Part 2. 器材概述 PENTAX的高階定位相機中,全片幅的K-1和K-1 ii,以及APS-C片幅的K-3 ii有內建GPS系統,其他型號則需要添購O-GPS1(小小一個幾十克重左右吧)裝在熱靴上方可使用GPS。使用的時候要在主選單中開啟天體追蹤,開啟GPS開關,定位並校正(初次使用需兩分鐘左右,成功定位過之後每次重開校正完大概只需要半分鐘)。轉盤轉至B快門模式,再透過按一下小綠按鈕來切換天體追蹤或者一般B快門模式即可。 相機本身會依照所使用的焦段來限制單次曝光時間,譬如55-300mm這顆APS-C鏡頭裝在K-1 ii上面拉到300mm時,系統強制最多可曝50秒。相較於它廠相機只能曝一兩秒,PENTAX內建的天體追蹤讓星野攝影的方便性有飛躍的提升。 -- 你用過超廣角鏡拍星系嗎XD Among high-end models of PENTAX, only K-1, K-1 ii, (FF) and K-3 ii (APS-C) are equipped with GPS. Other models should be paired with a small accessory called O-GPS1 mounted on the hot shoe. After turn on the GPS and astrotracer and calibrate, one can enjoy tracking stars. Don’t forget to press the green bottom to shift B mode to astrotracer mode. The camera will limit the maximal length of exposure according to the focal length. For example, a camera without astrotracer mounted with a 300 mm lens can go without star streaks in 1-2 seconds, but PENTAX makes it possible to shoot for up to 50 seconds in a single shot. For wide angle lenses, the limitation is up to 5 minutes. Now you can happily live without an equatorial mount, LOL. Have you ever shoot galaxies with an ultra-wide lens? XD --
北斗七星 The Big Dipper 大熊座Ursa Major M51A漩渦星系Messier 51 (The Whirlpool Galaxy) M101風車星系Messier 101 (The Pinwheel Galaxy) 24mm, F2.8, ISO 3200, 30sec, single shot PENTAX K-1 ii, DFA 24-70 內建天體追蹤模式 With astrotracer Taken in Nacpan beach, El Nido, Philippines. #PENTAX內建赤道儀 #Astrotracer #K1mk2 #DFA2470標準大光圈變焦鏡 #愛妮島 #Nacpan海灘 這幾張都是第一張的裁切,3640萬畫素裁起來很自在XD
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