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Get information and user reviews for this lens from Amazon: Canon EF 100-300mm f/4.5-5.6 USM Telephoto Zoom Lens for Canon SLR Cameras
In terms of optical performance the Canon EF 100-300mm f/4.5-5.6 USM is about in line with other consumer grade tele zoom lenses. The resolution figures are excellent and 100mm but unsurprisingly tMORE’s a penalty at longer focal length specifically at 300mm @ f/5.6. At 200mm and more so at 300mm you should stop down a little to lift the resolution and contrast level. Distortions and vignetting are usually nothing to worry about whereas CAs are a significant although largely correctable weakness at 200mm and 300mm. On the positive side the tested sample showed a very good center (lens alignment) which is quite rare for a lens in this class. The mechanical quality is a step up from the typical kit zoom – this is most obvious in the IF (internal focusing) design and the very fast ring-type USM drive. Unless you can afford the (substantially better) EF 70-300mm f/4-5.6 USM IS the EF 100-300mm f/4.5-5.6 USM is a remains good choice in the sub-300â‚¬/US$ tele zoom lens league. Just don’t expect any wonders at longer focal lengths. READ FULL REVIEW
Other Canon 100-300mm f/4.5-5.6 USM EF Reviews
While this lens may have been very capable in its day, it’s fairly easy to argue that technology has marched on and left this lens in its wake; as a 100-135mm lens it works very well, but it shows soft results with noticeable chromatic aberration at anything more telephoto than that. A good lens to have in a collection if you find a good deal, but There are other, better options to actively seek out. READ FULL REVIEW
The Canon EF 100-300mm f/4.5-5.6 USM Lens is a mid-grade long telephoto zoom lens. the Canon EF 100-300mm f/4.5-5.6 USM Lens is built reasonably well. The finish does not appear modern, but the build quality is decent. A metal lens mount shows that the 100-300 is not a bottom-of-the-line lens. The Canon EF 100-300mm f/4.5-5.6 USM Lens provides reasonable optical quality in a wide focal length range with fast Ring USM autofocus for a reasonable price. READ FULL REVIEW