What is that eight slot for?

[Earl]

8 Filter slots with some wheels, once you have LRGB Ha,SII and OIII what goes in that last slot?

[swag72]

I thought about Hb or N at one stage.

[Earl]

I thought about Hb or N at one stage.

I Hear a But though is yours empty?

[AllanJ]

I've got the Atik EFW2 with 9 filter positions. Starting in position 2 I have LRGB then 4 narrowband including Hb, but in position 1 there is  a clear glass filter on the assumption that it is better that any dust gets onto that rather than an "in use" filters or the camera chip.

[Tinker1947]

Maybe for the occasion when you don't need a filter.....

[Earl]

I've got the Atik EFW2 with 9 filter positions. Starting in position 2 I have LRGB then 4 narrowband including Hb, but in position 1 there is  a clear glass filter on the assumption that it is better that any dust gets onto that rather than an "in use" filters or the camera chip.

I forgot about 9's sounds a fair setup.

[swag72]

I Hear a But though is yours empty?

Yes mine is empty - I'm not planning on filling it with anything!

[Earl]

my 8 slot wheel should be with me tomorrow

[DaveS]

I'm thinking Baader LRGB and Ha, SII, OIII, and Hb, or else go for broke (Litteraly?) with a full house of 3nm Astrodons.

[StuartJPP]

A Jaffa cake holder?

[steppenwolf]

I have both an 8 wheel (QSI) and a 9 wheel (Atik) and both are fully populated. LRGB Ha OIII SII and Hb in both plus a Hutech IDAS LP filter in the 9th slot of the Atik.

As for a Jaffa cake holder, surely the slot would be better served by the insertion of Mini Cheddar?

Sent from my iPhone from somewhere dark .....

[swag72]

Do you use the Hb much Steve?

[steppenwolf]

Hi Sara, only for certain objects - the Rosette and Dumbbell nebulae spring to mind but in fairness it is not used that much but it does contribute quite well to a limited number of objects.

Sent from my iPhone from somewhere dark .....

[ollypenrice]

Hb tends to trace the same gasses as Ha, only more faintly, but I can see Hb bringing a bit of colour variety to what are normally Ha dominated targets. 

You could always put a black disk in the slot in order to 'belt and braces' your dark-taking if doing them on the scope?

Olly

[gingergeek]

I don't yet have a SII as I was thinking of getting a NII filter instead and trying it on the crescent and dumbell for instance