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Thread: Taking 6" imaging Newt to next level

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    Johnny J.'s Avatar
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    Default Taking 6" imaging Newt to next level



    I have enjoyed modifying my old Orion 6" F5 reflector for AP. Focuser up-grade, electric focus motor, cooling/dew prevention system, boundary layer fan baffles, tube reinforcement at focuser and finder shoe, and assorted other little tweaks. It has rewarded me with some excellent images but with one glaring problem. Diffraction Spikes!. Some like em' some don't.....I did at first, but on bright objects they are quite objectionable to me now. I wish to rid my optical AP endeavors of them. I have been in contact with Hans @ 1800Destiny and ordered one of THESE. Due in a week. I am hoping that this will cure my spike phobia! This should bring the modest 6" reflector, which is color free, and coma corrected+flattened, into the realm of APO like performance. True the reflector has a large central obstruction of 2", but the 6" aperture and fast F5.5 (with optical correctors 825mm FL) give it an edge over my refractors (F6 and F7.5) for concentrating photons onto an APS-C CMOS sensor in a short amount of time.
    Img-06-11-2016-206-2.jpg
    Img-11-25-2015-067 1600.jpg
    27350890605_45c8ea2e71_b.jpg
    JJ
    Last edited by Johnny J.; 01-11-2017 at 04:10 AM.
    Scopes: 20"Obsession F5 Dobsonian with ArgoNavis-ServoCat Drive & 10K DSC's. OTA's: Orion 6" F5, Meade SN6 F5, Orion 120mm F7.5 EON ED, AT 72mm F6 ED. Mounts:SW EQ-6 GT on LX850 3" Leg Tripod with pier, CG5-ASGT, Vixen SP DA drive on Celestron 2" SS Leg tripod. Eyepieces:Televue:31mm T5, 22-17-12mm T4's, 10 & 8mm Ethos, 2" 2X Powermate, 1.25" 2.5X Barlow. Baader Hyperion:21-17-13-10-8-5mm.

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    Default Re: Taking 6" imaging Newt to next level

    Nice, JJ. I can see myself following in your footsteps. Coma corrector is here and 2" focuser on the way. Aitofocus may be next.

    I have read good things about the curved vanes, will be interested to see how it works out for you.

    Bob
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    Hardware: Celestron C6-N w/ Advanced GTmount, Orion ST-80, Canon 60D (unmodded), Orion SSAG Software: BYE, PHD2, DSS, PhotoShop CC 2015, StarTools

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    Default Re: Taking 6" imaging Newt to next level

    Quote Originally Posted by bobharmony View Post
    Nice, JJ. I can see myself following in your footsteps. Coma corrector is here and 2" focuser on the way. Aitofocus may be next.

    I have read good things about the curved vanes, will be interested to see how it works out for you.

    Bob

    Hi Bob
    I see you have the Celestron version of this scope. I recently did a focuser modification to a friend's C6N. Really nice scopes for the investment and can take some excellent images. Hope your modification goes well. Did you have the 1.25" focuser? If so you will have to enlarge the hole to allow for the larger draw tube.

    Which coma corrector you get? I'm using the GSO CC with very good results.
    IMG_0012.jpgIMG_0013.jpgIMG_0014.jpg
    JJ
    Scopes: 20"Obsession F5 Dobsonian with ArgoNavis-ServoCat Drive & 10K DSC's. OTA's: Orion 6" F5, Meade SN6 F5, Orion 120mm F7.5 EON ED, AT 72mm F6 ED. Mounts:SW EQ-6 GT on LX850 3" Leg Tripod with pier, CG5-ASGT, Vixen SP DA drive on Celestron 2" SS Leg tripod. Eyepieces:Televue:31mm T5, 22-17-12mm T4's, 10 & 8mm Ethos, 2" 2X Powermate, 1.25" 2.5X Barlow. Baader Hyperion:21-17-13-10-8-5mm.

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    Default Re: Taking 6" imaging Newt to next level

    Quote Originally Posted by Johnny J. View Post
    Hi Bob
    I see you have the Celestron version of this scope. I recently did a focuser modification to a friend's C6N. Really nice scopes for the investment and can take some excellent images. Hope your modification goes well. Did you have the 1.25" focuser? If so you will have to enlarge the hole to allow for the larger draw tube.

    Which coma corrector you get? I'm using the GSO CC with very good results.
    JJ
    Hi JJ. Yes I have the 1.25 focuser and anticipate having to cut a larger hole. I have the GSO CC as well an am happy to hear it has worked well for you. I have one 10mm spacer on the way from ScopeStuff, it came with a 5mm spacer and I need a total of 70mm. I am waiting for the focuser to be in stock at AgenaAstro , then will be on my way.

    Bob
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    Hardware: Celestron C6-N w/ Advanced GTmount, Orion ST-80, Canon 60D (unmodded), Orion SSAG Software: BYE, PHD2, DSS, PhotoShop CC 2015, StarTools

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    Default Re: Taking 6" imaging Newt to next level

    Just contacted by Hans and spider is on the way. Took 12 days but this was a custom order. Now to wait on the shipping time.
    JJ
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    Scopes: 20"Obsession F5 Dobsonian with ArgoNavis-ServoCat Drive & 10K DSC's. OTA's: Orion 6" F5, Meade SN6 F5, Orion 120mm F7.5 EON ED, AT 72mm F6 ED. Mounts:SW EQ-6 GT on LX850 3" Leg Tripod with pier, CG5-ASGT, Vixen SP DA drive on Celestron 2" SS Leg tripod. Eyepieces:Televue:31mm T5, 22-17-12mm T4's, 10 & 8mm Ethos, 2" 2X Powermate, 1.25" 2.5X Barlow. Baader Hyperion:21-17-13-10-8-5mm.

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    Default Re: Taking 6" imaging Newt to next level

    Very nice. It's looks doable. Let us know how it works out for you. (I'm interested in testing something like that...)

    BTW, how much did you pay for the GSO CC?

    Clears,
    Joe
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    Default Re: Taking 6" imaging Newt to next level

    One of the very first things I did with my vintage Larry Hardin made custom Newt. Love 1800 destiny!
    post-216436-0-49261200-1485012301_thumb.jpg
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    1984 Meade 2120 10" SCT- 1998 U.S.A. made Celestron C8 SCT -StellarVue SV80ED Doublet- 1960's Homemade 6" F5.6 Newt - Astro Tech AT8IN Imaging Newt- Vintage 1961 H.O.C. made ATCO 80mm/1200mm refractor w/ original vintage eyepieces - Zhumell, Orion, Astro Tech 9x50 finderscopes - Orion Atlas AZ/EQ-G
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    Default Re: Taking 6" imaging Newt to next level

    Quote Originally Posted by BABOafrica View Post
    Very nice. It's looks doable. Let us know how it works out for you. (I'm interested in testing something like that...)

    BTW, how much did you pay for the GSO CC?

    Clears,
    Joe

    Hi Joe
    Got it from Agena HERE. Seem's they are out of stock right now though.
    JJ
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    Scopes: 20"Obsession F5 Dobsonian with ArgoNavis-ServoCat Drive & 10K DSC's. OTA's: Orion 6" F5, Meade SN6 F5, Orion 120mm F7.5 EON ED, AT 72mm F6 ED. Mounts:SW EQ-6 GT on LX850 3" Leg Tripod with pier, CG5-ASGT, Vixen SP DA drive on Celestron 2" SS Leg tripod. Eyepieces:Televue:31mm T5, 22-17-12mm T4's, 10 & 8mm Ethos, 2" 2X Powermate, 1.25" 2.5X Barlow. Baader Hyperion:21-17-13-10-8-5mm.

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    Default Re: Taking 6" imaging Newt to next level

    Just now getting around to posting this. The new spider from 1800DESTINY arrived on Wed the 25th. Got around to pulling the old spider and removing the secondary mirror from the Orion center stalk. Orion sticks them on with a double sided tape. I noticed that they did not have it properly offset from center on the major axis and it was off 2mm to one side across the minor axis. The alignment along the central major axis was off also about 3°. This explains why I never got what I would call an excellent collimation with this scope.

    The new spider is quite robust and build quality is comparable to OEM, however the secondary mirror holder is 3D printed instead of an aluminum piece. This was a surprise as it is not mentioned in any literature. For a C note I expected aluminum (which would have required black anodizing...$$$). No parts are anodized just flat black painted. I will probably re-mount the Orion secondary holder (properly this time) and toss this plastic piece of junk holder.

    001.JPG

    JJ
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    Scopes: 20"Obsession F5 Dobsonian with ArgoNavis-ServoCat Drive & 10K DSC's. OTA's: Orion 6" F5, Meade SN6 F5, Orion 120mm F7.5 EON ED, AT 72mm F6 ED. Mounts:SW EQ-6 GT on LX850 3" Leg Tripod with pier, CG5-ASGT, Vixen SP DA drive on Celestron 2" SS Leg tripod. Eyepieces:Televue:31mm T5, 22-17-12mm T4's, 10 & 8mm Ethos, 2" 2X Powermate, 1.25" 2.5X Barlow. Baader Hyperion:21-17-13-10-8-5mm.

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    Default Re: Taking 6" imaging Newt to next level

    An image of how Orion had originally mounted the secondary. This isn't real accurate but gives you an idea of how far off they got this. The green lines are the actual center lines of the secondary. The red lines indicate Orion's alignment.

    003.JPG

    JJ
    Scopes: 20"Obsession F5 Dobsonian with ArgoNavis-ServoCat Drive & 10K DSC's. OTA's: Orion 6" F5, Meade SN6 F5, Orion 120mm F7.5 EON ED, AT 72mm F6 ED. Mounts:SW EQ-6 GT on LX850 3" Leg Tripod with pier, CG5-ASGT, Vixen SP DA drive on Celestron 2" SS Leg tripod. Eyepieces:Televue:31mm T5, 22-17-12mm T4's, 10 & 8mm Ethos, 2" 2X Powermate, 1.25" 2.5X Barlow. Baader Hyperion:21-17-13-10-8-5mm.

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