IDAS LPS-P2攝影用光害濾鏡

[曹大貓咪]

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)

[undunk]

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.