Quote:
Originally Posted by tornado33
Thanks all
Good question, Gama and its because the narrowband filter doesn let in infra red light lower down in the spectrum, they recommend a uv/ir filter for full cut off, only allowing in the Ha light. My DSLR is modified to allow in all light as I chose the clear glass option on the sensor when I ordered it from Hutech so I can do dinfra red imaging if needed.
Heres a colour version, showing similar to what it looks like on the camera screen
Scott
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I had a look at the spetral response for this Baader filter, and it has IR cutoff up to 1180nm. Thats quite high. You wont get any IR higher from this as the sensor isnt sensitive to this spectrum area. So you wouldnt need it.
Unless my data on the Cmos sensor spectrum bandwidth is up the kaboo.