Tamron AF 18-270mm f/3.5-6.3 Di II VC LD Aspherical IF Macro Zoom Lens for Canon DSLR Cameras
Tamron AF 18-270mm f/3.5-6.3 Di II VC LD Aspherical IF Macro Zoom Lens for Canon DSLR Cameras
Camera shake can ruin your photos, particularly when taking telephoto shots or shooting in low light conditions. The Tamron 18-270mm f/3.5-6.3 macro zoom lens, however, fights camera shake with its state-of-the-art vibration compensation (VC) mechanism, which delivers blur-free handheld images for incredible results. The proprietary VC mechanism employs a three-coil system that moves the VC lens electromagnetically based on signals originating from the movement of three steel balls. The lens element that compensates for vibration is held in place by the balls, so there is little friction and the movement is quite smooth. The end result is a technology that makes it possible to create exceptional images at slower shutter speeds under conditions where a tripod used to be necessary. You can also use subject movement to good effect with the lens, bringing out the contrast between motion and stillness, or shoot without a flash to evoke the genuine atmosphere of the scene.
Tamron AF 18-270mm f/3.5-6.3 Di II VC LD Aspherical IF Macro Zoom Lens for Canon DSLR Cameras review
I’ve had mine for three weeks now and have taken several hundred pictures under a wide range of conditions. I read all the reviews here and on other sites, both for Canon and Nikon mounts before I made a purchase. I hope to compare and contrast my experiences with what I’ve read here and on other review sites. My camera body is a Canon XTi.
I read some reviews that complained of chromatic aberration (CA). Yes, there is some at the edges, at some focal lengths and apertures. If you look at the test results ([...]) you will see that the lens performs excellently at around f-6.7 to f-8. Almost no CA and excellent sharpness. This lens simply wants to run best at about f-8. So, I’ve taken to using my camera in Av mode at f-8 when I’m using this lens. Excellent results with no visible CA.
I read some reviews that complained of ’softness’ of the images in some situations. This is attributable to two issues. One is that if you let the camera program mode choose an aperture, you may get a very high number. At very high-number apertures (f-16+) the lens is limited in sharpness, not by any design fault, but by a basic law of physics. It’s near the diffraction limit for that aperture. The second issue is that at long focal lengths the adaptive multi-point auto-focus algorithms mess up. If you’re not watching carefully they may focus on a bush that’s 50 feet away leaving the landscape that you were trying to capture out of focus. Blame the camera and not the lens. What I’ve been doing is using spot focus at longer focal lengths. Focus lock on what is supposed to be in focus and then frame the scene. Do that, and run Av mode at f-8 so you don’t get high f-numbers, and ’softness’ will not be an issue.
I’ve read some complaints of slowness or inconsistency of focus. This seems to come mainly from Nikon owners. For me, it focuses very quickly and quietly under all lighting situations. No problems at all. I’ve taken it out on a dark night and pointed it at a star and had focus lock within two seconds. I think the issue is more related to the focus algorithms running in the microprocessor in the camera body than to the lens itself. With my Canon XTi, I couldn’t ask for better performance.
I’ve read complaints of ‘lens creep’. That’s the tendency of long-focal-length lenses to extend to their maximum focal length when hanging down, due to the weight of the front elements of the lens. Mine doesn’t do it, yet. This could develop in the future. I don’t expect it to be an issue, though. There’s a simple lug that can lock the lens at the short focal length for carrying. While shooting I tend to support the weight of the camera and lens with my hand on the lens, and use the other hand on the body to work the controls and point. So lens ‘lens creep’ would not be an issue.
I’ve read some complaints of inconsistent force on the zoom ring required to zoom through the entire range. That’s true. It does take a bit more force to zoom between the 70mm to about 120mm range. It’s noticeable, and I wish it wasn’t there, but I know why that is. Somewhere about 70mm the cams in the zoom mechanism go into a range where large amounts of extension occur with small zoom ring movement. While it’s not desirable, it’s also not at all a problem.
This lens is heavy, especially if you’re used to the kit 18-55 lens. You’ll get used to it and you’ll be delighted if you’re a Canon owner. If you’re a Nikon owner you may have issues with focus in low light.
All-in-all I’m quite happy with the purchase and I don’t hesitate to recommend this lens. But, to be really happy with it, you have to understand the compromises that are part of its design and how to work around them.
