• Built by Tokina for Vivitar
  • Focal Length: 35-105mm
  • Max Aperture: f/3.5
  • Min Aperture: f/16
  • Filter Size: 72mm
  • Minimum Normal Focus: 4.5 feet/1.4 meters
  • "Close Range" Minimum Distance: 11.4 inches/29 centimeters
  • Reproduction Ratio: 1:5
  • Length: 4 inches/10.1 centimeters
  • Weight: 24.7 ounces/700 grams

This is an interesting old Vivitar zoom lens. Built by Tokina. Pushing the zoom ring forward would enter a "Close Range" focusing mode where the zoom ring functioned to control a helical focusing unit that would disengage when the zoom ring was moved back to the "Zoom" setting.