Doublestack PST Mod + Quark

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Starry Jack
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Doublestack PST Mod + Quark

Post by Starry Jack » Tue Jun 02, 2020 10:58 pm

What is your optical train when you use the PST and Quark?

Specifically, do you use the BF on the mod? I just tried in 3 minutes time between THICK clouds:
152mm f6.5 to glasspath to PST Stage 2 Mod minues BF to Quark to 12nm to camera.

Hard to tell because of the soupy thick clouds, but I did achieve focus and could get an image.

I'll try again when the clouds are gone.

Thanks,


Explore Scientific 152mm f6.5 achromat
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
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marktownley
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Re: Doublestack PST Mod + Quark

Post by marktownley » Wed Jun 03, 2020 6:37 am

Nope, Naked PST etalon goes after the Quark and before the camera. Your way will put the Quark at f10, and while it will work will be getting dark I imagine.


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Re: Doublestack PST Mod + Quark

Post by Starry Jack » Wed Jun 03, 2020 6:15 pm

You're a smart cookie, Mark.
I did focus, but it was dark.

It was nice to get the PST Stage 2 Mod out again, but I was reminded how I really dislike tuning and dislike the sweet spot.

For tuning, I can never tell when I've hit the spot.

Thanks for the comments,
Jack


Explore Scientific 152mm f6.5 achromat
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation

Starry Jack
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Re: Doublestack PST Mod + Quark

Post by Starry Jack » Thu Jun 04, 2020 10:29 pm

Mark,
I cannot find a thread outlining a PST Etalon + Quark doublestack...do you know of one or of any placement/distance parameters?

Thanks,
Jack


Explore Scientific 152mm f6.5 achromat
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation

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