Baader 35nm 2”

Use this section to discuss "standard" Baader/Coronado/ Lunt SolarView/ Daystar, etc… filters, cameras and scopes. No mods, just questions/ answers and reviews.
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Nik
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Baader 35nm 2”

Post by Nik »

I am currently using a 2” Astronomik L3 UV/IR filter as ERF before the quark (actually at the very beginning of the focuser) on my 127/1200 acro.

I was told bu a friend I should replace it or double stack it with a Baader 2” 35nm Ha filter for better protection

Before I buy the Baader I’d like an expert advice

I can’t put money in a 160mm frontal DERF
Thank you


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Re: Baader 35nm 2”

Post by Dennis »

Hi Nic,
the advice sounds reasonable. What exactly do you want to know?


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RodAstro
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Re: Baader 35nm 2”

Post by RodAstro »

Hi
I would say you should be ok with the UV/IR on a 127, I have used the same for the past two years on my 150.
It's only useful to protect the Quarks front blocking filter and make it last longer.
I bought a Baader 35nm 2" and found quite a loss of light so I don't use it for imaging as it slows the frame rate quite a bit, I only use it when the scope is tracking the sun for several hours.
Also mine is not very flat so softens the image a bit if I have it up the focuser where the 2" is well illuminated. The closer to focus the less effect a filter will have on the image so if you get one get a 1.25 one to screw on the nosepiece of the Quark and save some money.

The Baader front ERF, apparently the same coating as the 35nm, also calms the tube currents but because it is before the objective it has to be perfectly flat both sides and parallel about 1/10th wave to have little effect on the image, that's where the money is.

Cheers Rod


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Re: Baader 35nm 2”

Post by marktownley »

Yes, that will work.


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