Need advice on filters for my Nikon D810A

[gost]

I’ve been doing deep sky astrophotography on and off for twenty some years, mostly off recently, but now I’m really keen on getting back into this type of photography.

I just ordered a SW Esprit 100 with a SW flattener to use with my Nikon D810A camera. Recent years I’ve just visited dark sites with my Nikon and tele lenses, but now I’m would like to start doing some narrowband photography from my back yard (Bortle 6). My plan is to buy a cooled dedicated astro camera later on, but for now I will start using my D810A.

So, as for filters, I’ve been looking at the different Optolong filters and they look very interesting. I don’t want to invest to much money in a filter since my plan is to go mono (maybe next season) and will then buy narrowband filters for that camera. 

1) As for clip-on options for Nikon full frame, it doesn’t seem to be an L-extreme or L-enhance, just the L-Pro, right and L-Pro doesn’t seem to be the right choice for NB photography in light polluted area. Since I have access to fast telephoto lenses (600mm f/4 and 300mm f/2.8) it would be nice to be able to use the filter together with these lenses.

2) As for 2” filters, would you recommend L-extreme or L-enhance for my setup and location?

Thanks and clear skies!

Göran

[tooth_dr]

Would it be an option to buy one NB filter - Ha. The Baader 7nm filter works down to F2.8. If you buy it in 2” then it would be one less filter to worry about if you switch to mono?