The PE-RT Pipe is an easy to lay option, that can hold and maintain its shape with an oxygen barrier through the inner layer of PE-RT prevents the oxygen entering the system via the pipework. With their 12x magnification power, these binoculars offer substantial light gathering ability while remaining manageable for handheld observing.

My overall impression is that the Cometron 12x70s have with their Bak-4 glass prisms, have obvious limitations.

Consequently, I decided to give up on the Celestron binoculars and will replace the Cometron with something better, which won't be from Celestron.

The fixing sets with screws, eye screws and hooks provide the optimum solution for almost all applications.However, heavier binoculars can fatigue your arms when trying to hand-hold for longer periods of time. With up to 3 embedment depths, the UltraCut FBS II US allows for the same screw to be used for different component thicknesses.

The magnification factor, also known as "power", is listed as the first number given in a binocular's name, like 7 x 50, 8 x 40, etc. I had an Orion Mini Giant 9x63, for several months, very nice optics and great Japanese build quality, but [there's always a but !

Leaving you with confidence knowing you are making the right decision and one that is perfect for you and your goals of viewing the night sky! The Cometron's wide field of view lets you observe large areas of sky to easily locate your target object and then keep it in view.

The right optics showed a large coma at the left and top edges of the FOV; the rest of the right FOV was OK (Vega being fainter than Venus, which showed some coma when centered). If you are looking for a high-quality binocular, you will need to spend more on a pair of Roof binoculars than equal quality Porro’s. In near darkness, the 70mm binoculars almost seemed like night vision scopes and I saw lots of wildlife. Cross references, designation of type by vehicle manufacturers or competitors are for guidance only.The measurement is in millimeters and is taken from the last lens surface to the point beyond the eyepiece where all the rays of light come to focus and form a sharp image.