Lunt with PST mod

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highfnum
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Lunt with PST mod

Post by highfnum »

tried PST with Lunt
similar to Quark PST mod
not as easy or as productive
but there was some effect
focus distance issues
needed 1.5 barlow
quark - pst better
but i tried!
luntpstscoper.jpg
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marktownley
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Re: Lunt with PST mod

Post by marktownley »

Always worth trying!


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Valery
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Re: Lunt with PST mod

Post by Valery »

I'd would suggest the following configuration for such a DS mod.

Lunt -> 2x Barlow -> BF1200 -> Televue PM2.5x telecentric --> PST (without it's optics) --> eyepiece or camera with Focal reducer 0,7x for IMX174 chip.
May be Meade 3x Telecentric instead of TV PM2.5x but then reducer must be 0.5x-0.6x.

It is possible to change the F/D (and the scale) by using different space in 2x barlow before telecentric.

Must work. I have done this many times with excellent results.

Also, a b/w camera is a must. Any color camera will destroy the results.


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Re: Lunt with PST mod

Post by highfnum »

thx
i kind of figured it was a F/D issue
ill retry again


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