Possibly the most overlooked lens in the Canon lineup, this lens really surprised me. It has a lot to offer for its price, and I want to go over the reasons why I would recommend it. As with all WOFG reviews, I will go over the pros and cons, offer advice for how to use the lens, and even give recommendations for other lenses at the end that might work just as well for you.First the pros (So many!).1. Good IQ – This lens has much better IQ than I was expecting. Most the time inexpensive telephotos don’t offer a lot of clarity, but this one does. At the low end, we have lenses like the EF 75-300mm F4-5.6 USM, or the EF-S 55-250mm F4-5.6 IS ii. Those are both lenses that likely came with your camera. The 70-300mm IS II kills both those lenses in image quality, as well as overall performance. It even features a single UD element, just like L lenses have, to increase sharpness and reduce aberrations. I will let the images do the rest of the talking here.2. Nano-USM – There are only 2 lenses in the Canon line up that feature this amazing focusing system, this one and the 18-135mm. Canon claims it is fast for stills but silent like STM for video. I was skeptical, until I had both lenses to try. They deliver. I use this lens to shoot sports like baseball, and not one time did it fail to find focus where it wasn’t just user error. Very fast, I would say almost indistinguishable from my 70-200mm F2.8 for speed of AF. I don’t do a lot of video, but I tested this feature too. Could not pick up any noise while focusing, even when shifting from near objects to far. This is a great feature that Canon has created, and they really need to start adding it to other lenses. Keep in mind that the base models like the T6 or T7 do not support silent focus in video, so if that is your intent then it might be a better idea to invest in a better camera body first.3. Good reach – 70-300mm is a pretty good reach for things like outdoor sports, as well as small wildlife (squirrels and bugs). Most the shots I take are between 100-200mm, so I rarely use the full reach, but it is nice to know it is there. I shoot typically with a 70-200mm F2.8, but when I go to places like the zoo it just can’t reach far enough and is also quite heavy. The 70-300mm not only gives me that reach, but is pretty lightweight. I would also add that if you want to use this as a nature lens for insects or even flowers, than invest in some extension tubes. The min focus distance of this lens is about 4ft (1.2m), which makes it tough to get close to the little things for those high detail shots. A set of tubes will help you cover that gap (I use the Kenko set). Also worth pointing out, if you put this on an APS-C/crop camera then it becomes a 112-480mm lens. That is pretty massive for a lens that doesn’t even cost 500 bucks!4. Not too heavy – Speaking of the weight, for a long telephoto lens this one is not too heavy. I really like that, since after a few hours of carrying my 70-200mm it can make me want for something lighter. This is very appealing to those that will be carrying it all day long.5. IS – On a longer lens like this image stabilization becomes more necessary. When shooting at 300mm, to avoid handshake issues you need to be shooting at 1/320 sec on a full frame camera, and 1/500 sec on a crop. This lens has 4 stop IS, so you can shoot as slow as 1/20 sec on a full frame, or 1/30 sec on a crop and still achieve sharp focus. This is a HUGE advantage for nature shooting, something this lens will be good at. However, for sports, this is not as useful. IS does nothing for a moving subject, you need to shoot at faster shutter speeds to do that. Most the time I was shooting at 1/500 sec. At those speeds IS not only is no longer needed, but also can be a hindrance due to the time it takes for the motor to kick in. If shooting sports or moving subjects at 1/500 sec or faster, you are best to turn IS off, lest you might miss a shot while the drive kicks in.6. Digital focus window – This feature is an odd one, and while it isn’t entirely useful I am including it as a pro. There is a small digital display on the lens that has three separate modes (which are changed by the mode button on the side). One tells you how much the IS is compensating, which if looking into the viewfinder is useless since you can’t see it. In live view it is still mostly useless, maybe video shooters find it useful, but I doubt it. It also can display the focal length, which is nice if you use a crop camera as it actually displays the cropped FL. This is still not very useful though, as I would imagine that you are just going to zoom to what you need regardless of the exact FL. So why is it a pro? Well, because it also can display your focus distance, which is usually not a feature that is seen on lenses like this. It makes it so you can see that you are focused to infinity or at the min focus distance. This is very useful to people that are nature shooters, landscape shooters, and even macro shooters. I leave mine on this setting all the time. So while it might not be the most useful feature, it is nice that it has it.7. Compatible with all EOS cameras – As an EF lens, this can be mounted on a full frame or an APS-C “crop” camera. To break this down, it can mount on the 1D, 6D, and 5D for full frame cameras. For crop cameras it will work on all the Rebel models, mid-range models like the 77D or 80D (or older), and the 7D. It can also be used on the mirrorless Canon models if you have the EF EOS M adaptor, which I strongly suggest getting if you are picking up an M50 or other mirrorless. (If bought with the camera it is 50 dollars, otherwise it is 200.) The EOS system is fully backwards compatible too, so even film cameras as old as the original ones released in 1987 can mount this lens.8. Price – At the time I am writing this, the lens is available for 450 USD, though it typically is 550. At this price this lens is hard to pass up, especially if all you have is the lens that came with your camera. For full frame users (6D, 5D, 1D) it is one of the only telephoto options available for less than 1000 USD, and in my opinion is the best at that price point. For crop users, there is also the EF-S 55-250mm F4-5.5 IS STM, which I will be talking about later in the review. Keep in mind there is an older version of the 70-300mm, and the latest version corrects a lot of the issues that lens had. They are both very similar in price, so I really don’t suggest the older lens.9. Other stuff – Full time manual focus (can manually focus even in auto), pleasing design (looks good), solid feel even though it is plastic (not likely to break), 9 blade aperture for pleasing background elements, Smooth zoom ring, zoom ring lock for storage, good price to quality ratio.Cons – Most this info is for your information and is also listed in the specs of the lens. If I removed stars I will note why, otherwise it was not worth the removal of a star.1. Limited Aperture – This is to be expected from a lens in this price range. The max aperture is a variable F4-5.6, which means that it loses more light as it zooms in. It is not ideal for indoor sports as it just doesn’t allow enough light, not to mention it really can’t utilize its full zoom range anyway (especially on a crop camera). But if shooting outdoors in good sunlight, this will not be a problem. This is why I use it for things like baseball. If shooting at non-moving subjects though, the IS more than makes up for the lack of a wide aperture, but the overall reach and long min focus distance still make it tough to use inside. I would stick to outdoor use.2. Not as sharp as higher models – While the lens does get some impressive clarity, this is also considering the price of the lens. There is a noticeable difference when compared to the L series 70-300mm or the 70-200mm models, or even third party options like the Tamron 70-200mm G2. But all those lenses are significantly more expensive than the IS II, and even though they are optically superior, for its price this lens will be more than adequate for lower level shooters. The expensive stuff should be left for people that get paid to take photos, or are at least very serious about the hobby. For those that just want a good lens that won’t break the bank, this is a good place to start.3. Rear element sticks out – Weird thing to notice, but the rear lens element really sticks out the back of the lens. It makes me worry that it will get scratched at some point since the rear never has the protective coating the front element has. I often don’t put the caps on my lenses when I am out shooting to speed up lens swaps. For this lens, I always use the rear cap. It is kind of ridiculous how far it sticks out.4. Focus Ring is touchy – When holding the lens I found that I sometimes would accidentally hit the focus ring, which caused the focus to become spastic. It is very easy to accidentally do this. I have since acquired the lens hood and instead balance the lens by holding that instead.5. Focus by Wire – For those that do not know what that is, it means that there is no mechanical connection to the focusing mechanism. So when you focus manually there is an electronic signal that tells the lens to move in “steps”. It is not as precise as mechanical focus. For most people this will never matter; if you don’t use manual often or if you never do super close up shots then it is a wash. If you do, then it is still usable, it just takes a little more finagling. I list this as a con since I don’t know even one person that prefers focus by wire over mechanical focus, but it otherwise is not a big deal for most people. Another thing to point out, focus by wire requires power to focus even manually. So if you are adding extension tubes or doing some kind of unusual set up, be sure that power can still be supplied to the lens or you won’t be able to focus at all.6. Barrel Extends as you zoom – Another thing that should be expected on a lens like this is that the barrel extends out as you zoom. It makes the lens longer, and probably makes it a little more likely dust will get into it. I have not had issue with it, but I have not had it long either. I highly recommend retracting the lens when it is not in use and using the lock to keep it from creeping out on its own.7. Other stuff – No lens hood is included (a lens at this price it should have it). Canon hood is expensive (I suggest Promaster instead). 4 foot min focus makes it hard to get close to things for nature shooting (I suggest the Kenko set of three tubes for about 130 USD). 67mm filter threads means expensive filters. No weather sealing. Not compatible with the 1.4x or 2x telephoto extenders (The L version is compatible).Again, this is all for your information, and none of this was worth taking a star off for. All these “cons” are part of the description of this lens, so to take a star off for any of them would unfair. It is up to the user to know what they are getting, and how to use it.ConclusionsThis lens might be the best sports lens from Canon for less than 1000 USD, provided you have good light. There are better lenses to be sure, but they are so much more expensive. There is the L version of the 70-300mm (1350 USD), or the 70-200mm models (1150 to 1950 depending on the model you want). Those work great and have excellent IQ, but not everyone wants to or can spend that kind of money on a lens. This is where Canon excels, offering inexpensive but effective lenses for those that need more than a kit lens but can’t afford the pro-level stuff. This is where lenses like the 70-300mm IS II come in, offering a lot of value for the price. I was very surprised by the level of clarity and color saturation I got from this lens. The nano-USM also was a surprise, being very fast and having no problem finding focus. I can see myself taking this lens to baseball games and soccer games simply because it is so effective for that kind of shooting. The fact that it is so light also is appealing, especially when walking around the zoo or even the park. To be honest, I never intended to keep my copy; I got it bundled with an 80D and wanted to use it just enough to review it and then sell it off. But since it has worked so well for me, I decided to keep it. It will be my zoo/outdoor sports lens.Other recommendations. It wouldn’t be a WOFG review if I didn’t have suggestions for other gear.For APS-C/ crop sensor - EF-S 55-250mm F4-5.6 IS STM – This is only for if you own a crop camera as described above. This lens is actually a little sharper than the 70-300mm, and otherwise has just about all the same pros/cons, specifically the IS and limited aperture. However, it is 200 dollars LESS than the 70-300mm. It has 50mm less reach, but I doubt this will make or break most your shots. It is worth pointing out the nano-USM outperforms STM for things like sport shooting, so if that is your intention the extra money might be worth it, though STM would be likely be good enough for casual shooters. It also has a much shorter min focus distance for better nature shooting without the use of extension tubes. The 55-250mm can even be bundled with most new APS-C Canon’s for 200 USD instead of 300, or can even be found elsewhere for about 150. Keep in mind there are a few versions of this lens, and the older 55-250mm IS ii is not as good as the IS STM. If you have a crop camera I would actually suggest this lens in most cases due to its very high price to performance ratio. If you have a full frame you can’t use it; the 70-300mm is your best option at this price range.For Full frame - Nothing. I don’t have a better lens suggestion for a full frame camera at this price point. The closest option is the Tamron 70-300mm, but it is currently the same price as the Canon. You will never get the performance from a third party lens as you will from a first party lens, so I don’t see any reason to get the Tamron instead. Some people like the Canon 70-200mm F4L USM for 600 USD. I used to say that was the best bang for your buck lens Canon had in the telephoto category, but that was before the 70-300mm IS ii and the 55-250mm IS STM. Both those lenses are less expensive and have IS, while offering very good IQ for their price. The 70-200mm F4 lacks IS, is pretty out of date, and is overpriced for what it can do. It does have better overall sharpness, but I just feel the better reach and IS counter the slightly better IQ. I don’t doubt it takes great photos, but so do the 55-250mm IS STM and the 70-300mm IS II.That is all I got. All that is left now is to check out the images. Thanks for reading my review!

Sorry about all the photos, it is an awesome lens!! I've owned a few Tamron lenses and loved EACH one!! The Tamron 18-400mm EF Canon mount lens is a great lens, BUT this one I think has a LOT better glass! I am new to Fujifilm and I am still getting used to the X-T3, I had a couple of the Fuji XC lenses and finally I saw this lens here in Amazon. I've been trying to find it other places and everyone was backordered!! I AM VERY HAPPY I FOUND IT HERE!! Great..... NO, AWESOME lens!!! At 18mm the lens will focus at .2 inches, that is 5mm. At 300mm it needs to be back around 2.5 to 3 feet. That is farther back than when I was using my Canon and Tamron 18-400mm lens, I will need to get used to my Fuji and Tamron 18-300mm lens. BUT the photos are MUCH better!!! I HIGHLY recommend this Tamron 18-300mm lens!! I just can't say enough good things about it!!! (hehe I could post several more photos, close focus/macro is great!!)

This adapter did the job! I can now use all my Canon, Tamron and Sigma lenses on my new Canon m50.

Exactly as described and fit perfectly. Needed it for my Tamron 28-75. Accidentally left the cap at a photo shoot.

It seems to have good glue, and the elastic band is long enough for a 28-300mm. I will upgrade to 5 starts if it stays glued for as year, like others Ibought in the past

Firm and stable with my Nikon D750 + 28-300mm lens mounted. Good built quality. It would be much better if the weight can be reduced further with that price and stability.

Fits perfectly to my Tamron Aspherical 28-400mm lens

I bought this filter for a Tamron SP 70-300mm f/4-5/6 Di VC USD telephoto lens. The filter was rather 'dirty' with speckles of dust and some mild 'grease' stains unevenly distributed across the filter area when I got it right out of the box! I managed to clean the filter successfully using a lens-pen without scratching it (phew...). However, I'm not sure who's the culprit.. the manufacturer or the seller (Overstocks Closeout). For the benefit of doubt, I'd still rate it 5-star as it isn't a big deal and the filter (after being cleaned) does it's job effectively without any signs of 'ghosting' in the photos I took so far (at least > 100 since using it).