Reviewed by 1 customers
I use this in a variety of apochromatic and achromatic refractors ranging from 70mm to 152mm. Used for both astronomy and terrestrial viewing. It is simply the best 5mm eyepiece I ever put into any of those scopes. Even in an F/5.5 scope it still provides a flat field of view with excellent sharpness across the entire field. On planets the level of contrast and lack of reflections and ghosting is astonishing, especially considering the number of glass elements involved. Light transmission is extremely high and easily a match to any minimal glass eyepiece like an orthoscopic.