2x BARLOW LENS 1.25" EYEPIECE TELESCOPE DOUBLE MAGNIFICATION x 2 STANDARD 1-1/4" For Sale
2x BARLOW LENS 1.25" EYEPIECE TELESCOPE DOUBLE MAGNIFICATION x 2 STANDARD 1-1/4":
STANDARD 2x BARLOW LENS FOR TELESCOPES 1.25" STANDARD FITTING DOUBLES YOUR MAGNIFICATION EASY TO FIT AND CHANGE AROUND COMPATABLE WITH ALL 1.25" STANDARD EYEPIECES AND TELESCOPES MULTICOATED HIGH QUALITY LENSES EXCELLENT VALUE AND GOOD QUALITY OPTICAL PROPERTIES AT A LOW PRICE WHAT IS A BARLOW LENS (NO NEED TO READ THIS IF YOU KNOW ALREADY). A barlow lens is an extremely useful tool and every amateur astronomer should have a Barlow Lens. The Barlow lens was invented by Peter Barlow (1776-1862) an English writer on pure and applied mathematics. A Barlow lens is a concave lens that when placed between a telescopes objective lens or mirror and the eyepiece, will increase the magnification of the telescope. A Barlow lens connects directly to your eyepiece. The most common and popular Barlow is the 2x Barlow. A 2x Barlow will double the magnification of the eyepiece it is attached to. For example, if you were using a 20mm eyepiece on a telescope with a 1000mm focal length, you would have 50x magnification. If you attach a 2x Barlow lens to that eyepiece you will double the effective magnification of that eyepiece to 100x. One of the greatest advantages of a Barlow lens is that it not only will double the magnification – it will effectively double your eyepiece collection! If you had a 32mm 26mm and 10mm for example, adding a 2x Barlow would be like owning a 32mm 26mm 16mm 13mm and 5mm. A Barlow is much more cost effective, as it is usually less than the price of 1 eyepiece! Choosing a Barlow Lens When selecting a Barlow lens it is critical that you select one with a barrel size that will fit the eyepieces you are going to use it with. The barrel size is the diameter of the eyepiece tube that fits into the focuser. The standard eyepiece barrel size is 1-1/4 Inches. Some eyepieces use the larger 2-inch format and some really cheap telescopes use the smaller 0.965” format. It is important that your Barlow lens has the same barrel size as the eyepiece you are going to connect it to. Barlow lenses are offered in different magnifications. The most common is 2x. This means it will double the magnification of any eyepiece it is connected to. There are also 3x or higher Barlow lenses. We recommend the standard and most common 2x Barlow lens for most users. The more powerful Barlow's may not work well with all telescopes. Using a Barlow Lens A Barlow lens is very simple to use. Instead of dropping the eyepiece into the focuser, you will first drop in the Barlow lens, then your eyepiece will connect to your Barlow. WE ALSO STOCK A 3x VERSION BUT THE 2x IS THE MOST COMMONLY USED. Thank you for your interest in our item. Our small British family business is based in the East Midlands, UK and is fully VAT and tax registered in the UK. We are proud to contribute to the British economy. We employ local people and purchase all our stock and packaging materials from UK suppliers, although inevitably some stock is manufactured overseas and cannot be sourced from local manufacturers. We aim to be as environmentally friendly as possible, with our main waste (empty cardboard boxes and pallets) being re-used or recycled rather than being sent to landfill. To buy any item, select the required quantity and click ‘Buy Now’. Purchases made using PayPal will be despatched within 1 working day of the date of purchase. We are confident you will be highly satisfied with your purchase. Any queries please email, we are here to help.