Opteka 500-1000mm f/8 High Definition Preset Telephoto Lens for Pentax DSLR Cameras

May 19, 2013 § Leave a comment

  • f/8, High-index / low-dispersion optical glass, Fully multi-coated, every element, Anti-reflection coating
  • Designed to maximize day and night shots by providing maximum light and image transmission with minimum distortion, Fantastic for all types of photographic situations
  • Great for the wildlife or nature photographer who wants to be hidden while taking photos of the subject
  • 500mm Preset Lens, Carrying bag, and lens caps included!
  • May be combined with the Opteka 2X Multiplier for 1000mm Zoom (Sold separately – Amazon Item Code: B000JSZ41S)

An Opteka High Definition 500mm preset telephoto lens incorporates not only computer optical design, but also the latest optical multi-coating techniques. The process of multi-coating assures virtually flare free photographs even under adverse lighting conditions resulting in crisp, high contrast pictures.

Preset Lenses are designed to retain a full range of exposure, automation and metering capabilities of the cameras on which they are mounted. This lens is great for nature and sports photography. The amazing power of this lens gives you the equivalent of looking through a pair of 10x power binoculars. It has a manual preset diaphragm, a rotating tripod mounting collar and a soft lens pouch.

Advances in high-index / low-dispersion optical glasses, new barrel materials, and exotic anti-reflection coatings, along with the latest in computer-aided-design / computer-aided-manufacturing, are combined to produce lenses of unprecedented quality. Diamond-cut from crystal-clear, water-white optical glass, Opteka lenses are ground and polished to a precise precision.

Specifications
Filter Size: 67mm
f/Stop Range: f/8.0 (fixed)
Minimum Focus Distance: 33.0′ (10.0 m)
Angle of View: 4.1° x 2.7° (WxH)
Groups/Elements: 4/4
Length: 11.7″ (297mm)
Maximum Diameter: 2.8″ (71mm)
Weight: 1.41 lbs (640g)
Included Items
~ Opteka 500mm f/8 Telephoto Preset Lens
~ T-Mount Lens Adapter
~ Lens Caps
~ Lens Pouch
~ 10 Year Warranty

Zeiss Ikon Viewfinder ZI-21 for the Biogon T* 21mm f/2.8 ZM Series Lens

May 19, 2013 § Leave a comment

    Unlike 35 mm SLR camera viewfinders, that can only show little more than 90% of what will be recorded on film, the Zeiss Ikon Viewfinder lets you see the area that surrounds the actual image giving you greater possibilities and confidence as you compose each image. Whats more, the triangulation rangefinder combined with a viewfinder base that is the widest available means that you can expect extreme accuracy and wide-angle focusing precision.

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