My first SCT

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1jimalexander United States of America
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My first SCT

#1

Post by 1jimalexander »


I've been using a refractor up until now.
Just received a Celestron 11edgeHD and a HyperStar.
What a weird experience attaching the HyperStar to the front of the scope.
With the camera and cables, and perhaps a small filter wheel, doesn't this interfere with the light coming into the scope. How is this possible.
I understand that the light comes in the "front" and is reflected to the secondary mirror or, in this case, the HyperStar.
What is the lights path through the front so that the cables don't show up in the frame?
Sorry if I'm not explaining well. Perhaps with responses I can refine my concerns.
    Scope: Skywatcher Esprit 150 Super APO, Celestron C11 Edge HD
    Mount: Celestron CGX-L, Ioptron CEM70G
    Cameras: ATIK 11000 mono ,ASI224MC, ASI533MC
    Filtering: ATIK EFW2 Astronomik LRGB, Ha, s2, O3 (12nm) Optolong L-eXtreme
    Guiding: Orion mini 50 mm, Orion Starshoot, PHD ,Primalucelab 60mm scope, Celestron OAG with ASI290mm mini
    Polar align: PoleMaster, Ipolar
    Software:SGP, Starry Night Pro, PS, PI
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    XCalRocketMan United States of America
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    Re: My first SCT

    #2

    Post by XCalRocketMan »


    Since you have the 11" the effect of objects impacting the light is minimized. I use Hyperstar on my Edge. But, you are correct, there are some issues with loss of contrast and spikes around bright stars. If the camera is small enough (most new cameras are cylindrical and are not bigger than the secondary mirror) these effects are minimized. I wouldn't put a filter wheel in on the act though.
    Scopes Celestron EdgeHD-11; William Optics GT102; William Optics ZS61; Criterion Dynamax-8 SCT
    Mounts AP1100GTO mount w/APCCpro; iOptron iEQ30 Pro; Criterion Dynamax-8 SCT
    Lenses Hyperstar-III; Celestron 0.7x FR; WO Flat/Reducer 0.8x
    Guiding Celestron OAG w/ASI174mm mini; WO 50mm; Orion ST80
    Cameras and Filters ZWO2600mm Pro w/Optolong 3nm NB and RGB; ZWOASI1600mm Pro (ZWO LRGB and Astrodon Ha-5nm, Oiii-3nm, Sii-5nm), QHY10, Canon 50D; ASI174mm mini; ASI462MC; ASI120MC
    Misc Moonlite focuser on Edge - Feather-Touch focuser on GT102; ZWO EAF on ZS61; ZWO 2" and 31mm FWs; Kendrick Dew System, Temp-est Fans
    Software NINA; PHD; APT; BYE; PI; APP; PSP; Registax; FireCapture; SharpCap
    Blog at: SkyAndRockets
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