Ef lenses

Canon"s EF-S 18-55milimet kit lenses have sầu always been small, light and cheap & the latest versions have the very useful image stabilization feature.These lenses have been & continue khổng lồ be a good value when purchased as a starter lens in a DSLR kit, but they have sầu never been a strongly desired lens otherwise.The Canon EF-S 18-55milimet f/3.5-5.6 IS STM Lens is Canon USA"s fifth EF-S 18-55milimet lens, & some of you in other countries may have sầu seen an additional EF-S 18-55 lens Model available.While some of those lens iterations were mostly cosmetic, the "STM" version of this lens comes with some definite advantages over its predecessor,the Canon EF-S 18-55milimet f/3.5-5.6 IS II Lens, which continues khổng lồ be available at nhận xét time.

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Here are some of the differences between the 18-55 IS II và the 18-55milimet IS STM Lens:

STM (Stepping Motor) AF (vs. Micro Motor)Continuous AF during đoạn phim recording with compatible cameras (those with Hybrid CMOS AF)Vastly improved manual focus ringFront element does not rotate and does not extkết thúc with focusingFull time manual focusing supported during shutter release half-pressShorter minimum focus distance (9.8" vs. 11", 250mm vs. 280mm) và maximum magnification (0.36x vs. 0.28x) specs (read about reality below)New optical kiến thiết with 13 lenses in 11 groups (vs. 11/9)7 rounded aperture blades (vs. 6 rounded)Larger zoom ringNew petal-style lens hood that provides up to lớn 0.46" (11.7mm) better protection from light and damage.50% higher price (in kit)

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Rebel SL1 |Rebel T5i

As one would expect from a kit lens, this lens is designed for everyone"s most-common focal length needs.The Canon EF-S 18-55mm f/3.5-5.6 IS STM Lens" focal length range falls squarely in the recommended general purpose zoom lensfocal length range for ASP-C/1.6x FOVCF sensor format DSLRs.But it does not extkết thúc the recommended minimum on either over of the focal length range.

Here is an example of the 18-55milimet focal length range.Clichồng on the image lớn see three additional examples (page opens in new window).

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18mm | 24milimet | 35mm | 55mm

18milimet acts like a 28.8mm angle of view on a full frame DSLR camera.This is a moderately wide angle of view that is common with EF-S zoom lenses, but you will likely wish for wider on occasion.Especially when photographing wide landscapes, interiors & architecture.

The 55milimet over frames lượt thích 88milimet on a full frame camera.This is a nice angle of view that encompasses portraiture – but save sầu the headshots for a telephoto lens.Portraits taken from a cchiến bại distance will start showing perspective distortion - including big noses - và are best avoided.

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18-55milimet IS STM Lens |18-135milimet IS STM Lens

The usefulness of this lens is limited in part by its near-slowest/narrowest-available max aperture.Though this lens is not far from the normal variable aperture crowd, few lenses have sầu narrower max apertures than this one at comparable focal lengths.A relatively wide angle focal length range & relatively narrow aperture, along with the coinciding relatively deep DOF (Depth of Field),means that creating a strong background blur is not a strength of this lens.

Being a variable aperture lens means that wide open exposure settings are going lớn change as the lens is zoomed to the longer focal lengths.Here is a table comparing the aperture step down focal lengths of some other Canon alternative lenses.

Modelf/2.8f/3.2f/3.5f/4.0f/4.5f/5.0f/5.6f/6.3
Canon EF-S 15-85milimet f/3.5-5.6 IS Lens15mm18mm27mm38mm61mm
Canon EF-S 17-55milimet f/2.8 IS Lens17mm
Canon EF-S 17-85mm f/4-5.6 IS Lens17mm26mm38mm47mm
Canon EF-S 18-55mm f/3.5-5.6 IS STM Lens18mm24mm32mm37mm47mm
Canon EF-S 18-55milimet f/3.5-5.6 IS II Lens18mm24mm29mm39mm47mm
Canon EF-S 18-55milimet f/3.5-5.6 IS Lens18mm24mm28mm39mm47mm
Canon EF-S 18-135mm f/3.5-5.6 IS STM Lens18mm24mm35mm50mm76mm
Canon EF-S 18-135milimet f/3.5-5.6 IS Lens18mm22mm31mm41mm64mm
Canon EF-S 18-200mm f/3.5-5.6 IS Lens18mm24mm40mm50mm90mm

A narrow max aperture lens is not useless.Letting in only a relatively small amount of light means that that the 18-55 IS STM will not be a great lens choice for stopping action in low light, but with the advances we have seen in DSLR low light performance(reduced high ISO noise), this lens has plenty of uses awaiting it.And, image stabilization comes khổng lồ the rescue of your motionless-subject photography.

Image stabilization has (practically) become a standard zoom lens feature these days and it is extremely valuable to me.In-lens IS will allow a camera to be handheld at very long exposure settings và provides a stabilized viewfinder image that sida in subject framing.The Canon EF-S 18-55milimet f/3.5-5.6 IS STM Lens features a 4-stop-rated IS system.With each stop being a 2x change in the amount of light reaching the sensor, 4 stops of assistance means that you can shoot in 1/16th as much light as without IS (một nửa x một nửa x một nửa x 1/2).That difference is huge.Image stabilization does not stop subject motion, but it makes a remarkable difference in still subject photography.

Image stabilization has matured significantly over the years.This IS implementation is virtually silent (will not be heard in sound recorded in-camera during video clip capture) và does not causing image framing to jump around.

Stabilization assistance testing revealed that, at 18mm, most of my 1/4 sec images were sharp and a significant percentage of my .3 sec images were also sharp for about 3 2/3-stops of assistance for me.The rate of sharp images slowly drops until about 1 second where my sharpness rate reached 0%.At 55mm, most of my 1/8 sec images were sharp và a significant percentage of my 1/6 sec images were also sharp for just under 4 stops of assistance.The rate of sharp images trails off through about .3 sec.Don"t expect sharp images at these long exposure times under less-than-ikhuyễn mãi giảm giá conditions, but expect the amount of assistance khổng lồ be similar.

The difference image stabilization makes in your real life images can be dramatic.After this thử nghiệm, I forgot khổng lồ turn IS baông xã on.After shooting for a relatively short period of time, I realized that IS was turned off.Every shot I had taken khổng lồ that point was seriously blurred.After turning IS on, the results were much better.

Here is a with and without image stabilization example captured at .8 seconds (handheld of course).

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You are buying a DSLR camera lớn get great images.And great image unique is a significantly important part of great images.

With a wide open aperture, vignetting (peripheral shading) ranges from about 1.5 stops in 18mm frame corners down to a barely-noticeable about-.8 stops in 55mm frame corners.You will get less vignetting from full-frame-compatible EF lenses on an APS-C format camera, but these results are not bad.Stopping down (selecting a narrower aperture), as usual, reduces vignetting.

The 18-55 STM shows a considerable amount of CA (Chromatic Aberration) until the long end of the focal length range.A good way to visualize this is to lớn view the 18-55mm STM Lens image quality results for 18milimet.The demo chart is only black & White.The colors you see are the different wavelengths of light being refracted by different amounts.Because software can (often) nicely clear up CA, it is my favorite lens defect (if I have lớn pichồng one).

With a wide open aperture, the Canon EF-S 18-55mm f/3.5-5.6 IS STM Lens is reasonably sharp from 18milimet through the mid focal lengths.Stopping down (narrower aperture) a stop or two makes little difference in image sharpness in this range.At 55mm, where the CA resolves, you will better appreciate the mediocre image sharpness at f/8 than what a wide open f/5.6 aperture will provide.Stopping down beyond f/8 will result in softer images from most recent DSLR models due to lớn diffraction.

The IS II lens is slightly sharper at 55milimet, but the IS STM has some minor advantages in wider focal length comparisons.Neither is going lớn be renowned for sharpness.

Expect lớn see some flare from this lens.While the flare pattern is different from the IS II, which lens is better in this regard is mostly a matter of opinion.

The 18-55 STM has relatively strong barrel distortion at 18mm.This distortion is going to be noticeable in images with straight lines near the borders – such as in the phokhổng lồ shown below.

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The big issue with barrel distortion (or pincushion distortion) is that straight lines are rendered as curves.Relative subject sizes are also distorted with center-of-the-frame subjects becoming larger.

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Distortion also makes the original capture more difficult as it is hard to cấp độ a curved subject in the frame.The results of distortion are usually correctable with software, but this is a destructive sầu process to lớn pixel-cấp độ details.

The 18-55 STM holds its barrel distortion lớn a longer focal length than the IS II.The crossover/neutral distortion focal length is around 35milimet.By 55milimet, a mild amount of pincushion distortion is visible.

The 18-55milimet IS STM lens gets a nice tăng cấp in the bokeh (background blur quality) department.With an extra curved aperture blade (now 7), OOF (Out of Focus) points of light remain circular-shaped & relatively smooth even with a stopped down aperture(where the number of blades and blade shape affect the results the most).The 18-55milimet IS II"s aperture blades are curved, but I could clearly see 6 blade edges in OOF highlights in some stopped-down-aperture images.Because this lens does not create a strongly blurred background unless shooting at minimum focus distance at 55mm, few will significantly care about this improvement.

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The Canon EF-S 18-55mm f/3.5-5.6 IS STM Lens" improved focus system is worth every penny of the increased street price (over the IS II).To begin with, this lens focuses quickly và very quietly.So quietly that you will need lớn put your ear next khổng lồ the lens in a quiet room khổng lồ hear the cliông chồng sounds autofocusing makes.The IS II Model made autofocusing very audibly-apparent.

Also, this lens is now internally focusing.No longer does this kit lens Mã Sản Phẩm extend & rotate the front element during focusing as all of the previous EF-S 18-55mm lenses have sầu done.The laông xã of extension is very nice and the fixed front filter threads are a huge improvement – especially forcircular polarizer filter use.These filters are rotated to dial in just the right amount of effect – an effect that can greatly enhance some photos.When focusing turns the front filter threads, that effect is adjusted to lớn something less than optimal.

The lens hood can now be installed without the lens barrel extension turning the focus motor gears lớn one extent or the other – khổng lồ gain enough resistance for the hood to turn inkhổng lồ (or out of) place.

With a generally deep DOF (Depth of Field), this lens" AF system is not overly challenged lớn focus accurately enough.And it does that.

The STM AF system is designed to allow continuous autofocusing during đoạn Clip recording when mounted lớn certain compatible DSLRs (Rebel T4i, Rebel T5i, Rebel SL1 & EOS M at reviews time).This feature works, but don"t expect to lớn traông chồng your kid running the bases at a cthất bại distance và don"t expect production grade focus pulls.Slow subject motion is indeed tracked with reasonable performance – & the autofocusing prior lớn đoạn phim recording is helpful.Nice is that subjects bởi not change size significantly during focusing with this lens.

The 18-55 STM has FTM (Full Time Manual) focusing, but it took me some time khổng lồ figure out this feature as it is not the same as with many of Canon"s other FTM focus-supporting lenses.The key is that the shutter release must be pressed half way khổng lồ enable manual focusing after autofocus lock.You can"t just pichồng up the camera và manually focus this lens unless the lens is phối lớn manual focus-only mode (a switch).

This lens is far from being parfocal – the subject does not remain in focus as the focal length is changed.And, if camera is powered off or in sleep mode, adjusting focal length typically results in a very out of focus subject.But, if the camera is powered on & awake, the lens automatically adjusts the focus to remain on the subject.Essentially, giải pháp công nghệ is used to overcome the optical design limitation.Nice.

Instead of a slim, raised, knurled area molded onto the over of the wobbly extending lens barrel as found on the IS II, the 18-55 STM gets a real manual focus ring.It remains small, but is incredibly more useful.No longer does the image framing change greatly while manually focusing the lens và focus adjustments can now be very precisely made.

Manual focusing is only available when the lens is mounted and the camera is powered on (and awake).The STM system is a focus-by-wire thiết kế that needs power from the camera to function.

This is a bare-bones lens - it has no focus distance markings whatsoever.

The 18-55mm IS II lens had a very nice MM (Maximum Magnification) spec of 0.34x, and the 18-55milimet IS STM take a tiny step forward with a 0.36x spec.The IS STM MFD tests accurately to its 9.8" (250mm) minimum focus distance spec.This MM spec is bested by few other zoom and non-macro lenses.

ModelMFDMM
Canon EF-S 10-22mm f/3.5-4.5 USM Lens9.4"(240mm)0.17x
Canon EF-S 15-85milimet f/3.5-5.6 IS USM Lens13.8"(350mm)0.21x
Canon EF 17-40mm f/4L USM Lens11.0"(280mm)0.25x
Canon EF-S 17-55mm f/2.8 IS USM Lens13.8"(350mm)0.16x
Canon EF-S 17-85milimet f/4-5.6 IS USM Lens11.8"(300mm)0.20x
Canon EF-S 18-55milimet f/3.5-5.6 IS STM Lens9.8"(250mm)0.36x
Canon EF-S 18-55milimet f/3.5-5.6 IS II Lens9.8"(250mm)0.34x
Canon EF-S 18-55mm f/3.5-5.6 IS Lens9.8"(250mm)0.34x
Canon EF-S 18-55milimet f/3.5-5.6 II Lens11.0"(280mm)x
Canon EF-S 18-55mm f/3.5-5.6 Lens11.0"(280mm)x
Canon EF-S 18-135milimet f/3.5-5.6 IS STM Lens15.4"(390mm)0.28x
Canon EF-S 18-135mm f/3.5-5.6 IS Lens19.3"(490mm)0.21x
Canon EF-S 18-200mm f/3.5-5.6 IS Lens17.7"(450mm)0.24x

Magnification from wide angle through standard/normal focal length lenses is generally significantly increased with the use of extension tubes.With the EF-S 18-55 IS STM lens, magnification with the Canon EF 12milimet Extension Tube II increases to lớn 0.65x andlớn 1.00x with the Canon EF 25milimet Extension Tube II.

And sometimes, the native max magnification is quite adequate:

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OK, not everyone appreciates snakes.How about a flower?

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Those are 55mm near-MFD examples.The flower photo was captured handheld at 1/6 second.

No current-at-review-time Canon EF-S Lenses are compatible with Canon extenders.These extenders are physically unable to lớn mount behind the EF-S lenses.

One of the Canon EF-S 18-55milimet f/3.5-5.6 IS STM Lens" best features is its low price.However, low price often comes with sacrifices.And in this lens" case, build unique is a significant sacrifice.While this lens is built modestly better than the IS II (the extending barrel has less wobble), it is not much different in this regard.

My IS II lens died on the table while working on this Đánh Giá.I had the IS STM lens and a barely-used IS II lens in front of me on the desk.I was mounting one & then the other khổng lồ make comparisons.Upon installing the IS II, the camera could no longer mix the aperture and then gave an 01 communications error.The IS II lens never worked again.The dead lens is not the same model as the IS STM, but ... my confidence cấp độ is quite low for the STM lens also.

If I was photographing something important, this may be the last lens I would choose for doing so.At least without having a backup lens with me.