I have both the 5mm TAK LE and a 5mm UO Ortho. The Ortho is noticeably brighter than the TAK with better contrast but, due to its very short eye-relief, is fatiguing to use. I bought the TAK LE as it appeared to strike a good compromise between eye-relief and weight at a decent price. Was trying to avoid another expensive 'glass grenade'. The TAK has been quite satisfactory. The small loss in brightness is easily tolerated on most planetary targets and the more comfortable eye-relief permits the object to be studied in a liesurely manner. The detail I've seen with one ep, I've seen with the other. As pointed out above the TAK barlows well, making it useful for splitting tight doubles. Have not noticed any color in the TAK, but wasn't specifically looking for it. As to drawbacks, its 10mm eye-relief is probably not sufficient for someone who wears eyeglasses.
I've used both eyepieces in a SV80/f9.4, a TV102 and an ETX125. Unable to offer a comparison with the Radian.
Bob Young
I've used both eyepieces in a SV80/f9.4, a TV102 and an ETX125. Unable to offer a comparison with the Radian.
Bob Young
