Budget 150mm ERF .... quark

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Solar B
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Budget 150mm ERF .... quark

Post by Solar B »

I am looking at obtaining an affordable ERF for the 150 ....

Currently using the baader 35nm which is effective ... but I can see turbulence from
within the ota as expected ... I guess I'm just after something to take the edge
of the heat to use in conjunction with the 35nm

Would something like this be any good ? ... any other ideas would be greatly appreciated.

http://www.amazon.co.jp/PENTAX-SMC-PFフィ ... _rhf_p_t_2

The link hasn't worked but is for a 150mm uv camera filter.

Brian


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Re: Budget 150mm ERF .... quark

Post by Solar-Cologne »

Hello,

which Baader ERF you mean ?
C-ERF or D-ERF ?
Theres a big different between.

sunny Greetings :D
Achim


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Re: Budget 150mm ERF .... quark

Post by marktownley »

I'm going to try the appropriate Kodak Safelight Filter as an ERF on my C8, it will act to keep some IR out of the tube, and then a hot mirror to send the UV back out from the EP end. Not sure how optically flat it will be, probably not very, but it's a project for next years season.


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Re: Budget 150mm ERF .... quark

Post by Solar-Cologne »

Hi Neo ?,

I know this Mod with inside ERF.
Yours is an older Baader C-ERF, and its the correct ERF for a PST-Mod, dark violett-red when you look through.
Why you use an additional B&W IR/UV-Cut ?

sunny Greetings :D
Achim


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Re: Budget 150mm ERF .... quark

Post by Solar-Cologne »

oh, thanks, now i understand it.... :D

A very good Idea, i will speak with Oliver Smie and Wolfgang Lille about this Combination.
Do You have filtering Curves about this ?

sunny Greetings :D
Achim


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