AR2786 w/100mm scope

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Lowjiber
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AR2786 w/100mm scope

#1

Post by Lowjiber »


Over the holiday weekend, I continued to be mesmerized by AR2786. Here's one shot with a 100mm (f/9) scope... When combined with the Quark, that comes out at f/39. I just got around to processing it today.

Thanks for the peek.:)

Left-click for a better view...
AR2786-100mm.jpg
Clear Skies & Stay Safe
John (Urban Astronomer) Apertura AD10 Dob; XLT 150 Dob; XLT 120EQ; Lunt Solar 60 PT/B1200; ES AR102; SW Pro 100ED; 2 SW Pro 80ED's; 90mm Eq; WO Z-61; SW 90mm Virtuso Mak; 2 Orion ST-80's; Quark-C; Cams: Polemaster, ASI120MM-S, ASI174MM & ASI174MM-C
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Re: AR2786 w/100mm scope

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Post by Solsearcher »


Nice detail John , your sky must be improving out there
Solar scopes (Coronado Ha) 60mm double stack , 90mm double stack , 150mm single stack .
W/L scope Williams Optic Megrez 110mm / Lunt herschel wedge .
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Re: AR2786 w/100mm scope

#3

Post by Lowjiber »


Solsearcher wrote: Mon Nov 30, 2020 6:07 pm Nice detail John , your sky must be improving out there
It is indeed.:) We've got a few scattered, low clouds today, but seeing is 4.5/5 this morning at 1015hrs. I've rarely used the 100mm, as the seeing has to be at least 4/5.
John (Urban Astronomer) Apertura AD10 Dob; XLT 150 Dob; XLT 120EQ; Lunt Solar 60 PT/B1200; ES AR102; SW Pro 100ED; 2 SW Pro 80ED's; 90mm Eq; WO Z-61; SW 90mm Virtuso Mak; 2 Orion ST-80's; Quark-C; Cams: Polemaster, ASI120MM-S, ASI174MM & ASI174MM-C
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Re: AR2786 w/100mm scope

#4

Post by helicon »


Great shot John, love the detail you captured. Also, why would it be more difficult to use a 100mm scope as opposed to 50mm or 80mm?
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
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Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
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Re: AR2786 w/100mm scope

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Post by Lowjiber »


helicon wrote: Mon Nov 30, 2020 6:23 pm Great shot John, love the detail you captured. Also, why would it be more difficult to use a 100mm scope as opposed to 50mm or 80mm?
Michael, in the case of my "arsenal" of scopes to use with the Quark, my 100mm is an f/9 which when combined with the 4.3x internal barlow in the Quark can be a nightmare in poor seeing conditions... resulting in many dropped frames, etc. My other two (ED) scopes are: Z-61 (f/5.9) & SW 80mm (f/5). The little Z-61 is darn near impervious to degraded seeing up to a point, but its FOV is way too wide for anything short of a full disk.

So, with a Quark it is not the aperture, but the focal ratio that needs to be considered.:)
John (Urban Astronomer) Apertura AD10 Dob; XLT 150 Dob; XLT 120EQ; Lunt Solar 60 PT/B1200; ES AR102; SW Pro 100ED; 2 SW Pro 80ED's; 90mm Eq; WO Z-61; SW 90mm Virtuso Mak; 2 Orion ST-80's; Quark-C; Cams: Polemaster, ASI120MM-S, ASI174MM & ASI174MM-C
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Re: AR2786 w/100mm scope

#6

Post by messier 111 »


really spectacular the details, thx.
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Re: AR2786 w/100mm scope

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Post by helicon »


Lowjiber wrote: Mon Nov 30, 2020 9:09 pm
helicon wrote: Mon Nov 30, 2020 6:23 pm Great shot John, love the detail you captured. Also, why would it be more difficult to use a 100mm scope as opposed to 50mm or 80mm?
Michael, in the case of my "arsenal" of scopes to use with the Quark, my 100mm is an f/9 which when combined with the 4.3x internal barlow in the Quark can be a nightmare in poor seeing conditions... resulting in many dropped frames, etc. My other two (ED) scopes are: Z-61 (f/5.9) & SW 80mm (f/5). The little Z-61 is darn near impervious to degraded seeing up to a point, but its FOV is way too wide for anything short of a full disk.

So, with a Quark it is not the aperture, but the focal ratio that needs to be considered.:)
Ah-ha, thanks John! :)
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: AR2786 w/100mm scope

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Post by Ylem »


Nice, John :)
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Re: AR2786 w/100mm scope

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Post by Thefatkitty »


John, that's crazy; f/39!! I know the Quark comes with a built-in barlow, and from what I gather f/9 for a scope is the limit pretty much with these. Great detail; thanks for the share!

All the best,
Mark

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Re: AR2786 w/100mm scope

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Post by Solsearcher »


Thefatkitty wrote: Tue Dec 01, 2020 12:26 am John, that's crazy; f/39!! I know the Quark comes with a built-in barlow, and from what I gather f/9 for a scope is the limit pretty much with these. Great detail; thanks for the share!

All the best,
Mark , The Quark is most comfortable at or around F/32 , that is why they contain an onboard 4.3 barlow . The true limiting factor is the sky , because they are designed to operate at these long focal lengths conditions conditions become more critical . That is why many Quark owners quite often will have an arsenal of short tube frac's .
Solar scopes (Coronado Ha) 60mm double stack , 90mm double stack , 150mm single stack .
W/L scope Williams Optic Megrez 110mm / Lunt herschel wedge .
Night scope Celestron 9.25 XLT
Mounts HEQ6 , HEQ5 , Losmandy G8
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Re: AR2786 w/100mm scope

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Post by Lowjiber »


Solsearcher wrote: Tue Dec 01, 2020 3:05 am
Thefatkitty wrote: Tue Dec 01, 2020 12:26 am John, that's crazy; f/39!! I know the Quark comes with a built-in barlow, and from what I gather f/9 for a scope is the limit pretty much with these. Great detail; thanks for the share!

All the best,
Mark , The Quark is most comfortable at or around F/32 , that is why they contain an onboard 4.3 barlow . The true limiting factor is the sky , because they are designed to operate at these long focal lengths conditions conditions become more critical . That is why many Quark owners quite often will have an arsenal of short tube frac's .
When I was "gathering" scopes for use with the Quark, I looked at the range of focal ratios that DayStar recommended. Over 100mm aperture was going to require an ERF on the front end, so I picked the 100mm f/9 as the top of the range.

I have two ST-80's (f/5) that are fully tricked-out, so I took some shots with the Q on board. They worked well to give me an idea of what was going on with the strange filter. However, I wanted something a little longer an picked the WO Z-61 ED (f/5.9) for the bottom end of the range.

Then something in the middle focal ratio range was needed, so I bought an SW Pro ED 80mm (f/7.5) that was going to give me a "comfortable" f/32. That's my workhorse scope. (I liked that scope so much that I bought another one for a grab-n-go. :lol:)

Skywatcher focusers kinda suck for AP, so I tricked the 100mm out with a GSO 2" steel-shaft crayford and put a 2.5" Moonlite on the 80mm. All three of the scopes have a UV/IR-cut filter permanently installed as the first thing the light sees after entering the tube... The Z-61 really didn't need one, but better safe than sorry.:)

(I have eleven fracs. I guess that makes me a frac-head and a solar-head.:lol:)
John (Urban Astronomer) Apertura AD10 Dob; XLT 150 Dob; XLT 120EQ; Lunt Solar 60 PT/B1200; ES AR102; SW Pro 100ED; 2 SW Pro 80ED's; 90mm Eq; WO Z-61; SW 90mm Virtuso Mak; 2 Orion ST-80's; Quark-C; Cams: Polemaster, ASI120MM-S, ASI174MM & ASI174MM-C
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