Olympus ed 45mm f1.8 đánh giá năm 2024
Announced in the summer of 2011 and released in the autumn, the Olympus 45mm ƒ/1.8 m.Zuiko is a fast telephoto prime designed for the PEN series of digital camera. With its 2x crop factor, the equivalent field of view is 90mm, offering the opportunity for portrait shooting with a very thin depth of field. The lens is available now, with several optional accessories including a circular lens hood, for around $400. Sharpness The Olympus 45mm ƒ/1.8 m.Zuiko is a very sharp lens. Wide open at ƒ/1.8, the central region of the image is tack-sharp, with very light corner softness; there's not much difference in stopping down to ƒ/2, but by ƒ/2.8, the lens is as sharp as sharp gets. It's sharp all the way through to ƒ/16, where a slight hint of diffraction limiting is present, but it's still really sharp even at this aperture. At ƒ/22 there is only very slight softness across the frame. In short - this is really excellent performance for sharpness. Chromatic Aberration There is a light amount of chromatic aberration present in images shot at wide apertures - it's noticeable at ƒ/4 and below, mostly in the corners and only in areas of high contrast. The effect is magenta-blue fringing, and it's probably only visible by viewing 100% crops. By ƒ/5.6, the effect is almost negligible. Shading (''Vignetting'') Corner shading isn't really a factor for this lens - the only point it is even noteworthy is when the lens is used wide open at ƒ/1.8, where we note extreme corners that are a third of a stop darker than the center. In any other setting, corner shading is negligible. Distortion Distortion is also minimized in this lens, showing just -0.1% pincushion distortion in the corners; this really isn't a lot to write home about. Olympus E-P1, with 90mm f/1.8 m.Zuiko, shot at f/1.8. Love that bokeh. Autofocus Operation The Olympus 45mm ƒ/1.8 uses Olympus' MSC (Move-Still-Compatible) technology, making the lens fast and near-silent to autofocus; the lens focuses between close-focus and infinity in less than a second. Autofocus results can be overridden at any time by simply turning the focusing ring. Macro The lens does provides poor macro ability at best - at its close focusing distance of 50cm (around 20 inches) it provides only 0.11x magnification. Build Quality and Handling The Olympus 45mm ƒ/1.8 m.Zuiko looks like a metal lens, but in fact it's plastic with a bright silver finish; you won't miss the metal chassis as this keeps the bulk to a minimum (it's only 116 grams, just over 4 oz) and pairs nicely with the PEN camera. It's small enough that it can be slipped into a pocket when not in use. The lens uses 8 groups of 9 lens elements, including two E-HR (Extra-High Refractive index) elements in its design, as well as 7 circular blades to create the aperture (as well as smooth bokeh results). The lens features a metal mount and plastic 37mm filter threads, but does not have a distance scale, depth-of-field scale, or infrared index. The lens has only one control on it, the manual focus ring. The ring is plastic with thin ribs, about 5/8'' wide. The focus ring sits in the center of the lens and is very smooth to turn, yet stiff enough that it will stay where it is set. With its fly-by-wire focusing design, the lens does not have any stops on it to let the user know it has reached either its close-focusing distance or infinity distance. An interesting (and included) accessory is the DR-40 Decoration Ring: as Olympus states, the ring ''can be used to conceal surface irregularities on the hood mount at the front of the lens and create a sense of unity and coherence.'' Essentially, the lens hood is optional, and you can cover up the mounting points with a prettier ring that matches the finish of the lens. Removing the decoration ring exposes the bayonet mount for attaching the LH40B lens hood. The hood is a circular mount which can store reversed on the lens when not in use. As an optional accessory, it won't break the bank at $39. Alternatives Given the newer nature of the micro four-thirds system, there aren't yet (at the time of writing) a lot of alternatives to choose from. Olympus 50mm ƒ/2 Zuiko Digital Macro ~$500 With the MMF-2 adapter, one could mount this standard Olympus four-thirds lens onto a PEN camera. It's not really the same class of lens - the 50mm is a macro lens - so you're going to get much different performance, but a similar style of image. The 50mm tested very well, with excellent results for sharpness, CA, distortion and corner shading. Panasonic 45mm ƒ/2.8 ASPH MEGA OIS Leica DG MACRO-ELMARIT ~$900 We haven't yet tested this lens, but it will work with the PEN without an adapter, and will provide you with the same effective focal length, if not the fast aperture. Conclusion With excellent test results, this is a no-brainer of a conclusion - it's a great and inexpensive addition to your Olympus PEN kit, especially if you're a portrait shooter. Product Photos Sample Photos The VFA target should give you a good idea of sharpness in the center and corners, as well as some idea of the extent of barrel or pincushion distortion and chromatic aberration, while the Still Life subject may help in judging contrast and color. We shoot both images using the default JPEG settings and manual white balance of our test bodies, so the images should be quite consistent from lens to lens. As appropriate, we shoot these with both full-frame and sub-frame bodies, at a range of focal lengths, and at both maximum aperture and ƒ/8. For the ''VFA'' target (the viewfinder accuracy target from Imaging Resource), we also provide sample crops from the center and upper-left corner of each shot, so you can quickly get a sense of relative sharpness, without having to download and inspect the full-res images. To avoid space limitations with the layout of our review pages, indexes to the test shots launch in separate windows. Olympus45mm f/1.8 ED M.Zuiko DigitalOlympus 45mm f/1.8 ED M.Zuiko Digital User Reviews9.5/10average of 22 review(s) Build Quality8.5/10 Image Quality9.5/10
10 out of 10 pointsand recommended by kinematic (13 reviews) Light, compact, fast, gorgeous rendering No lens hood or protective pouch - focus by wire only This lens is fantastic! Gorgeous rendering that rivals other classic rangefinder glass like the Contax G Carl Zeiss T* Planar 45. Some comparison images found here: http://www.flickr.com/photos/kinematic/6197294278/in/photostream/ http://www.flickr.com/photos/kinematic/6196778705/in/photostream/ Overall I'm very impressed with this as a portrait lens, and kudos to Olympus for making such a fantastic lens that makes the Pen system very grown up. As a 5Dmk2 user as well, I find that this combination rivals the big camera well and works perfectly fine as a back-up system for any professional situation. Regardless of the depth of field equivalent of F/3.5 full frame, images speak a lot of words for it's shallow depth of field rendering: http://www.flickr.com/photos/kinematic/6183148494/in/photostream/ You don't have to work too hard to nail focus and also get lovely selective focus with this lens. Couple of things that I wish it had from it's sibling the 12mm F/2 is the snap focus feature (I think all Olympus lenses should have this feature now). But Olympus tried it's best to keep costs down so I respect that. However there is no excuse not to have a lens hood included and also a protective lens pouch. In the past I never used lenses pouches with my larger lenses, but with these smaller rangefinder like lenses, I put all my lenses into pouches before they go into my bag. This is one disappointment I have with Olympus which Panasonic is one step ahead with even their Leica lenses. Hood and Pouch should be included in the price of this. Lastly, the build quality of this isn't the same as the 12mm, however it's also half the price so it's hard to argue that. At the end of the day, this lens is just such a nice little portrait combination that it is easy to overlook it's plastic construction and lack of a physical focus ring. Certainly my favourite lens from Olympus thus far and look forward to more like these in the future. |