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Thread: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

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    Default Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic



    My thinking is that the C6R is the better choice, due to the longer focal ratio. However, the C6R is very long, and does not come packaged with better accessories. What say you?

    https://explorescientificusa.com/pro...blet-refractor

    https://www.astronomics.com/6-f-8-ac...-dovetail.html

    One of my favorite YouTube videos https://www.youtube.com/watch?v=L_LQ9vNiwP8
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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    For myself I prefer the C6R but the AR6 has a better focuser than the stock Synta offering.
    Both of my C6R now have Moonlite focuser on them.
    AbbN, jimminCT and Bigzmey like this.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    Both are great scopes. The choice depends on targets. For DSOs I would get F6.5, or F5. For planets, Moon and doubles - F8.
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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    ES definitely comes with a better focuser and better diagonal. The finder scopes are on par. I like the carry handle on the ES rings, a feature lacking on the Celestron.

    But, knowing what I know now, I like my fracs with a little higher focal ratio. That's a personal preference thing, though.

    I do not have the AR152. I do have the AR127, an AR127L, and an AR102L. And I have a C6-R. I like my C6-R best of the four. I do like all four, however.

    Ugh. I am useless on these types of threads.
    Bryan
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    f/5; Celestron C6-R f/8; ES AR127 f/6.4; ES AR127 f/9.4; Stellarvue SV102T f/7; ES AR102 f/9.8;
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    MC90 f/13.3;
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    ST80A f/5; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
    Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen
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    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    Bigzmey:

    Why do you think the f/6.7 would do better on DSO? F/8 is long, but not that long. However, I know f/8 would do better on the planets/Moon/doubles.

    Gabby76:

    What makes the C6R better for you, the longer focal ratio? I like the longer focal ratio, because it will be easier on the eyepieces. How long is your C6R without the dew shield, and the diagonal/focuser retracted?

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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    I will take a measurement in the morning.
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    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    Gabby76:

    Thanks

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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    Almost 4' long. At least, mine is. I used a 4' x 8' piece of luan plywood to make the case for it.
    With a F/l of 1.2 meters, you need some space.
    Attached Images Attached Images
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    OTA's: Kson 1026-C, 4" Carbon Fiber ED Refractor, Celestron C6R, 150mm, Home-built, 6.1", f/2.? APO refractor... (In Progress) 8" Meade LX2 SCT Mounts: ASGT CG-5, CGX Imaging: ZWO ASI 1600MM, Canon 550D (T2i)

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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    The C6R with a Moonlite CR2 focuser and drawtube fully in is 42.25" and with the drawtube fully extended is 46.5" (no 1.25"- 2" adapter in tube)
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

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    Default Re: Celestron 6 Inch F/8 Achromatic Vs. Explore Scientific AR 6 Inch F/6.5 Achromatic

    Refractors in the f/7 to f/9 range are considered as a mid range focal length, they give you a good balance of wide field of view and a bit more magnification range than shorter focal lengths.

    Here are some numbers of what the maximum FOV of different 150mm refractors:

    1) 150mm f/5 - 3.67°
    2) 150mm f/6.5 - 2.8°
    3) 150mm f/8 - 2.3°

    As you can see the f/5 there are few objects that we can see as amateurs that the telescope is not capable of showing fully.
    Even at f/8 the telescope is capable of framing most objects.

    There are pro/ cons to the different styles though.
    A shorter f/l can allow you to use a slightly smaller mount as it does not have to deal with the added weight and moment arm of the longer telescope.
    The longer f/l will let you dig a bit deeper with higher magnification for planetary but the shorter will show fainter objects better.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

 

 
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