Instruct: Classify a review as either positive or negative.
Query: Doubles Magnification

I used this product for the first time last night and it lives up to it's promises of doubling magnification. I used it with a 25mm sirius plossl which gave the apparant image of a 12.5mm lens. Also I used it with the Orion highlight 10mm which gave a 5mm view (about the highest my 8" dob can handle). The barlow did not seem to cause any distortion or fuzziness that I could notice.Seems to be a very good barlow for a low price.