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Message: <blockquote data-quote="brocknroller" data-source="post: 3269932" data-attributes="member: 665">From what an owner wrote in a review, you could use the Duovid like a zoom if you could get both barrels to move perfectly together since it focuses through the entire magnification range, but only has stops for both barrels at 8x and 12x. Lke zooms, you get a smaller FOV/AFOV at lower magnification than at higher magnification: 6.7* @ 8 = 53.6* AFOV; 5.1* @ 12x = 61.2* AFOV. Still better @ 8x than most zooms. At 37 ounces, you're paying for that extra glass. I would think these would be better suited for hunters than birders. And they are WAY out of HJC's price range although they cost no more than the current single power top offerings by the alphas, so if you can find a mint sample, you get two- two - two mint bins in one, like <a href="https://www.youtube.com/watch?v=hJzhmxNzZs0" target="_blank">Certs</a>. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /></blockquote>