Canon EF 50mm f/1.8 Lens Review/ Overview

Just a review :)

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Online Digital Photography Guide - Canon 550D DSLR Feature Overview

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The Canon 550D DSLR camera includes many significant improvements over the Canon 500D: Better HD motion video, an 18 Megapixel image sensor, and an improved metering system akin to that of the Canon 7D model.

The 18MP Image Sensor
Image quality of the new Canon 550D is superior to that of previous models - jumping from 12MP to 15MP and finally to an incredible18MP. Partnered with this is the company's latest DIGIC 4 image processor, and the final result is an incredible combination of processing speed, accuracy, and image resolution.

The iFCL Metering System
The Canon 550D incorporates the iFCL or Focus, Coloring and Luminance metering system. This system measures and analyses focus, color, and luminance data from 63 zones simultaneously which provides greatly enhanced metering accuracy and consistency over previous models of the line. This is also the same metering system which is used in the Canon 7D semi-professional camera.

The High Definition Motion Video
The 550D is much improved in the HD motion video department, as compared to the predecessor 500D especially when shooting at 720p and 1080p. A nice feature is full control over the frame rate which allows you to capture very fast moving images by manual adjustment of the frame rate.

The Low Light ISO Improvements
The 550D includes a standard ISO range of up to 6400. This range can be expanded up to 12800 for use in low light situations where it may not be allowed or desirable to use flash lighting. This increased ISO range along with the DIGIC 4 image processor makes for minimum graininess in the output image.

The New Movie Crop Feature - Standard Definition With The Same Lens
A new movie crop function lets you shoot motion video at standard definition with up to 7x effective zoom. This is done by using only the center area of the image sensor, and it is very handy for instances where you do not have time or may not wish to change lenses.

The Improved LCD Screen
Canon has improved the LCD screen on the 550D over that of previous models too. The screen size is still a very respectable 3 inches, but offers increased resolution and overall clarity which in turn allows you to better see important details in your images as you shoot. The result is better composition ability.

The Strong Product Line
Canon has made a great camera - the 500D - even better. And the new 550D is fully compatible with EF and EF-S series lenses so that your existing lenses may still be used. It is also compatible with the EX-Speedlite series of flash accessories. Add to this the features discussed above and the 550D becomes a very attractive & worthwhile upgrade.

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Canon SLR Lens Overview - EF-S 17mm - 85mm F-4.0-5.6 USM IS Image Stabilized Autofocus Zoom Lens

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The EF-S series of lenses, by Canon, are exceptional lenses applicable for Canon digital SLR cameras such as: the EOS 20D and Rebel models. Why? The key design feature aims to match the APS-C imaging sensor with the image circle. How? This matching objective is achieved by reducing distance between the rear of the lens and the focal plane, thus decreasing the size of the image circle.

The result? Canon's EF-S lenses are more efficient in terms of: weight and cost of wide-angle lenses while ensuring superior image quality, resolution and contrast at all focal lengths.

As a member of the EF-S family of lenses, the 17-85 F4 IS USM is a strong performing wide-angle to telephoto lens. Its list of features include: Image Stabilization for hand-held situations; and is optically optimized for the digital SLR camera; a ring-type USM designed for fast and silent auto focus. The full-time manual focus in AF mode is also a useful addition.

The EF-S 17-85mm f/4-5.6 IS USM lens provides a 5x zoom ratio and an angle of view equivalent to a 27-136mm lens on a 35mm camera. Also present in this lens is a glass-molded aspherical lens element with aspherical surfaces on both sides. The result, superb image quality through the full zoom range. The focusing distance is impressive at a distance of 12 inches at all focal lengths. Finally, the EF-S 17-85mm IS lens, when compared to the EF 28-135mm IS lens, is 5% shorter and 12% lighter, and accepts 67mm filters.

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