Ive used this barlow for a few months now and I can honestly state that it was a purchase well made. The fit and finish of this barlow is exceptional and its optics complement every EP Ive used with it. It even appears to be parfocal with most TeleVue Plossls. It has become a usefull addition to my collection and is used more often than not. Highly recommended...
This is a very well made 2 Big barlow which I have used over a long period of time for planetary use primarily. I have also recommended it to people with a limited number of eyepieces as a way to double your collection and still get a great 2 accessory in the process. I highly recommend this Barlow, without a doubt!