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Thread: Question about the Interior of Eyepieces.

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    Default Question about the Interior of Eyepieces.



    Hi, I am somewhat new to Stargazing. I have two Meade 4000 plossl eyepieces. And I was wondering if the Interior of the stainless steel ring on Eyepieces are supposed to be entirely blackened to prevent lightloss or lack of contrast. Because in my two eyepieces, which I bought together in a set, the rings are onlly 2/3rds blackened. I wanted to know if this was Normal or if I should consider buying replacements.

    I also wanted to know if it is okay to use a Microfiber cloth to clean eypieces like I do with my eyeglasses and digital screens? I thought it was okay but someone I ran accross, suggested it might not be a good idea.

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    Default Re: Question about the Interior of Eyepieces.

    Welcome to the forum!!

    Cheaper mass produced EPs are prone to slight defects, and yes they can cause a degradation of the view in some cases. But if it is not an obvious impediment, I wouldn't worry. Of course it's always a good idea to upgrade your EPs to better quality ones, but I wouldn't replace a working EP with the same EP hoping for a better view.

    I clean my EPs with a microfiber cloth, never had a problem.

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    Default Re: Question about the Interior of Eyepieces.

    Hello and welcome to the forums
    There are cleaning fluids available if the eyepiece is really dirty but a light clean from a microfibre cloth will be alright.
    Just be gentle and do not "scrub" it with the cloth.
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    Default Re: Question about the Interior of Eyepieces.

    The best system I have seen (and one I use) is the LensPen. It is engineered to clean lenses and eyepieces wthout damaging the coatings. I have been using them for years.
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    Default Re: Question about the Interior of Eyepieces.

    If the 'reflective' area you are concerned about is in the lower barrel section of the EP, these are typically easy to unscrew and remove and paint/flock with a quality material to help reduce light scatter and improve contrast.

    I almost always use a micro-fiber for cleaning. Occasionally I will use a Zeiss moistened lens tissue, or in worse cases a pre cleaning with R.O.R. solution to remove any stubborn oils/smudges, then the Zeiss and a micro-fiber to finish.
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    Default Re: Question about the Interior of Eyepieces.

    Quote Originally Posted by baward85 View Post
    Because in my two eyepieces, which I bought together in a set, the rings are onlly 2/3rds blackened.
    Are these 9.7mm and 26mm by chance?

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    Default Re: Question about the Interior of Eyepieces.

    To be sure that the inside of the eyepiece-barrel doesn't reflect any false light into the lens of your eyepiece, you could blacken it with a thin layer of mattblack paint or flocking material. You need not do that to the last outer edge, for that is the place where you normally screw in filters. In most cases you won't notice any difference, for the light beams that have been converged this far in the telescope, won't intrude. In many cases false light beams are bounced into the eyepiece from shining parts closer to the objective. You can check this by aiming the telescope near to the moon, remove the eyepiece and look into the eyepiece-holder . The shining parts, if any, will show themselves to you. Blackening those is far more effective.
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