Tamron AF 28-80mm f/3.5-5.6 Aspherical Lens for Pentax Digital SLR Cameras Review

Average Reviews:

(More customer reviews)This is what it is, which is why I gave it 4 stars. It's not a professional lens, but it works perfect for everyday amateur use. Nice focal range 28-80 (equivalent 42-120). Reasonable for anything indoors or fairly close, works as a portrait lens and does well with landscapes and architecture. Great general usage lens and compact as well. The price is really remarkable. I have 8 lenses and this one gets the most use. I have it mounted to a Pentax K20D

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The Tamron AF28-80mm f3.5-f5.6 is a standard zoom lens with a wide to medium telephoto range of 28-80mm, providing great range for nature and landscape photography or snapshots and home photography. By using aspherical elements in the front optical group, Tamron reduced the total number of elements required. They also used strong, engineered plastic for the barrel, making the total lens body only 8.4 ounces. These features make this lens extremely versatile and lightweight. This model is dedicated to Pentax AF SLR cameras.

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Sigma 17-70mm f/2.8-4.5 DC IF Macro Lens for Canon Digital SLR Cameras Review

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(More customer reviews)This is the first non-Canon lens I've purchased and the Sigma 17-70/2.8-4.5 DC surprised the hell me with its fine performance. Zoom range, speed, resolution, low Chromatic Abberation, fast/sure autofocus speed and solid build quality make this lens stand head and shoulders above the typical cheap Canon kit lens such as the terrible Canon EF 18-55/4.5-5.6. Plus the Sigma has 1:2.3 macro capabilities with very sharp results...AMAZING! I've read more and more reviews all over the Internet on this Sigma lens that praise its qualities. This lens will compete with Canon lenses costing two and 3 times as much (EF 17-40, EF 18-50/2.8, EF 16-35/2.8). The Sigma 17-70 is constructed with one SLD low-dispersion glass element which is responsible for its excellent lack of Chromatic Aberation. At this price I never expected that kind of quality. Highly recommended!

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Designed for Canon digital SLR cameras, the Sigma 17-70mm f/2.8-4.5 macro lens performs superbly even in relatively low light conditions, such as indoors or at dusk. The lens incorporates an inner focusing system that provides a fast autofocus speed while also preventing the front of the lens from rotating. This makes it particularly suitable for use with circular polarizing filters and petal-shaped lens hoods. The lens is also equipped with a zoom lock switch that eliminates "zoom creep" during transportation. And thanks to the special low dispersion (SLD) element and two aspherical elements, the lens corrects for all types of aberrations and produces a high level of optical performance throughout the entire zoom range. Other features include a minimum focusing distance of 7.9 inches, a maximum magnification ratio of 1:2.3, and a multilayer lens coating that reduces flare and ghosting. All Sigma lenses carry a one-year warranty.
Specifications
Focal length: 17-70mm
Maximum aperture: f/2.8-4.5
Lens construction: 15 elements in 12 groups
Angle of view: 72.4 to 20.2 degrees (Sigma SD format)
Number of diaphragm blades: 7
Minimum aperture: f/22
Minimum focusing distance: 7.9 inches
Maximum magnification: 1:2.3
Filter size: 72mm
Corresponding AF mounts: Canon
Dimensions: 3.1 inches in diameter and 3.2 inches long
Weight: 16.0 ounces
Warranty: 1 year

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Hoya HMC Haze UV(0) - Filter - UV - 52 mm Review

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(More customer reviews)Looking through it with the naked eye reveals no distortions or imperfections. This is a genuine multi-coated UV filter (test this by looking at a reflection of a light source on its surface: a perfect reflection indicates no coating, a dim reflection indicates a single coating, and a green reflection indicates multiple coatings). Multiple coatings yield greater light transmission through the glass, and less glare, but (and this affects all multi-coated filters from all companies) also pick up dust, fingerprints, and condensation very easily (just holding it on the metal ring with your fingers causes condensation from your perspiration).

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Absorbs the ultraviolet rays which often makes outdoor photographs hazy and indistinct. A muliti-purpose fine-weather filter for color as well as black and white films. Also serves as a permanent lens protector. HMC (Hoya Multi-Coating) These popular filters are renowned for their ability to minimise reflection at the filter surfaces which reduces flare and ghosting. The result is an average light transmission of over 97%, giving sharp contrast and well balanced color. HOYA HMC filters are recommended for enhancing the performance of today's multicoated lenses.

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