294MC + Dual NB filter question/poll

[Anthonyexmouth]

OK, 294mc owners, are any of you using a dual narrowband filter. I know there are issues with the L-Extreme and flats that are worked around with higher gain but trying to get an idea what people are using and how they are getting on. I plan to get a 26c later in the year but for now want a filter.

Sub £250 really so L-Extreme or under. 

[Adam J]

2 hours ago, Anthonyexmouth said:

OK, 294mc owners, are any of you using a dual narrowband filter. I know there are issues with the L-Extreme and flats that are worked around with higher gain but trying to get an idea what people are using and how they are getting on. I plan to get a 26c later in the year but for now want a filter.

Sub £250 really so L-Extreme or under. 

You will want 2 inch so that you can use it with the larger sensor later. 

The problem with flats is as much related to the Ha wavelength as anything else and so will likely still manifest in any duel narrow band filter, for that reason I would go with the L-Extreme or the IDAS NB1 filter if you want to reduce reflections. Either way you will still need to run it at gain 200 and not 120 unless you have a lucky copy of the 294mc pro (some do exist). 

Next step up is the Antlia or the L-Ultimate and they are outside your budget. 

Adam 

Edited February 7, 2023 by Adam J

[PadrePeace]

I have a 294MC which works a treat with the L-Extreme at 200 gain. Tried lots of things at 120g and it simply would not calibrate. All on a thread in this forum if you need detail. 

[Anthonyexmouth]

27 minutes ago, Adam J said:

You will want 2 inch so that you can use it with the larger sensor later. 

The problem with flats is as much related to the Ha wavelength as anything else and so will likely still manifest in any duel narrow band filter, for that reason I would go with the L-Extreme or the IDAS NB1 filter if you want to reduce reflections. Either way you will still need to run it at gain 200 and not 120 unless you have a lucky copy of the 294mc pro (some do exist). 

Next step up is the Antlia or the L-Ultimate and they are outside your budget. 

Adam 

Yeah, i'd be getting a 2" to drop into my filter drawer.