4 replies to this topic

[svjim]

I realize that imaging the Blue Horsehead nebula will be challenging. I am in a 6/7 bortle area. I want to be able to emphasize the blue in the nebula. I have the L-Pro, L-Ultimate, and the Askar D2 filter and I wonder which one would be better for emphasizing the blue and what a minimum exposure time would be with my F5.6 Askar FRA400? 

 

Thanks Jim

[danny1976]

The Blue Horsehead is a reflection nebula so no narrowband filter. I don't think you can get good results from a Bortle 6/7 area. It's also probably low on the horizon which makes it even more challenging.

Edited by danny1976, 07 June 2025 - 02:00 PM.

[dac4215]

I am currently imaging it now, when clouds allow. I am in a Bortle 6/7 area using an askar fma180 and asi533mc. The only filter that I am using is an ir/uv. The BHH sets low in the sky for me, and I found that 60s exposures work pretty well. I thought about going longer, but afraid of stronger gradients. This is what I have so far with about 8 hours and rough processing. Need to get more time.

Edited by dac4215, 07 June 2025 - 02:09 PM.

[imtl]

No filter besides UV-IR cut. L-pro is not a filter, it's a waste of money and imaging time.

Edited by imtl, 07 June 2025 - 02:53 PM.

[smiller]

+1 on no filter for reflection nebula even from B6/7.