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    Default Opinions on Besser 70 EPs



    I would like opinions on Besser 70 EPs. Thank You.
    ES AR 102 102mm, f/6.5, Orion Starblast 4.5 114mm,f/4 , Celestron 10x50, GSO SV 30mm, ES 68° 20mm, ES 82° 14mm, 11mm, 8.8 mm, 6.8mm, 4.7mm. Twilight 1 mount.

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    Default Re: Opinions on Besser 70 EPs

    I have all three of the 1.25 inch. They are reasonable eyepieces for the price and field of view. They are not as sharp as my Plossles in the middle of the field, but almost are. They have more field curvature such that the outside looks a little out of focus when the middle is focused. They have good contrast. I am using them in my Infinity 80 f/5 refractor for wide views in the eyepiece and am happy with them. They are not as good as my ES 68 eyepieces, but a whole lot less expensive and not as large physically.

    I am not sure how they would perform in your Starblast, but should work well in your 70mm Travelscope. In your Starblast, there is a chance that stars around the outside would be expanded in size, may be deformed into an oval shape to all the way to a short curved line. I have had other 70 degree eyepieces before and find these working a little bit better than the previous ones.
    Bill Steen
    Sky Hunters' Haven Observatory, Broken Arrow, Oklahoma
    Meade LX 70 8R & 6M, Infinity 60, 80 & 102,
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    Default Re: Opinions on Besser 70 EPs

    They are an Erfle design and will likely show serious coma with your fast little Newt but less curvature with the little refractor. They perform best with long refractors, SCTs, and Maks.

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    ACF 8"SCT,
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    Default Re: Opinions on Besser 70 EPs

    I had a 2" 25mm and currently have a 1.25" 10mm. I wasn't'the and am not overly impressed with either in F/5 to F/10 refractors. Weak towards the edga and nothing special on axis.
    "I've... seen things you people wouldn't believe; attack ships on fire off the shoulder of
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    Default Re: Opinions on Besser 70 EPs

    Thanks. Good to know.
    ES AR 102 102mm, f/6.5, Orion Starblast 4.5 114mm,f/4 , Celestron 10x50, GSO SV 30mm, ES 68° 20mm, ES 82° 14mm, 11mm, 8.8 mm, 6.8mm, 4.7mm. Twilight 1 mount.

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    Default Re: Opinions on Besser 70 EPs

    Quote Originally Posted by Ozman13 View Post
    They are an Erfle design and will likely show serious coma with your fast little Newt but less curvature with the little refractor. They perform best with long refractors, SCTs, and Maks.
    Agreed -- I have the 15mm and 20mm and they are fantastic in my f/10 6SE and f/11 C14. They are "ok" in my f/4.7 C10-N. I think you'll be disappointed with them in your fast Starblast 4.5 -- I suggest going for something with a bit more spherical correction, like an ES68 series. They cost more, but you get what you pay for -- fast scopes are more demanding of your eyepieces and the less expensive ones generally can't cope.

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