Minolta 100-300mm f/4.5-5.6 xi AF

Article Abstract:

The Minolta 100-300mm f4.5-5.6 xi AF, priced at $487, is easy to handle. The exclusion of distance, depth-of-field and focal-length measuring scales is a minor drawback. Flare appeared at f/16 at both 100mm and 200mm. At 300mm, the field curvature was abnormal, affecting 'image quality' from astigmatism.

Minolta 100-300mm f/4.5-5.6 xi AF (Lens)

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Tamron 70-210mm f/2.8 LD AF

Article Abstract:

The Tamron 70-210mm f/2.8 LD AF, priced at $1,399, produces sharp images. It is difficult, however, to focus manually. There is linear distortion which limits the lens' application for architectural photography. It lacks, also, a depth-of-field scale.

Tamron 70-210mm f/2.8 LD AF (Lens)

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Sigma 28-70mm f/2.8 AF

Article Abstract:

The Sigma 28-70mm f/2.8 AF zoom lens, priced at $497, is a high performance instrument with well-controlled flare at all apertures. In test results, there were signs of ghost images between the f/11 and f/22 apertures.

Sigma 28-70mm f/2.8 AF (Lens)

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