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Message: <blockquote data-quote="Tvc15_2000" data-source="post: 1727214" data-attributes="member: 4960">I am happy to report my HDs  (10x32)  have focused effortlessly and consistently  from temps of -10F/-29C while snowshoe backpacking in the Adriondacks. At temps of 107F/41C in the Utah desert and in the hot, high humidity of the Belize jungle.  Any comments about focus are about older models. The HD addressed the consumer comments. The Teflon disks made a difference!The BRs I had focused well in all weather also.  But there is an improvement in the HD focus in my opinion. The Leica literature (page 5 of the PDF attached) says:“Consistently smooth focusing – whatever the temperature The mechanicsfor the Ultravid HD focusing have been further refined. As a result, focusing is even smoother and remains free of play across the entire range. Optimized material pairings and gliding discs made from extremely tough, high-performance plastic are used. In cold conditions, the conventional greased focusing mechanisms sometimes only work with difficulty, and at higher temperatures theymove too freely. Furthermore, these focusing mechanisms can feel “sticky”, and at higher temperatures there is even the danger that grease can escape and run on the lens. With the optimized Leica focus, these risks have been eliminated. In the new Ultravid-HD models, it works practically without any lubricants. So even in extreme temperatures, it is always fully functional – with a constantly optimum degree of smoothness.”</blockquote>

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