Introduction

Sigma announces two new FishEye lenses, the 8mm F4 EX DG Circular and 15mm F2.8 EX DG Diagonal. The circular fisheye lens is used to produce circular images, creating vast distortion with an angle of view of 180° when attached to a full-frame digital or 35mm film SLR camera. This auto focus lens can be used for the scientific applications such as the solid angle measurements. Also supplied with the lens is a padded case and a gelatin filter holder.
Sigma 8mm F4 EX DG CIRCULAR FISHEYE
The Sigma Corporation is pleased to announce the launch of the new 8mm F4 EX DG CIRCULAR FISHEYE lens.This circular fisheye lens is used to produce circular images, creating vast distortion with an angle of view of 180° when attached to a full-frame digital or 35mm film SLR camera. This auto focus lens is equipped with a new multi-layer coating technology that reduces both flare and ghosting and ensures accurate color balance and high image quality for both film and digital SLR cameras. This lens can be used for the scientific applications such as the solid angle measurements of cloud distribution over the sky, the vegetation distribution of the forest, etc., due to the quantifiable angle/area relationship it produces. Also supplied with the lens is a fitted padded case and a gelatin filter holder at the rear, allowing the use of gelatin filters.
Features

• New multi-layer lens coating and lens design reduce flare and ghosting
• High image quality for film and digital SLR cameras
• Useful for academic/technical applications such as solid angle measurements
• Equipped with a gelatin filter holder at the rear

Specification

• Focal Length :8mm
• Minimum Aperture :F32
• Lens Construction :10 Elements in 6 Groups
• Angle of View :180 degree
• Number of Diaphragm Blades :5pcs
• Minimum Focusing Distance :20cm (7.8?)
• Maximum Magnification :1:13.9
• Filter Size :Rear (Gelatin filter)
• Dimensions :Diameter 73.5mm (2.8in) x Length 63mm (2.4in)
• Weight :320gr/11.2oz