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Thread: Best High Power EP for 10" Dob

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    Default Re: Best High Power EP for 10" Dob



    I'm in the Bob G./lordhong camp. If your scope is set up on the Atacama Plateau in Chile, with perfect skies and no turbulence, a high quality dedicated 3mm to 5mm high power eyepiece might be well worth the money. Unfortunately, most of us live under skies that are not only light polluted, but filled with turbulence due to the jet stream, heat waves off concrete and homes etc. Therefore, for most of us, medium power (maybe 20 times the aperture of the scope, in inches) is about as high as we can go without simply magnifying the air turbulence. Therefore, if you are one of those in a relatively populated area, I would suggest a mid-range eyepiece such as a
    12mm. This will give decent enough magnification on the moon and planets for most scopes on most nights. It will also be great for globular clusters and galaxies. On those nights when the sky turns extra calm and quiet, you can use a Barlow to crank up the power. Maybe you would even want a 2.5x Barlow to get extra power and for use with other eyepieces you may have though a 2x should be just fine. The problem with the 3mm and 4 mm. eyepieces is, as stated by others, that they just don't get used much because of sky conditions. Barlows, in my experience, work very well, especially the 3 lens, so called "apochromatic" Barlows. Better to spend a little more on a fine mid-magnification eyepiece that gets used a lot than one which sits in the closet gathering dust. JimS

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    Default Re: Best High Power EP for 10" Dob

    Quote Originally Posted by StarBiker View Post
    I saw Jupiter the other night through the 10mm Plossl, and the detail on the planet wasnt great so I am wondering what is the best magnification that I could get.
    There's a lot more to getting good planetary views than just a high-powered eyepiece. You could probably do well with a ~5mm eyepiece in that scope to bump up the magnification a bit, but you'll still be disappointed with the view unless you take care to address the other issues that hamper good high power observing.

    For a full overview, check out my post here: A Treatise on Optimizing Planetary Views

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    Default Re: Best High Power EP for 10" Dob

    Looks like I'm gonna be doing a bit of travelling on the clear nights to get the best views then! Thanks for the help :-)
    Matt

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    Default Re: Best High Power EP for 10" Dob

    Quote Originally Posted by StarBiker View Post
    Looks like I'm gonna be doing a bit of travelling on the clear nights to get the best views then! Thanks for the help :-)
    The best piece of astronomy equipment you can buy is the "gas filter". Taking ANY scope to a dark site will do more for it than any eyepiece will.
    "My Eyepieces are made from the waste product of exploding stars"
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