Sigma 50-500mm f/4-6.3 EX DG HSM APO RF Telephoto Zoom Lens for Canon SLR Cameras Review

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(More customer reviews)The auto focus is super quiet and reasonably fast in most situations, although mounted on my D30 it does get confused in complex lighting. This is a BIG and HEAVY lens. I use the neck strap provided with the lens, as well as the strap on the camera at the same time. Although I'm probably overcautious, I don't trust the weight of the lens hanging from the camera without extra support. Mounted on a monopod, it is well balanced although following birds in flight presents a challenge. Optically, it's truly beautiful through all f stops. It looks like it will take any abuse I can reasonably give it, being solidly constructed and manufactured to very precise tolerances. I wanted a quality super telephoto and I got one at a great price.

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The Sigma APO 50-500mm f4-6.3 EX DG HSM Lens for Canon Digital SLR Cameras is a high-magnification zoom lens with a 10x zoom ratio. The advanced optical design of the lens is optimized for digital SLR cameras, and the super coating on each glass surface produces superb color rendition, while reducing flare and ghosting. This lens uses four pieces of Special Low Dispersion (SLD) glass for excellent correction of color aberration throughout the entire zoom range. The Hyper Sonic Motor (HSM) provides quiet high-speed AF function, as well as full-time manual focus capability. This lens also features a Zoom Lock device to eliminate "zoom creep" when the lens is tilted down. When the lens is set to the 50 millimeter focal length, it is remarkably compact and provides easy handling. The tripod mount is composed of magnesium, to minimize total weight. It is also easy to grip and carry the lens due to ergonomic design of the tripod mount. Non-rotating front lens elements, due to the rear focus mechanism, make possible the use of a custom bayonet "petal-type hood," which prevents extraneous light from degrading the image quality. This mechanism also allows the use of circular polarizing filters, since the front barrel does not rotate during focusing or zooming.

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Tamron AF 200-500mm f/5.0-6.3 Di LD SP FEC (IF) Lens for Canon Digital SLR Cameras Review

Average Reviews:

(More customer reviews)This new lens, part of the Di (designed for digital) initiative from Tamron is very well built - light and balances well in hand.
It compares nicely with much more costlier Canon 100-400 L IS and compliments perfectly 70-200 type of lenses to extend telephoto reach to incredible 800mm on 1.6x crop camera.
Very sharp even wide-open from 200mm to 400mm it starts to slightly lose its edge at 500mm but still is very respectable. AF is quick and not very noisy. The lens can be hand-hold in broad daylight but is best used either with monopod or a good tripod (especially if you shoot in dusk conditions). Attaching optional 1.4x extender would allow to bring subjects up to 24 times closer compared to bare eyesight and still get a very high quality shot.
From the drawbacks there is slight lack of contrast comparing to 'L' (professional) lenses from Canon and slow F/6.3 apperture at the tele-end, making AF sometimes difficult with cameras that are not designed for AF after F/5.6 (such as 20D or Digital Rebel). Putting extender or/and Polarizer filter on lens would cut light that reaches the camera another 2-3 times, making this lens very slow and forcing Manual Focusing. So if you need the speed at such extreme reach, better consider prime (non-zoom) lenses.
The filter size is 86mm making finding an affordable quality filter for this lens a practical impossibility. But if you do manage to get a decent polarizer filter, using it would be much simplier then with any other large lenses due to included filter attachment ring. With any other lens the hood would be blocking access to the filter but thanks to this simple gadget, Tamron 200-500 can be used successfully with both filter and hood on.


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L9) 200-500MM F5-6.3 DI F/CANON

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