The zoom ring is large, covered with ribbed rubber, well damped and doesn't creep. So more of a minor irritation than a hindrance. On my 70D and 80D the lens goes blurry during reset and returns to the prior MF setting. The gotcha is MF focus resets when the camera wakes from sleep mode or is powered on. Pitch is fairly fine and easy to dial in accurate focus. The focus-by-wire manual focus (MF) works without switching out of AF mode: grip and turn the ring with the shutter button half depressed. The only improvement I could wish for in an updated model is compatibility with the Power Zoom Adapter PZ-E1. Focus is silent to camera mics as is the image stabilization (IS). This zoom was designed with video in mind and the STM drive is silky smooth, just the right focus (slow) speed and highly effective for pulls and movie servo.

Once in the ball park, AF should work if I'm careful to place an active AF point on a high contrast object. The workaround is to use MF to bring it back. Instead, AF pulls back to close focus and sits there, unable to focus on anything no matter how contrasty. And when it misses focus it doesn't quickly pull back for another go like USM. However, it's more prone to misses in low contrast situations than my ring-USM telezooms or any telezoom I've owned for that matter. The front element doesn't rotate or extend during focusing, allowing easy use of polarizing filters.įocus is reliable on my 70D and 80D most of the time. July 4th 2017 | EOS 70D/EF-s 55-250 4.0-5.6 IS STMĪ rear element focusing group is driven by a stepping motor (STM) and is peppy enough for most general photography (but not sports). The weak point is the plastic mount but that's how designers kept it to a feather light 375g. However, fit and finish are very good with quality plastics, sturdy switches, smooth turning rings and a wobble-free nested barrel. Overall appearance is on the plain and inexpensive side. The EF-S 55-250 4-5.6 IS STM covers a 4.5X zoom range of short telephoto to moderately long telephoto-similar to 90-400mm on a full-frame camera-making it ideal for hiking and travel.Ĭanon EF-s 55-250 4.0-5.6 IS STM | Photo courtesy Canon Inc.īuild is light duty and, at a slender 2.8' x 4.4,' similar in size to a Micro Four Thirds telezoom. Honolulu Harbor | EOS 70D and EF-s 55-250 4.0-5.6 IS STM It is an EF-S lens and thus only compatible with APS-C (1.6x crop) DSLRs such as Rebels, 70D, 80D, etc. The EF-S 55-250 4-5.6 IS STM is a petite and ultra lightweight telezoom aimed at hobbyists and light packers.

Canon 70d bokeh video lens