and all) sensors. I do mostly travel and landscapes. I love the 40mm coverage on full-frame, and the 60mm equivalent on APS-C. I use a cheap rubber screw-on shade, so that if I bump it, the lens won't be damaged. But I've had misfocuses and balkiness, so that I have to shut off the 5D2 and turn it back on. This does not inspire confidence for weddings or street shooting. My old EF 35mm f2 is more trustworthy for those purposes. My suggestion, Canon, re-issue this otherwise great 40mm lens and get it right this time. My EF-S 24mm f2.8 is also new STM technology and does not seem to have these issues.

    Everyone should have this in their camera bag

    Everyone should have this in their bag. In the "old days" of film, the standard prime was either a 35mm or 50mm, with photographers using one or the other for their slight respective advantages. This 40mm is right in the middle! It is tiny, weighs almost nothing. Even though not a metal "L" lens, this has an solid overall build and feel (perhaps because of its compact size) and has a "as your eye sees" field of view. I've used this on several photo shoots so far in place of my 24-70mmL 2.8 (as a test) and am very pleased with the results. Several times of course I wished for a little wider or closer, but often I could compensate by simply moving closer or farther away. (Not always possible in all situations of course, I understand.) I could see no difference so far with the 24-70, in terms sharpness or focusing speed or target acquisition. The STM (versus USM) focus motor is quick and quiet, and I did not notice any noise (not to say it wasn't there, but it wasn't noticeable.) This lens is extremely inexpensive, and the size and weight are insignificant, and even if you didn't replace a lens in your bag, this would add almost no bulk or weight to it. (You could put it in your shirt pocket!) I was able to handhold at 1/20th with the mirror-up setting on my 5DIII and got crisp, sharp photos using just a street lamp for lighting. Very glad I added this to my lens options.

    In love

    I recently purchased the new 70 D body, I am never that fond of kit lenses so this is the first lens I decided to purchase to go with my new camera. I am in love with this lens. It is such a fun lens, it really captures the colors of the scene you are shooting well, and for the price the quality of the photos are great! If you are a intermediate photographer like me I know you will not be disappointed! This was actually my first stationary lens, I usually shoot everything with a wide angle zoom or a regular telephoto zoom, this lens has made me so excited to purchase another stationary lens. I see the 85 mm in my future:)
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