Binoculars & Telescopes
Bresser Barlow Telescope Lens 5x 31.7 mm / 1.25 Inch 3-Element Design and Multi-Coated
Barlow lens for 5x the focal length Suitable for visual observation and photography 3-element design and multi-coated Magnification: 5x eyepiece clamping ring made of brass, eyepiece diameter: 1.25 inches Box contents: 1x Barlow lens
https://www.bizrate.co.uk/binoculars_telescopes/bresser-barlow-telescope-lens-5x-oid8580607529.html