also wanted D-ERF

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DSO Dave
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also wanted D-ERF

Post by DSO Dave »

I've a Daystar ATM rear mount filter with the 2"mm red glass ERF.
Looking for a used D-ERF .

Mine measures 69mm and 2mm thick. the clear aperture is 64mm
I'd before considered a larger diameter filter , would need a cell to hold that.

Do not know how I would mount.
Would it be a job for a 3D printer?


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marktownley
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Re: also wanted D-ERF

Post by marktownley »

What size ERF?


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Re: also wanted D-ERF

Post by DSO Dave »

Excuse delay , took until now to find my post. Hope I pressed "thumbs up " last post.!
My measurements are wrong . 63mm hole in off axis cell . ERF 70 mm and 3mm thick.

I would ideally like D-ERF 70 mm that would fit the cell. there is mention of a 67mm D-erF on the board sold as used.
Long as it was a 60 mm or above D-ERF, could mask the gap of 63 mm hole cell. Still need to figure out a cell,

Would not want to go smaller diameter , the daytime seeing is superb this location . Want all the mm I can get.


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