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Thread: Want to upgrade eyepieces

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    Default Want to upgrade eyepieces

    I like planetary viewing.I have a 1500f/L,127mm maksutov telescope.I would like to upgrade my eyepieces from the current Plossl's I have.Was wondering what would be some good types of eyepieces to get that would produce very crisp,sharp contrast images?Any suggestions and your opinions on the optics?

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    Default Re: Want to upgrade eyepieces

    I think your best bet for planetary work with that scope is a ~10mm orthoscopic or monocentric eyepiece. I really like my ortho from University Optics -- it's noticeably better on planets than my Meade Series 5000:

    I've also heard good things about the Seibert Optics Star Splitter series: Siebert Optics - Eyepieces - 1.25" And of course the Seibert Monos: Siebert Optics - Converters

    What it boils down to is that for planetary observation, you want an eyepiece that scatters the least amount of light -- and that means fewer lens surfaces. Moncentric and Orthoscopic eyepieces have few lenses (3 and 4 elements, respectively) which makes for better contrast and less ghosting/flaring. However, these designs have fairly small "sweet spots" where the image is crisp and clear, right at the center of the field of view. So having a tracking mount is critical.

    At the other end of the spectrum, I have heard folks describe the Televue Delos as one of the best planetary eyepieces they've ever used, despite its complex (8? 9? elements?) design.

    As far as focal lengths go, a 12mm eyepiece will give you a 1mm exit pupil and 127x magnification. I imagine you could probably go with 9-10mm and still have a nice view. If planetary observation is your passion, I might suggest a range of eyepieces around the 12mm mark: perhaps a 12, 10 and an 8mm so you can dial in the perfect amount of magnification given the atmospheric conditions.

    Good luck, and let us know what you decide!
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