Simply awesome performance for the price. The only reason I didn't give this gem a five star rating, was that I wish the screw had a bigger head. Awesome...worth every penny.
OPT has a real winner here branded under its own label. For quality and value, this diagonal cannot be beat. I was impressed by the solid construction, admirable fit and finish but most of all by its superb optical performance. I highly recommend this fine accessory.
i gave this diag.4.5 stars only becouse the mir. surface had a tiny spec on it but as far as viewing?it was a very fine piece that i would buy again as it was built like a work horse no cheep junk.