Minolta Af 20mm F/2.8

Minolta AF 20mm f/2.8

The Minolta AF 20mm f/2.8 is a manual focus lens designed and manufactured by Minolta Co., Ltd. for their autofocus SLR cameras.

Introduction

The Minolta AF 20mm f/2.8 is one of the most popular wide-angle lenses produced by Minolta. It was introduced in the late 1970s as a standard lens for various Minolta models, including the SR-T and SR-T 101 cameras.

Design and Features

The Minolta AF 20mm f/2.8 features a fixed focal length of 20mm, with a maximum aperture of f/2.8. The lens has a wide angle of view and is suitable for landscape, architecture, and interior photography.

• Lens mount: Minolta A-mount
• Filter size: 52mm
• Focal length: 20mm
• Aperture: f/2.8
• Maximum aperture diameter: 38mm
• Weight: approximately 140g

Optical Design and Construction

The Minolta AF 20mm f/2.8 uses a combination of elements, including three glass elements and two aspherical lenses, to achieve its wide-angle design.

The lens is constructed with an aluminum alloy barrel, and the aperture ring features a manual click-stop mechanism for precise control over exposure compensation.

History/Background

Minolta introduced the AF 20mm f/2.8 in the late 1970s, as part of their standard lens lineup for SLR cameras.

The lens gained popularity among photographers due to its wide angle and low-light capabilities.

During the 1980s and 1990s, the Minolta AF 20mm f/2.8 remained a staple in many professional photographers' collections, often paired with Minolta SLR cameras.

Key Concepts

The Minolta AF 20mm f/2.8 is an example of a manual focus lens, which requires the photographer to manually adjust the focus ring to achieve sharp images.

The lens features a wide aperture of f/2.8, making it suitable for low-light photography and creating a shallow depth of field effect.

Technical Details

The Minolta AF 20mm f/2.8 has a maximum aperture diameter of 38mm, and the lens weight is approximately 140g.

• Focal length: 20mm
• Aperture: f/2.8
• Magnification ratio: 5.6x
• Closest focusing distance: 35cm (13.8 inches)

Applications/Uses

The Minolta AF 20mm f/2.8 is suitable for a variety of applications, including:

• Landscape and architectural photography
• Interior and studio photography
• Low-light photography

Impact/Significance

The Minolta AF 20mm f/2.8 played an important role in the development of wide-angle lenses for SLR cameras.

Its popularity among professional photographers contributed to its iconic status within the photographic community.

Related Topics

The Minolta AF 20mm f/2.8 is related to other Minolta AF lenses, such as the Minolta AF 24mm f/2.8 and the Minolta AF 28mm f/2.8.

It also shares similarities with other wide-angle lenses from various manufacturers, including Canon and Nikon.