Which 18 200 lens

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Expert services to keep your equipment working perfectly, enhance its imaging performance or repair it. Compact proportions with a powerful zoom range of 11x — make an ideal general-purpose zoom for photographers on the go. Great low-light performance is assured by a 4-stop Image Stabilizer. Designed to appeal to entry-level and advanced amateur users looking for a lens with an optical Image Stabilizer and large focal length range, it weighs just g and measures The lens offers 0.

High image quality has been assured with the addition of two high-precision aspheric lenses to correct aberration including curvature of field and distortion.

Chromatic aberration common in wide-angle shooting is also combated by the inclusion of two UD lenses, ensuring optimum image quality and corner-to-corner detail. Light transmission is improved and reflections are reduced to deliver clear, crisp images. Automatic panning detection ensures effective performance when tracking moving subjects and, as the IS system is based in the lens, results are visible through the viewfinder during framing.

Environmentally friendly lead-free glass is used throughout its construction. Megazooms offer focal lengths from wide angles down to the telephoto range and are thus the lens of choice for most situations.

As a result of their high level of flexibility, compact size and low weight, these lenses are particularly suitable for daily use as an all-round lens, as well as for vacations, activities requiring little baggage or for families with children and all their gear in tow.

LD Low Dispersion — Lens element for greater image sharpness and the correction of chromatic aberration. Your email address will not be published. Expect about 2. Increase the focal length to 35mm through mm and wide open aperture vignetting falls to a just-noticeable 1 stop or so. About 1. Strong CA Chromatic Aberration is present in the mid and peripheral image circle at 18mm.

The CA lessens until becoming negligible at 80mm, and then increases until modestly present again at mm. The C shows moderately strong barrel distortion, especially in the center of the frame, at 18mm.

By 28mm, pincushion distortion has set in. Moderate pincushion distortion remains present over the balance of the focal length range. With its rounded 7-blade aperture, the C creates average quality bokeh foreground and background blur quality. However, this is not the same AF implementation seen on Sigma's best lenses. Autofocusing is quiet as the motor name suggests, but the focus speed is relatively slow and FTM Full Time Manual focusing is not supported.

I often find a finger or two resting on the focus ring, trying to help stabilize this very light lens. Perhaps most important is that I found this lens' autofocus system to be both accurately calibrated and consistently accurate.

This lens internally focuses and the front-mount filter threads do not rotate with focusing. This lens is not close to parfocal — you will definitely want to re-focus after zooming in or out. The C's manual focus ring is smooth with a very light rotational resistance. That the ring is very small reflects the Sigma target market's lack of interest in manual focusing. With FTM not supported the focus ring does not spin freely , the focus distances can be printed directly on the lens barrel.

Also printed on the lens barrel are the maximum reproduction ratios available at the delineated zoom settings. While I am not a fan of designating a lens with a 0.

This lens is more-macro than its non-HSM predecessor, so I guess the name reflects this improvement. Let's take a look at a table of close-focusing specs for a group of at-least-somewhat similar lenses:. Find consumables for your business printer. Seamless transfer of images and movies from your Canon camera to your devices and web services.

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