The Canon EF-S 55-250mm f/4-5.6 IS STM Lens is an inexpensive, light, entry cấp độ telephoto zoom lens that has image stabilization, very good image chất lượng for the price & a very useful focal length range that will nicely complement mostgeneral purpose zoom lenses.It is a Canon "EF-S" lens, so the 55-250 IS STM lens is only compatible with APS-C format Canon EOS DSLR camerasincluding at this time the ultra-popular Rebel/***D/****D, **D (70D, 60D, 50D) and 7D models.

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The 55-250 IS STM lens follows on the heels of the Canon EF-S 18-55mm f/3.5-5.6 IS STM Lens introductionand includes similar enhancements found in that lens.While the introduction of entry-level lenses does not bring great excitement lớn the photographic community, this lens, lượt thích the 18-55 STM, is a marked improvement over its predecessor.The predecessor in this case is the Canon EF-S 55-250mm f/4-5.6 IS II Lens which I will refer to as the "IS II" throughout this review.Standout improvements are image quality and STM (Stepping Motor) driven AF with no front element rotation and no extension with focusing.

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Focal Length Range

The most popular (because of least cost) general purpose kit lenses (lenses typically purchased in the same box as APS-C formatDSLR cameras) have an upper kết thúc focal length of 55mm.The EF-S 55-250mm IS STM Lens obviously starts where these 18-55mm kit lenses end, leaving no gap và adding overlap only at 55mm (and not even 55mm if you look at the distances covered in actual test results).While gap and overlap are not usually a big deal, having every focal length covered at least sounds efficient.

And regardless of gap và overlap, the nearly 5x 55-250mm FLR (Focal Length Range) is very useful.For those of us that think better in full frame angle of view equivalent, this lens delivers 88-400mm.For examples of this FLR, I take you lớn the university gridiron and to Dutchman Falls near Worlds end State Park.

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55mm | 70mm | 110mm | 150mm | 210mm | 250mm 55mm | 70mm | 110mm | 150mm | 210mm | 250mm

For the above examples, I attempted to set the focal lengths to the ones printed on the lens barrel (55mm, 70mm, 100mm, 135mm, 200mm và 250mm).I figured I misaligned zoom ring for the first set, but ... The second set"s reported focal lengths exactly matched the first.This was not likely a coincidence – and doesn"t really matter in real use as you seldom need to lớn select a precise focal length for your shot.You select the proper perspective and framing và that focal length becomes the right one.

The examples above should give you a good understanding of what khổng lồ expect from the excellent FLR of this lens, a FLR that opens this lens up lớn a very wide range of uses.Wildlife, portraits, sports (under good light), air shows, a walk in the park, a hike in the mountains, a day at the beach & I could go on and on.And of course landscapes are included, but few lenses cannot be used for landscapes.However, telephoto lenses are often overlooked in a landscape lens selection.Great telephoto landscapes, with less background needed, are often very easy lớn capture.Or zoom to 250mm & aim high for a moon capture.

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Like most zoom telephoto lenses reaching beyond 200mm, this lens has a variable max aperture.While the overall max aperture range is shown in the hàng hóa name (f/4-5.6), the max aperture step-down chart shows the full story.Ideally, larger focal length numbers are in the left-most columns of the chart, indicating wider apertures available at longer focal lengths.In this chart, we see that the 55-250 STM ranks near last place in terms of max aperture available at focal lengths.But, the difference is not dramatic with 1/3 stop of difference being, in general, the most shown.

Modelf/4.0f/4.5f/5.0f/5.6
Canon EF-S 55-250mm f/4-5.6 IS STM Lens55-63mm64-99mm100-154mm155-250mm
Canon EF-S 55-250mm f/4-5.6 IS II Lens55-73mm74-95mm96-153mm154-250mm
Canon EF 70-300mm f/4-5.6 IS L USM Lens70-103mm104-154mm155-228mm229-300mm
Canon EF 70-300mm f/4-5.6 IS USM Lens70-84mm85-134mm135-224mm225-300mm
Canon EF 70-300mm f/4.5-5.6 vì chưng IS USM Lens70-94mm95-184mm185-300mm
Canon EF 75-300mm f/4-5.6 III USM Lens75-94mm95-139mm140-239mm240-300mm
Canon EF 100-400mm f/4.5-5.6L IS USM Lens100-129mm130-259mm260-400mm

A fixed-max-aperture lens such as the Canon EF 70-200mm f/4L USM Lens has a significant aperture advantage at the long over of the FLR –1 stop (twice as much light) in this case.

Image stabilization adds significantly lớn a narrow aperture telephoto lens" usefulness.This lens is image stabilized and this feature sets it apart from Canon"s other inexpensive telephoto zoom lens,the Canon EF 75-300mm f/4-5.6 III USM Lens.I find IS khổng lồ be a huge advantage when handholding a lens.

Helpful especially khổng lồ movie audio recording is that this IS implementation is essentially silent.If you put your ear against the lens, you can hear some light clicking/humming, but you will seldom notice that IS is on – except in the viewfinder.The difference between properly framing a subject at a narrow angle of view (such as 250mm) with IS on và with IS off is lượt thích night and day.This results in less framing correction via cropping in post processing – which reduces image resolution and costs you time.

You will notice the effects of image unique in your results.The 55-250 STM IS is rated for 3.5 stops vs. 3 stops for the IS II (which was originally rated at 4 stops before Canon adopted the CIPA standard).Because this lens is so light, I find it hard to hold rock still (an inertia issue) – và this effects my handheld image sharpness overall.

The 3.5 stops rating falls between 1/13 & 1/15 second shutter speeds for me.At 1/15 second, most of my images are sharp.From 1/13 through 1/8, I"m still getting near or above một nửa of my images sharp. With shutter speeds longer than 1/13, sharp result percentages drop off rapidly with a few keepers remaining at .3 và .4 seconds.

My results in normal use were not nearly as good as my perfect scenario studio test results with 1/40 và 1/50 shutter speeds not adequate even at 55mm some of the time.

At 250mm, hand shake is significantly magnified.And at 250mm, when asking for more than 3 stops of assistance from IS (1/50 second), results were mixed.But, I must have used perfect size at 1/20 second because I shot a string of 7 sharp images in a row.Again, in the field, I needed a significantly faster shutter tốc độ for good results.

Image stabilization does not negate the need for a tripod in all situations and a tripod is always preferred when a situation permits use of such.Canon says that image stabilization should be turned off when using a tripod and their reason for this advice is khổng lồ save battery power.While the battery consumption difference is generally of little regard khổng lồ me, I can tell you that this lens frequently delivers very blurred images with IS enabled while tripod mounted.Also of concern is that the subject framing changes slightly when IS is active, leaving you with a potentially misaligned image.The manual recommends leaving IS enabled with monopod use.

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Image Quality

Image unique has easily been the biggest drawback for me khổng lồ recommend Canon"s 55-250mm lenses.These lenses just haven"t been very good performers – especially at the upper over of the FLR.The Canon EF-S 55-250mm f/4-5.6 IS STM Lens changes things in this regard.

With 15 lens elements in 12 groups, the IS STM has an obviously different optical design compared to lớn the IS II"s 12/10 design.And perhaps the most notable feature of this lens is the image chất lượng it delivers.

At apertures wider than f/5.6, expect mildly soft results from this lens (turning up the sharpness setting counters much of this).At f/5.6, image sharpness is quite good over the entire focal length range và across the entire frame, which also means that this lens is quite sharp at 200mm và above with a wide open f/5.6 aperture.Except at 100mm, I am seeing very little difference in f/8 image chất lượng over what is delivered at f/5.6.The 100mm focal length is the weakest in this lens and improvement is still being seen at f/8 at 100mm.

Using an aperture narrower than f/8 with most modern high megapixel (15+) APS-C format DSLRs results in increasingly soft results due to lớn diffraction.This attribute is not chất lượng to the 55-250 IS STM as all decent unique lenses mounted on these APS-C format cameras will show the same decrease in overall sharpness.I"m not saying that you should not use apertures narrower than f/8, but that you should be aware of the trade-offs for doing so.Use the site"s image unique toolto see the difference for yourself.

When we look at a comparison between the 55-250mm IS STM and the 55-250 IS II,the new lens is looking remarkable.The STM delivers significantly better image unique than the IS II from 135mm through 250mm – even when stopped down khổng lồ f/8.The improvement can be seen in the center of the frame & the difference in the corners is dramatic.

Surprisingly, my IS II performed even (noticeably) better than my IS I at longer focal lengths.See this difference in the image unique tool.

With a narrow max aperture, getting good image unique wide mở cửa becomes especially important.This sharpness improvement is a big khuyễn mãi giảm giá – this lens is delivering impressive image sharpness for the price.

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The parts of your image that are not sharp also matter and a blurred background is accomplishable with this lens, though primarily at the longer focal lengths.The unique of that background blur (bokeh) then becomes important.This lens has a rounded 7-blade aperture.Here are some 100% examples of this blur with that aperture stopped down khổng lồ f/8.