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    ssrc30's Avatar
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    Default Boosting my viewing power...



    I am just returning to the hobby and I bought a nice 70AZ which I am really enjoying. The images are much clearer than all the reviews lead me to believe. What I'd like to know is what I can do to boost the viewing range of my scope. I can see Saturn (sort of) but I'd like to see more lol... I know there's several schools of thought on this subject so any real advice is welcome.

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    Default Re: Boosting my viewing power...

    Welcome to the forum. We just had a new member join from Grande Prairie yesterday, so welcome aboard. I can't really answer your question without knowing what eyepieces you already have, what the focal length of your telescope is and what targets you wish to view...ie: planets, stars, galaxies..etc.
    Mark
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    Default Re: Boosting my viewing power...

    Grande Prairie is only about 30 minutes south of where I live so I'm quite familiar with the place lol. My scope has a 900mm focal length and it came with a 20mm 45x and 10mm 90x eye pieces. I'm kind of interested in looking at a bit of everything that I can. Mostly galaxies though and our own solar system as well.

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    Default Re: Boosting my viewing power...

    For planetary I would recommend you upgrade from the supplied Kellner eyepieces. I have a similar rig to yours and found the best combo for planets was a 25mm super plossl eyepiece and a 2X Barlow. That covers the useful magnification of your scope perfectly and will still be a useful combination for Deep Space viewing as well. The added fact that you are blessed with dark skies just makes your viewing that much easier than for us light polluted City folk. I have fond memories of playing hockey in Sexmith in the early 70's when I lived in Grande Prairie.
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    Mark
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    Default Re: Boosting my viewing power...

    Not sure how many Galaxies you will see with a 70az.
    Not many I think.
    The minimum upgrade would be to a 6 inch reflector on a goto mount.
    This would give you a chance that's better than even.
    You could use a dobsonian if you're well familiar with the sky.
    Last edited by jenniferchristine; 11-28-2016 at 09:53 AM.
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    Default Re: Boosting my viewing power...

    How dark is your area?
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    Default Re: Boosting my viewing power...

    I'm in a pretty dark area. It gets dark between 4 and 5 pm right now and stays dark until about 8:30 or 9 am. Only downside to where I live is the constant cloud cover. You have to be ready to run outside when it finally clears lol. I walk out my door and I'm 200 feet from a usable spot at the ball diamonds. Pitter lived here so he'll probably be familiar with the area I'm talking about. I can go behind the grain elevator and only have light from a street light and a new office that's about 100 yards away.

    Far as reflectors go, I'm more of a refractor kinda guy. I do have my eye on a nice VX8 advanced though. For now, I'll definitely take the advice to upgrade my eye pieces.
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    Default Re: Boosting my viewing power...

    In general, you would not expect to be able to use much more than 70x magnifcation with that scope. That would be a 13mm eyepiece. The general rule of thumb is that the maximum magnification is equal to the aperture in millimetres, and the eyepiece that will give you that is equal to the focal ratio.

    Your 10mm eyepiece is already a tad much for that scope, though it will likely still be useable. To use much more magnification, though, you will need superb viewing conditions, the kind you only get 2 or 3 times a year. Even then, I would not recommend going over 140x, 6.5mm.
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    Default Re: Boosting my viewing power...

    Hello and welcome to the forums ssrc, the scope you have is more designed for lunar, planets, splitting double stars than for galaxy viewing. You will be able to see bright deep sky objects though the field of view will be narrow.
    For best views with it I would suggest eyepieces between 20mm and 40mm with an 8mm as a high power eyepiece for when the seeing is very good.
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    Default Re: Boosting my viewing power...

    Welcome to the Forum! If you are partial to refractors you might consider upgrading to a scope in the 4" to 6" range. Explore Scientific and Celestron make a few models in this size range, which will enable you to see lots of galaxies, particularly with your dark skies.
    Michael
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