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  1. #1
    bikerdib's Avatar
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    Default Another scope to the collection?



    As you will see from my signature I have a few scopes. I've been thinking about adding a Celestron C11. I am not into the AP part of the hobby just doing visual. I may get into AP at some point but it's not currently in the plans. I'm thinking the longer focal length of the C11 would add to the views I currently get. While not a major investment dollar wise it will still be a pretty good chunk of change by the time I add a mount capable of handling the 11" SC tube (thinking either the Orion Atlas EQ-G or Celestron CGEM). Please convince me one way or the other, will it be a worthwhile addition or will it actually just overlap the current scopes I have.
    Dennis. ~ 45 years of astronomy and not giving up anytime soon!
    Explore Scientific 16" truss DOB; Explore Scientific 152mm carbon fiber triplet w/3" Feathertouch; ES 80mm triplet; Apertura 10" DOB w/tweeker's; Celestron 9.25" Edge; Celestron Edge 14" with Feathertouch; Celestron CGE Pro mount; Celestron AVX mount with ADM "D" saddle; QHY Polemaster; and my first, a Sears 60mm F/11 doublet; ZWO ASI294MC-Cool; ES field flattener; ES 3" flattener/FR; Televue 0.8 field flattener/FR; lots of TV and ES eyepieces; Lunt solar wedge with Celestron XLT 102

  2. #2
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    Default Re: Another scope to the collection?

    Let me be more specific with my question. Since I have the 10" Newt, would the C11 really add that much to what I see while viewing. I'd like some input from someone that has experience with both a 10" newt and a 11" SC.
    Dennis. ~ 45 years of astronomy and not giving up anytime soon!
    Explore Scientific 16" truss DOB; Explore Scientific 152mm carbon fiber triplet w/3" Feathertouch; ES 80mm triplet; Apertura 10" DOB w/tweeker's; Celestron 9.25" Edge; Celestron Edge 14" with Feathertouch; Celestron CGE Pro mount; Celestron AVX mount with ADM "D" saddle; QHY Polemaster; and my first, a Sears 60mm F/11 doublet; ZWO ASI294MC-Cool; ES field flattener; ES 3" flattener/FR; Televue 0.8 field flattener/FR; lots of TV and ES eyepieces; Lunt solar wedge with Celestron XLT 102

  3. #3
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    Default Re: Another scope to the collection?

    YES !!! The C11 is a completely different beast than a 10" Newt because of the longer focal length. They are a great choice for planetary visual or AP. Even used they don't come cheap but are great scopes.
    Mark
    Celestron: C11 ~ C8 Orange ~ Celestar 8 ~ CR150HD6 ~ C5 Orange ~ Comet Catcher ~ Firstscope 114
    Meade: Starfinder 10eq ~ AS80
    Imaging: ZWO ASI120MC ~ ZWO ASI224MC ~ ZWO ADC ~ Canon T3i ~ Meade OAG
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  4. #4
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    Default Re: Another scope to the collection?

    That's my thinking Mark. I know that the longer focal length will be a different experience than my 10" newt. Is yours fastar ready? I'm looking at a used one on another astronomy forum that is. I know about the fastar benefit for AP but does it have any negatives for visual?
    Dennis. ~ 45 years of astronomy and not giving up anytime soon!
    Explore Scientific 16" truss DOB; Explore Scientific 152mm carbon fiber triplet w/3" Feathertouch; ES 80mm triplet; Apertura 10" DOB w/tweeker's; Celestron 9.25" Edge; Celestron Edge 14" with Feathertouch; Celestron CGE Pro mount; Celestron AVX mount with ADM "D" saddle; QHY Polemaster; and my first, a Sears 60mm F/11 doublet; ZWO ASI294MC-Cool; ES field flattener; ES 3" flattener/FR; Televue 0.8 field flattener/FR; lots of TV and ES eyepieces; Lunt solar wedge with Celestron XLT 102

  5. #5
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    Default Re: Another scope to the collection?

    I don't have Fastar but Fastar has no effect on visual use.
    Mark
    Celestron: C11 ~ C8 Orange ~ Celestar 8 ~ CR150HD6 ~ C5 Orange ~ Comet Catcher ~ Firstscope 114
    Meade: Starfinder 10eq ~ AS80
    Imaging: ZWO ASI120MC ~ ZWO ASI224MC ~ ZWO ADC ~ Canon T3i ~ Meade OAG
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  6. #6
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    Default Re: Another scope to the collection?

    I think A C11 will complement your collection well, as currently you don't have anything anywhere near the 1280mm FL (alot larger magnification & narrower view) of the C11. I would consider the Celestron CGEM DX mount as opposed to either Orion Atlas EQ-G or Celestron CGEM mount. Beside the 10lbs more imaging payload capacity, the tripod on the CGEM DX puts the tripods of both the Orion Atlas EQ-G and Celestron CGEM to shame. The Celestron CGEM DX tripod is much more sturdier and robust by a huge margin. Also, the thicker and heavier counterweight bar of the CGEM DX, together with closer positioning of the counterweight itself to the mount, result in less bar flexing during tracking and slewing. All of these factors works to keep vibration to a smaller level compared to either the EQ-G or CGEM.

    I'm kinda like you - adding scopes to my collection, except that I'm going the other way, compares to you. I got the CGEM DX 1100 HD, and just recently got a 10" (1270mm focal length, f/5) newtonian w/rotating rings on tracking GEM mount, so similar to your AD10 for FL and aperture, but not the mount part.

  7. #7
    bikerdib's Avatar
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    Default Re: Another scope to the collection?

    What mount are you using for that f5 newt? Rotating rings would/are a must IMO.
    Dennis. ~ 45 years of astronomy and not giving up anytime soon!
    Explore Scientific 16" truss DOB; Explore Scientific 152mm carbon fiber triplet w/3" Feathertouch; ES 80mm triplet; Apertura 10" DOB w/tweeker's; Celestron 9.25" Edge; Celestron Edge 14" with Feathertouch; Celestron CGE Pro mount; Celestron AVX mount with ADM "D" saddle; QHY Polemaster; and my first, a Sears 60mm F/11 doublet; ZWO ASI294MC-Cool; ES field flattener; ES 3" flattener/FR; Televue 0.8 field flattener/FR; lots of TV and ES eyepieces; Lunt solar wedge with Celestron XLT 102

  8. #8
    orion999's Avatar
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    Default Re: Another scope to the collection?

    Correction to a typo in my post above: C11 FL is "2800mm", and not "1280mm."

    Quote Originally Posted by bikerdib View Post
    What mount are you using for that f5 newt? Rotating rings would/are a must IMO.
    My mount is a Parks GEM mobile dual-axis tracking pier. Yes, professionally-made rotating rings using metal tracks attached to the OTA are a must-have for a larger aperture newt mounted on a GEM, and I would not buy a newt without one.

    How's your EQ-TECH tracking platform working for dob? I had a 10" dob as well, but sold it before I bought my 10 newt.

  9. #9
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    Default Re: Another scope to the collection?

    IMO, the tracking platform made the scope usable at higher powers. I don't usually use it when chasing deep space objects because I like to use my setting circle plus I generally don't use high power on deep space objects. I made myself a leveling base that I use under the DOB base because I didn't like the flimsy leveling feet they sell for the Aperatura. Since when using the setting circle the DOB base must be level, I have to stack the tracking platform on the leveling platform and then the DOB base on top of the tracking platform. I have tried using the leveling platform to level the top of the tracking platform in the start position and it worked because I could go right to an object using the setting circle but stacking 3 different platforms added too much shake when focusing.

    I used the tracking platform while viewing Jupiter a couple of nights ago with a friend and it kept Jupiter pretty centered in the eyepiece even when using my TV 8mm plossl (the most power we could use due to seeing). I could center Jupiter and step away from the scope while he came over and sat in the observing chair and still observe for quite a while till the scope needed just a little nudge to center Jupiter again. I think the only reason it didn't keep it perfectly centered is because I didn't spend a lot of time adjusting the speed of the tracking platform.
    Dennis. ~ 45 years of astronomy and not giving up anytime soon!
    Explore Scientific 16" truss DOB; Explore Scientific 152mm carbon fiber triplet w/3" Feathertouch; ES 80mm triplet; Apertura 10" DOB w/tweeker's; Celestron 9.25" Edge; Celestron Edge 14" with Feathertouch; Celestron CGE Pro mount; Celestron AVX mount with ADM "D" saddle; QHY Polemaster; and my first, a Sears 60mm F/11 doublet; ZWO ASI294MC-Cool; ES field flattener; ES 3" flattener/FR; Televue 0.8 field flattener/FR; lots of TV and ES eyepieces; Lunt solar wedge with Celestron XLT 102

 

 

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