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nobody

29 Dec 2016 18:51



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Din pozele secventiale la stele ale lui Catalin se poate observa o problema legata de temperatura care tinde sa-si revina (cat de cat) dupa un timp. Astfel de probleme pot apare si de la constructia mecanica care pare a nu fi compensata termic.

As I used it major for distance object, I used to think set it to infinity and all focusing problem will be solved. When I discovered that the focus ring can pass over the infinity mark, I even think my lens is faulty. After examined the manual, this is by design to compensate temperature change. if outside temperature is 20F degrees below inside, you need to let the lens cool for 30 min or so before it is usable. At temperatures near freezing stars take on weird shapes. Even after leaving the lens/camera out for an hour. Samyang a abandonat productia acestui model ( http://www.samyang-lens.co.uk/samyang-500mm-f63-mc-if-mirror-lens.html ), iar stocurile ramase au fost scoase la vanzare sub alte branduri: Vivitar, Opteka, Rokinon, Walimex, Bower, Pro-Optik ...