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Tamron AF 28-75mm f/2.8 SP XR ZL Di LD Aspherical (IF) for Canon Digital SLR Cameras Overview
SO) 28-75MM F2.8 XR DI F/CANON
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Tamron AF 28-75mm f/2.8 SP XR ZL Di LD Aspherical (IF) for Canon Digital SLR Cameras Features
- 28-75mm autofocus zoom lens with f/2.8 maximum aperture
- Designed to meet performance characteristics of digital SLR cameras
- Minimum focusing distance of 13 inches; rotation-type zoom
- Smaller and lighter than most fast zoom lenses; weighs 18 ounces
- Measures 2.9 inches in diameter and 3.6 inches long; 6-year warranty
Tamron AF 28-75mm f/2.8 SP XR ZL Di LD Aspherical (IF) for Canon Digital SLR Cameras Best Review
The Tamron AF 28-75mm f/2.8 delivers sharp pictures regardless of which focal length or aperture size you use.
Pros
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- Sharp Closeup and Portrait Shots
The lens is capable of capturing amazing details in closeup and portrait shots. I use an XSi with this lens and it unquestionably sharper (albeit only by a hair) than the kit lens (Canon EF-S 18-55mm f/3.5-5.6) that comes with my XSi.
- Constant f/2.8 F-Stop
I love the f/2.8 constant f-stop. It take most of my shots during my hikes. A wide open aperture is a definite plus because I take a lot of my shots (i) handheld (which necessitates a fast shutter speed to reduce handheld motion blur) and (ii) in lowlight conditions (which necessitates a wide open aperture such as f/2.8)
- Solid Build
The lens definitely has a good heft to it. It doesn’t have the light and plasticky feel of the Canon 18-55mm f/3.5-5.6.
Cons
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- Zoom Creep
The lens has pronounced zoom creep (which means the lens barrel extends under its own weight when the the camera is pointed downward). There is a zoom lock, but it’s for locking the barrel at the 28mm position only.
- Slightly Slow Autofocus
Like the kit lens of the XSi and T1i (Canon EF-S 18-55mm f/3.5-5.6), the lens has a little trouble autofocusing in lowlight conditions.
- No IS (Image Stabilization)
There is no image stabilization to counteract any potential handheld motion blur. You would have to compensate with a faster shutter speed. (The rule of thumb on shutter speeds is the shutter speed should be at least the reciprocal of the focal length. For example, if the focal length is set at 28mm, the shutter speed should be at least 1/28th of a second; if the focal length is set at 75mm, the shutter speed should be at least 1/75th of a second.)
The lack of IS is definitely a concern for handheld shots if you need greater depth of field (DOF means both the background and foreground are in relative focus), which is accomplished with a smaller aperture size (a smaller aperture translates into: less light to the sensor => the need for a slower shutter speed => potential handheld motion blur).
- Len Cap
The lens cap is a little tricky to put on the lens (you have to squeeze the spring-loaded sides first as you put it on the lens. Once on the lens, it doesn’t always stay on; mine sometimes pops off on its own while in the camera bag.
Zoom Range Considerations
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The 28-75mm is the focal length specification on a full frame camera, such as the 5D. But on a camera with a 1.6 crop sensor (e.g. the XSi, T1i, T2i, XT, XTi) the focal range is in effect 45-120mm (1.6 * 28 ~= 45 and 1.6 * 75 = 120). This lens would thus not be best suited for wide angle shots on a camera with a crop sensor — that’s an important consideration if you’re getting this lens for a camera with a crop sensor. Still, it is quite useful as a walk-around lens, especially if you’re primarily taking closeup shots.
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This lens is a good lowlight lens. The lack of image stabilization is compensated by its constant f/2.8 f-stop (which allows for a faster shutter speed to help reduce handheld motion blur). All in all, it’s an impressive lens that delivers very good image quality.
Tamron AF 28-75mm f/2.8 SP XR ZL Di LD Aspherical (IF) for Canon Digital SLR Cameras RelateItems
update Aug 11, 2010 13:26:14
