This Barlow lens required only a tiny tweak to the focus originally set using just our 17mm eyepiece. From this, we can adjust the position of the test optic and the reference sphere to obtain a perfectly calibrated system.

With the Barlow element you can move the focal plane further out, eliminating this problem in most cases. The Tri-Mag 3x Barlow is a simple design neatly finished in a black silk with a plain, mainly chrome, 1. Typical Barlows have a magnification of 2x and are composed of two or sometimes three elements in a single group, forming a negative lens. The Ostara Long Body 2x Achromatic Barlow lens doubles the magnification with any given eyepiece, without any noticeable loss in image quality.A barlow lens multiplies the telescopes focal length and the magnification for observations of the moon, planets or small deep sky objects. This lens produces a diverging ray of light which, as well as magnifying the view, moves the eyepiece’s exit pupil farther outwards, thereby increasing the eye relief.

We see it as our task and obligation not only to sell telescopes, but an individually assembled telescope system that will give you a lifetime of pleasure. Also can be used to attach your camera (with appropriate T-Ring) with or without the lens cell for astrophotography. This Barlow gave excellent views of Venus during moments of good seeing despite the planet’s low altitude. The most important factor in ensuring successful microscopic imaging is choosing the appropriate optics and camera for your application that gives you more data and higher image quality.For instance, the black Barlow cell screwed into the average length nosepiece of a standard push fit t-adapter will give around 1. The Celestron Universal Barlow and T-Adapter can also be used for prime focus photography, which means you use the telescope as a very big photographic lens. Its anti-marring brass compression ring is smooth and the internal micro-baffles, finished in a matt black, complete a well-thought-out design.

The Barlow is simply placed in your focuser or star diagonal before the eyepiece and will suit virtually any telescope that accepts 1. I have only used this Barlow a few times so far but it seemed to do a good job when I used it to observe Mars with good detail when the seeing allowed. We also like the brass compression ring that holds the eyepiece firmly in place and, unlike a screw, won't cause damage to eyepiece barrels.The built in T thread allows cameras to be attached with a T ring and will double the focal length of your telescopes increasing the image scale of your astro images. The RVO x3 barlow lens is a high quality fully multi coated lens with integrated t threads for attaching cameras directly to the top. Unlike traditional telescopes, the RASA design ingeniously places the imaging sensor at the front of the telescope tube, creating an ultra-fast f/2.

Please note that some telescopes, especially fast refractors and Newtonians, may not have enough focus travel to allow the photographic image to come to focus when used in prime focus mode. Due to their two lens design, these Barlow lenses provide a brilliant image quality for the whole visual field and are suitable for observations and photography.We placed double star Iota Orionis at the edge and were able to observe its companion without much efford. Celestron Solar Safe filter technology is GUARANTEED SAFE for direct solar observation and has been independently tested by SAI Global Assurance Services. The relevant camera brand specific T2 adapter mount will also be required to attach the camera body to this adapter. Insert the Barlow lens between the eyepiece and the telescope and you will double the magnification.