Lens canon 50mm f1.8 ii đánh giá

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Canon EF 50mm f/1.8 II - Review / Test Report

Lens Reviews - Canon EOS (APS-C)

Article Index Introduction Analysis Sample Images & Verdict

Page 1 of 3

Review by Klaus Schroiff, published June 2005

Special thanks to Markus Stamm for providing this lens!

Introduction

The Canon EF 50mm f/1.8 II is the very cheapest lens in the Canon line-up. In the APS-C DSLR scope the field-of-view resembles a 80mm lens here which qualifies it as an interesting portrait lens besides other purposes such as low-light photography. The lens features a conventional micro motor without full-time manual focusing. The AF speed feels pretty fast - there aren't really many elements to move around here. The lens uses a linear extension system for focusing (similar to extension tubes) so the length of the lens changes according to the focus distance. The front element does not rotate during focusing. The minimal focus distance is 0.45m resulting in a max. magnification of 0.15x (~1:7). Manual focusing feels Ok. The focus ring, positioned at the very front, is very narrow so it's not really convenient. The optical construction is made of just 6 elements in 5 groups without any special elements (not needed at this focal length). The lens features 5 aperture blades. The filter size is 52mm. At just 130g it is an ultra light-weight lens and with a dimension of 68x41mm it's also extremely compact. The build quality is sufficient to say it positive. The lens barrel is made of plastic down to the mount. All-in-all you feel the price tag here. That said there's little wobbling of the inner tube and unless you abuse it there're no reasons to believe that it'll not last.

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The Canon EF 50mm F1.8 II is the least expensive lens currently available for the EOS system, and has been in the lineup since late 1990. It's a simplified version of the original EF 50mm F1.8 of 1987 (often referred to as the 'Mark I') which was supplied as standard with some of Canon's earliest 35mm EOS SLRs; however it can trace its lineage back a lot further than that, as the company has been making 50mm F1.8 standard lenses since 1959. Like its predecessor, it uses simple symmetric Gaussian optics with six elements in five groups, in a well-proven formula which is known to offer excellent correction of aberrations.

Although designed as a 'standard' lens for 35mm film, these days the 50mm F1.8 is far more likely to be seen doing service on APS-C format DSLRs, on which it behaves like a short telephoto portrait lens (80mm equivalent). With its remarkably low (sub-$100) price, it tends to attract the interest of Canon SLR users looking to start experimenting with fast lenses for low light and shallow depth of field work, or simply hoping to get sharper results than those which can be provided by the kit lens bundled with the camera body. It's also a potential option for those seeking a near-disposable lens to use in adverse conditions.

Of course this isn't the only lens of its focal length in Canon's lineup, and potential buyers will often also be tempted by the EF 50mm F1.4 USM which we reviewed recently, despite its significantly higher price tag. So the question we'll be asking in this review is whether the slower lens offers such compelling value for money that it's an unmissable bargain, or if instead the inevitable compromises involved in hitting such a low price point are too much to tolerate.

Headline features

• 50mm focal length
• Fast F1.8 maximum aperture

Angle of view

The pictures below illustrate the angles of view on 35mm full frame and APS-C camera bodies:

50mm (35mm full-frame)50mm (APS-C; 80mm equivalent)

Canon EF 50mm F1.8 II specifications

Street price • $90 (US) • £90 (UK) Date introduced December 1990 Maximum format size 35mm full frame Focal length 50mm 35mm equivalent focal length (APS-C) 80mm Diagonal Angle of view (FF) 47º Diagonal Angle of view (APS-C) 31º Maximum aperture F1.8 Minimum aperture F22 Lens Construction • 6 elements / 5 groups Number of diaphragm blades 5 Minimum focus 0.45m (1.5 ft) Maximum magnification 0.15x AF motor type DC Micro Motor Focus method Unit focus Image stabilization • None Filter thread • 52mm • Does not rotate on focus Supplied accessories Front and rear caps Optional accessories ES-62 hood Weight 130g (4.6 oz) Dimensions 68.2mm diameter x 50.5mm length (2.7 x 2.0 in) Lens Mount Canon EF only

* Supplied accessories may differ in each country or area

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