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Author Topic: 7 na hydrogen alpha filter badda  (Read 302 times)

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Offline clive

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7 na hydrogen alpha filter badda
« on: 16:11:30, 29 January, 2018 »
hello guys   its going to be clear down west tonight  and id like to image ngc 2174 tghe monkey head nebula  very close to orion  i will be useing a hydrogen alpha  7 na  badda filter  but the moon is allmost full and its not far from my target will the ha filter block the moon out or is it to close the my target  i was thinking of 10 minute subs  cheers

Offline chris.bailey

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Re: 7 na hydrogen alpha filter badda
« Reply #1 on: 16:53:30, 29 January, 2018 »
94% moon at a 12 degree angular separation from your target...I would't. With a moon over about 50% I aim to be at least 45 degrees away and most of the time don't bother at all.

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Offline clive

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Re: 7 na hydrogen alpha filter badda
« Reply #2 on: 17:06:49, 29 January, 2018 »
Ok thanks chris i thought it be to bright and to close 

Offline Roger B

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Re: 7 na hydrogen alpha filter badda
« Reply #3 on: 17:45:18, 30 January, 2018 »

Although you wont get the contrast as you would with no moon,   you can still have a crack at it.  I have imaged with a 7Nm filter close to a full moon and still got an image.   


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Offline petevasey

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Re: 7 na hydrogen alpha filter badda
« Reply #4 on: 11:27:54, 31 January, 2018 »
I got a decent image at the end of November.  82% moon, but the target was 75 degrees from the Moon, and the sky was very clean.  I'd be inclined to wait a few more days if I were you.

Best of luck,

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Offline clive

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Re: 7 na hydrogen alpha filter badda
« Reply #5 on: 13:20:08, 31 January, 2018 »
Ok cheers lads


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