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Transit of Mercury in the Spicule Layer. Phil took this great image with his Quantum 6 Scope, Solar Spectrum etalon and PGR Camera.

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Quark Combo at low focal lengths

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Starry Jack
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Quark Combo at low focal lengths

Post by Starry Jack » Wed Jul 17, 2019 1:43 pm

With my f6.5 achromat and Aeties D-ERF Daystar recommends I use the quark classic with the 4.2x Barlow. But that much magnification scares me a bit. How about I get the quark combo and a 2.5x powermate and or also a 5x powermate for flexibility. Or I could use a focal reducer for the classic.

Does the quark perform well at f16.5 (combo with 2.5) and f26 (classic with a focal reducer)? Daystar says they like around the f30-40 range.

I am thinking of the 1.25" powermates only because I might be able to use the 2.5x in the 4" Mak for flexibility (I would transferring my D-ERF to that scope during those sessions).

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)
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Merlin66
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Re: Quark Combo at low focal lengths

Post by Merlin66 » Wed Jul 17, 2019 4:47 pm

Jack,
Don’t over think the issues....
Just go for the Chromo standard Quark, use it with your achromat with a suitable ERF and enjoy!!
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"Imaging Sunlight - using a digital spectroheliograph" - Springer

Starry Jack
Im an EXPERT!
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Re: Quark Combo at low focal lengths

Post by Starry Jack » Wed Jul 17, 2019 5:31 pm

Hahahahahahaha! You've noticed that have you? It's a disease I tell you, a disease!!!

That is very sage advice.
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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marktownley
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Re: Quark Combo at low focal lengths

Post by marktownley » Wed Jul 17, 2019 7:46 pm

Starry Jack wrote:
Wed Jul 17, 2019 1:43 pm

Does the quark perform well at f16.5 (combo with 2.5) and f26 (classic with a focal reducer)? Daystar says they like around the f30-40 range.
Go with what Daystar says, don't over complicate it! I'd get the Quark with the built in 4.2x telecentric.
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

Starry Jack
Im an EXPERT!
Im an EXPERT!
Posts: 380
Joined: Tue Feb 03, 2015 3:44 pm

Re: Quark Combo at low focal lengths

Post by Starry Jack » Wed Jul 17, 2019 7:50 pm

Agreed. Thank you.
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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marktownley
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Re: Quark Combo at low focal lengths

Post by marktownley » Wed Jul 17, 2019 7:53 pm

If you want a bit more contrast just stop the aperture of your scope down a bit.
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!


Starry Jack
Im an EXPERT!
Im an EXPERT!
Posts: 380
Joined: Tue Feb 03, 2015 3:44 pm

Re: Quark Combo at low focal lengths

Post by Starry Jack » Wed Jul 17, 2019 9:11 pm

Yippee!
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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