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主題: IDAS LPS-P2攝影用光害濾鏡 作者: 曹大貓咪 於 2010-03-18 19:49:00 IDAS 光害濾鏡 LPS-P2濾鏡 規格48mm 189美金. 去年12月底自美進口一批,現僅剩一個..新品.僅新台幣6000元.(不含運費85元).
老貓說明:簡單說,它是光害降低有效的著名濾鏡,可以將光害最重要的水銀燈和鈉離子燈有害光線去除,另外有名的MBT(Multi Band-pass Technology)可以將其它天體的單色色光,將其穿透到達相機中的CCD或底片...如散光星雲最重要的氫離子色光(hydrogen-alpha (Hα) emission line),它的主要頻譜在 656.28 nanometers.P2對它有極佳的透光率(90%). Wavelength (nm) Pass/Block Transmission 365 Block 6.5% max 405 Block 6.5% max Pass 60% min (avg) 436 Block 6.5% max Pass 92% min (avg) 546 Block 6.5% max Pass 75% min (avg) 590 Block 6.5% max Pass 75% min (avg) 623 Block 25% max Pass 80% min (avg) 主題: IDAS LPS P2 作者: undunk 於 2010-03-27 08:32:43 Hi, I have a Hutech IDAS LPS-V2 2". I use it for my CCD and DSLR. I do not image without it anymore. Its got good plotted transmission curves. By that I mean it allows enough of the important nm in for my imaging needs. I do not get any untowards reflection either.
There is some colour variation so I usually adjust the green channel to "normalise" the tones in post processing. I reach skyglow too quickly on my DSLR without it. |