The
EF 40mm f/2.8 STM was declared in June 2012, along with the EOS 650D
(Rebel T4i) SLR and EF-S 18-135mm f/3.5-5.6 IS STM zoom. Both of
these lenses were Canon's first to utilize a linear stepper motor for
focusing, giving rise to the 'STM' identification; this motor kind
enables quiet refocusing during movie record, and has thus become
widely used in lenses for mirrorless cameras. This indicates that in
theory the 40mm STM needs to be well suited to working together with
the hybrid AF systems in Canon's recent cameras, including the 650D
and its substitute the EOS 700D (Rebel T5i), the EOS M mirrorless
version, along with the diminutive EOS 100D (Rebel SL1).
The 40mm
focal length may look a little strange - 35mm and 50mm are more
common numbers to the majority of photographers - but Canon has
selected that for justification. Firstly it's comparatively simple to
style a little lens with this focal length for 35mm format SLRs,
which implies it joins a prominent line of streamlined 40mm primes
from the wants of Olympus, Pentax and Voigtlander. Secondly, many
photographers consider 40mm to get the 'perfect standard' lens on
complete body, providing an incredibly natural view to pictures.
The
40mm is the smallest EF lens Canon has made; it's simply 22mm (0.9\"
thick), and weighs about only 130g (4.6 ounces). It uses a current
craz for ultra compact 'pancake' primes that have been designed for
optimum portability, supporting consumers to take their camera with
them more of the full time. But despite its size Canon has
nonetheless managed to easily fit in a 6 element / 4 group optical
device which contains an aspherical element to reduce aberrations.
That makes it somewhat more complicated than its closest equivalent,
the Pentax smc DA 40mm F2.8 Limited which uses a 5 component / 4
group layout in a lighter, even slimmer body.
The 40mm is likewise an
affordable lens - truly at around GBP150 / $199, it's Canon's second
cheapest for SLRs. However, the elephant in the space is the fact
that one cheaper alternative - the EF 50mm f/1.8 II, which is half
the cost and offers significantly better light gathering capacity.
Yet another choice is the venerable EF 35mm f/2.0 - 1 of the first
lenses designed for the EOS system, although significantly more
costly. In this review we'll observe the 40mm compares to these
options.
Product Features:
- Ultra-slim and lightweight design
- Aspherical lens element delivers high image quality from the center to the periphery
- Advanced optical design enables a bright f/2.8, compact optical system at 40mm
- Optimized lens coatings ensure exceptional color balance while minimizing ghosting and flare
- Built-in stepping motor provides smooth and quiet autofocus when shooting video with Canon EOS Rebel T4i DSLR
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