The Baader DSLR Conversion Filter 7-40-50-60-400-450-500-550-600-1000-1100D replaces the internal filter and passes Ha very efficiently.
Canon Digital SLR cameras are amongst the most popular cameras for astro-imaging. They do not require a computer, are very sensitive and have high resolution.
The cameras do have one major drawback for astro-imaging though. The original IR cut filter installed has poor transmission of the important H-Alpha line. Nebulae are consequently difficult to photograph with a standard camera.
Baader have made an IR cut filter that replaces the standard internal Canon filter. This filter has high transmission of the H-Alpha line and eliminates the cameras’ major disadvantage for astro-imaging.
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