What is difference between Barlow and erecting eyepiece?
If you use a 2x Barlow lens with an eyepiece, the magnification doubles. In an astronomical telescope, the image is laterally transposed and/or upside down. This is unimportant for astronomical observing, but for terrestrial observing it is important. Erecting lenses provide an upright and true-sided image.
What does a 1.5 erecting eyepiece do?
In addition to that the erecting eyepiece enlarge the image by 1.5x, it turns the image around so that your telescope is also suitable for making observations at country level in order to observe birds, for example.
How does an erecting eyepiece work?
An erect image eyepiece is a series of prisms combined with eyepiece lenses designed to rotate the image from a telescope’s main optics by 180°. It’s most commonly used with the Newtonian reflector. It simply replaces whatever eyepiece you would normally use.
Why can I not see through my Barlow lens?
It just means you have no use for a 3x Barlow. You can easily test if this is your case by pointing your telescope at an object that is hard to miss (using only an eyepiece) like the Moon or even something on the ground. Remove the eyepiece and set it up in the Barlow.
Can I use a Barlow lens with any telescope?
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. 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.
What does a star diagonal do?
A star diagonal, erecting lens or diagonal mirror is an angled mirror or prism used in telescopes that allows viewing from a direction that is perpendicular to the usual eyepiece axis. It allows more convenient and comfortable viewing when the telescope is pointed at, or near the zenith (i.e. directly overhead).