First narrowband filter

[Calzune]

Hi!

Im planning on buying my first narrowband filter and I think the best filter to start with is Ha. right?

But I have seen that there are dual and triband filters, are these a good option?

I think triband filter are a bit expensive so my budget is maybe just 1 or dualband filter.

Im using a dslr modded and in a couple of months im going to buy a ccd camera (color).

what are your thoughts and tips on my first filter?

 

[Calzune]

anyone?....

[tooth_dr]

Ha would be the most common 'first' NB filter.

The Ha will work well with your DSLR, the other ones not so much.

Using NB filters with a colour camera will always be a compromise, but having said that the results can still be excellent.

The DSLR will need a 2" filter, your new CCD might not need 2", depends on the sensor size.

You could buy a 12nm EOS clip in filter - they sell for £100 second hand.  Use that for now, then when you upgrade to a CCD, sell that filter and reassess your needs.

 

Thats my take on it!

Adam.

[Calzune]

Just now, tooth_dr said:

Ha would be the most common 'first' NB filter.

The Ha will work well with your DSLR, the other ones not so much.

Using NB filters with a colour camera will always be a compromise, but having said that the results can still be excellent.

The DSLR will need a 2" filter, your new CCD might not need 2", depends on the sensor size.

You could buy a 12nm EOS clip in filter - they sell for £100 second hand.  Use that for now, then when you upgrade to a CCD, sell that filter and reassess your needs.

 

Thats my take on it!

Adam.

okey thanks! I have seen that there are different nm values of the filters, 7nm 12 nm etc, whats the difference?

Im planning on buying the new ASI533MC and right now they will include a filter 1.25", does that mean that it will have the same image result with that filter vs 2" filter?

So in the future if im buying that camera I just need 1,25" filters and not 2"?

[Louis D]

The nm value is the passband width.  The narrower the better because more non-emission light is rejected increasing contrast.