Well I finally got round to taking the plunge and converted my 6.5 x 50 xt to an extreme and wow the picture is amazing not to mention I can now make it roughly x18 mag for my big bore rifle when foxing well worth looking in to if you want more from the photon.
That's a 50 mm lens so it's about the same mag but a much clearer image the 135 mm lens is the 18x mag one just swap them over when it goes on the 22/250