Neither a distance scale nor indicators for depth of field or infrared adjustment are provided. The lens is supplied with end caps but no lens hood. A lens hood ET and lens case LP are available as optional accessories. The two lenses have similar optical constructions and identical close focusing points, although the mm lens is marginally slimmer and 80 grams heavier and its barrel extends about 8 mm further at full zoom extension.
In our user tests it was a good match of the EOS D but felt slightly less comfortable on the heavier 40D body. Moving from the 55mm position to the mm position required roughly a quarter of a turn and we found the markings on the lens barrel corresponded very well with the actual focal length settings. When zooming from the 55m position to the mm position, the lens barrel extends by 62 mm and the front element rotates.
This makes using angle-critical attachments like polarisers and graduated filters difficult. No zoom lock is provided — and none is required as the review lens showed no tendency to slide when carried pointing downwards.
The focusing ring also moves through about a quarter of a turn but is only usable when MF has been selected on the lens. Autofocusing speeds were good for a lens of this speed, even in low-light conditions. AF noise was relatively low.
All wavelengths of light are not being identically refracted, causing the color spill. While you should expect some flare from this lens when bright lights are in the frame, the amount of flare is not bad.
Mild barrel distortion is present at 55mm. The transition to pincushion distortion happens at around mm where this lens is nearly distortion-free. The amount of pincushion distortion, even at mm, is rather mild.
Overall, this lens has very good image quality. When the price is factored in, it becomes a very good deal. Focus speed is good under decent light levels, but initial focus acquisition was very slow on occasion. The biggest problem I encountered was when I wanted to quickly capture a shot sports action for example and either the lens was in a diffusely out of focus condition or doing a focus reset upon waking from sleep mode.
If the subject is moving, the moment can be gone before focus is acquired. New with this lens is internal focusing. I prefer the more-fixed-size design. Nice is that now a lens hood can be rotated into place without the lens barrel extension turning the focus motor gears to one extent or the other — to gain enough resistance for the hood to turn into or out of place.
Even more important with the new design is that the front lens element does not rotate. If you've ever tried using circular polarizer filters on the IS II, you've experienced frustration. CPOL filters are rotated to dial in just the right amount of effect — an effect that can greatly enhance some photos.
Any rotation of the filter changes the effect. A too-common scenario of CPOL filter use on the IS II was: Zoom, focus, adjust filter, push in too much on the end of the filter and inadvertently change focus, focus again, adjust filter, perhaps repeat. Then do the same again for the next shot if the focus distance changes. The new design allows the filter to be easily adjusted and it stays adjusted for use in similar-scenario and orientation follow-up shots. The difference is night and day for landscape photography.
Quick focus changes in a video come across sharply to the viewer and are best avoided. Another feature desired for video is that subjects do not significantly change size as they go into and out of focus.
The STM meets this requirement. The STM system is a focus-by-wire design that needs power from the camera to function. You can't just pick up the camera and manually focus this lens unless the lens is set to manual focus-only mode via a switch and the camera is awake.
This lens is not parfocal. If you change focal lengths zoom in or out , focus should ideally be re-obtained. You might not see much of an issue of zooming out at longer focus distances, especially with modest focal length changes. A full extent focal length increase in focal length is going to result in a blurry image.
In the all-important focus accuracy department, I am seeing very good consistency. Focus accuracy is right on at the mm end of the FLR with slight backfocusing at 55mm on my 60D.
Consistent back or front focusing can be dialed into perfection using Autofocus MicroAdjustment if your DSLR has this feature , but unless your DSLR allows adjustments at both ends of the focal length range, you are left to chose one focal length or the other for adjustment.
AI Servo AF tracking an in-motion subject is most-challenging to both cameras and lenses as adjustments are typically being made continuously and need to be completed immediately.
With a relatively narrow aperture on a small sensor format delivering relatively deep depth of field, accuracy requirements are not as critical with this lens.
I canceled my first planned AI Servo testing session due to heavy cloud cover. I would have needed ISO to get a shutter speed fast enough to stop the action and ISO noise levels are high enough to mask the plane of sharp focus, negating the purpose of that testing.
The next test plan was to shoot the warm up portion of a soccer game with the STM. I would then shoot the rest of the game with a big white Canon L lens and a 1-Series body. The warm-ups were cut short, so I decided to just shoot the game with this lens. Add to Wish List.
Create a new Wish List. Wish list created successfully. Click Here for details. Protection from Accidental Damage. Coverage from Normal Wear and Tear. Complimentary Customer Support. Free Two-Way Shipping. No plan. Need to Order More Than 10? Quick Info Content. Lens Case LP What's Included? Diameter x Length, Weight: 2. Add To Cart. Read more reviews ». Latest buying guides. Best video cameras for photographers in Best cameras for Instagram in Best drones in Best cameras for vlogging in Check out more buying guides ».
Nikon Z9 initial review. Sony a7 IV initial review. Nikon Nikkor Z mm F2. Sigma mm F Discover more challenges ». Nikon Z9 4. Popular interchangable lens cameras ». Popular compact cameras ». Shedding some light on the sources of noise. Adapting to Panasonic. Mobile site. Reproduction in whole or part in any form or medium without specific written permission is prohibited. Threaded view.
Irridescent forks by microsurgeon from Cutlery. Viltrox EF-M2 Tamron mm ef-s fit. Pocket Lint.
0コメント