jerclarke
Well-known member
This lens has many problems that make it frustrating to use. It is probably the cheapest access to 480mm equivalent reach, but much better options are available from Canon for only slightly more money.
It has terrible chromatic aberrations giving thick, vibrant green and purple fringing on high contrast areas. I am into birds and hoped this lens would give me good closeups, but any time the sky has sticks in front of it the aberrations get grazy. These aberrations are corrected via optics and coatings and all the new tech of higher quality lenses, this lens is not up to Canon's usual standards.

Demo of the insane chromatic aberrations this lens gives when you mix branches and sky.
I was given this lens by my brother who got an 18-135mm and didn't think he'd need his long zoom any more. He says he got the 75-300mm as part of a Rebel kit where the lens was basically thrown in for free. I can imagine why they were trying to get rid of these and/or needed a super-cheaply-produced zoom to promote kit sales. Either way this is a lens with a lot of compromises.
The "USM" (ultra-sonic motor) designation on this lens is misleading, as USM usually implies high-quality focusing mechanisms that are quiet and fast. The focusing on this lens feels worse than the 18-55mm kit lens from the same era and I often have to use manual focus because aiming with the focus points just won't latch onto things below them. On my Rebel 450D the "50mm f/1.8 II" lens has much better success using focus points than this lens. The focusing motor on this lens is not silent, it makes plastic whirring and clunking sounds that are fairly loud.
In this lens's favor the manual focus ring is decent and allows precise focussing (though it still has a bit too much play). I find it better than the famously awful focus rings on the 18-55mm kit lenses and 50mm f/1.8 II. Given that modern DSLRs are not well equipped for manual focussing in general I don't think having a decent focus ring is enough of a solution to the AF problems in this lens.
The lack of image stabilization (IS) on a lens this long is another big problem. Every single other Telephoto Zoom made by Canon has IS and it's not a coincidence. IS is needed to avoid camera shake at the long end of zooms because they are inherently shaky. Ancient wisdom tells us that shutter speed should always be at least as high as the focal length to get a stable shot, so at 300mm you are unable to get crisp shots at 1/100s that would have been fine at 55mm . IS is always worth it on long zooms, this lens should have it but doesn't.
Canon's lineup on their Canada website:
If you're like me and this is your only lens with the long reach then make the most of it! I get some great images off it and currently it's my only way to even hope for good bird shots. Chromatic aberrations degrade image quality in some cases, but most people won't notice them. Try your hand at manual focus with it!
If you are considering buying this lens then you probably should find something else. The Canon EF-S 55-250mm f/4.0-5.6 IS seems like the logical choice if you are using an APS-C camera and is only 50$ more expensive. It has slightly less reach at the long end but 55mm at the short end makes the lens more useful for mixing in portraits or other general photography. The IS will help your photography immensely unless you always use a tripod. There are various versions of the 55-250mm at different prices, but even the first one, released in 2007, has positive reviews on this site.
If you have a full frame camera then it's hard to imagine you are even considering this lens
Here are some heavily post-processed (and cropped) photos taken with this lens and my 450D:



It has terrible chromatic aberrations giving thick, vibrant green and purple fringing on high contrast areas. I am into birds and hoped this lens would give me good closeups, but any time the sky has sticks in front of it the aberrations get grazy. These aberrations are corrected via optics and coatings and all the new tech of higher quality lenses, this lens is not up to Canon's usual standards.

Demo of the insane chromatic aberrations this lens gives when you mix branches and sky.
I was given this lens by my brother who got an 18-135mm and didn't think he'd need his long zoom any more. He says he got the 75-300mm as part of a Rebel kit where the lens was basically thrown in for free. I can imagine why they were trying to get rid of these and/or needed a super-cheaply-produced zoom to promote kit sales. Either way this is a lens with a lot of compromises.
The "USM" (ultra-sonic motor) designation on this lens is misleading, as USM usually implies high-quality focusing mechanisms that are quiet and fast. The focusing on this lens feels worse than the 18-55mm kit lens from the same era and I often have to use manual focus because aiming with the focus points just won't latch onto things below them. On my Rebel 450D the "50mm f/1.8 II" lens has much better success using focus points than this lens. The focusing motor on this lens is not silent, it makes plastic whirring and clunking sounds that are fairly loud.
In this lens's favor the manual focus ring is decent and allows precise focussing (though it still has a bit too much play). I find it better than the famously awful focus rings on the 18-55mm kit lenses and 50mm f/1.8 II. Given that modern DSLRs are not well equipped for manual focussing in general I don't think having a decent focus ring is enough of a solution to the AF problems in this lens.
The lack of image stabilization (IS) on a lens this long is another big problem. Every single other Telephoto Zoom made by Canon has IS and it's not a coincidence. IS is needed to avoid camera shake at the long end of zooms because they are inherently shaky. Ancient wisdom tells us that shutter speed should always be at least as high as the focal length to get a stable shot, so at 300mm you are unable to get crisp shots at 1/100s that would have been fine at 55mm . IS is always worth it on long zooms, this lens should have it but doesn't.
Canon's lineup on their Canada website:
If you're like me and this is your only lens with the long reach then make the most of it! I get some great images off it and currently it's my only way to even hope for good bird shots. Chromatic aberrations degrade image quality in some cases, but most people won't notice them. Try your hand at manual focus with it!
If you are considering buying this lens then you probably should find something else. The Canon EF-S 55-250mm f/4.0-5.6 IS seems like the logical choice if you are using an APS-C camera and is only 50$ more expensive. It has slightly less reach at the long end but 55mm at the short end makes the lens more useful for mixing in portraits or other general photography. The IS will help your photography immensely unless you always use a tripod. There are various versions of the 55-250mm at different prices, but even the first one, released in 2007, has positive reviews on this site.
If you have a full frame camera then it's hard to imagine you are even considering this lens
Here are some heavily post-processed (and cropped) photos taken with this lens and my 450D:



