[En1gma (Robert)]

Hi All,

Just a quick clarification.

What sort of HA filter would I need if I want to do some HA Astro work with an unmodified Nikon D5000?. I was told that the camera would need to be modified to benefit from this as the sensor will block out < 12nm which makes the Baadar/astronomik filters useless.

Cheers
Rob.