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Thread: Do you clean your eye pieces?

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    Default Do you clean your eye pieces?



    There is a substantial amount of smudge on the eye side of my EPs lately. And it also bothers me that I've noticed this after a particularly intense and busy outreach session, so I think there are cooties on them too... I generally take a "don't look at EPs in the light, don't shine a flashlight on your mirror" healthy approach, but I'm thinking the EP surfaces themselves might be OK to clean. Do you regularly, or at least some times, clean yours? I was thinking of using the same equipment I use for my photographic lenses. Any thoughts?
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    Default Re: Do you clean your eye pieces?

    The only substance I trust on my eyepieces is Baader Optical Wonder fluid.

    https://www.baader-planetarium.com/e...ing-fluid.html
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    Default Re: Do you clean your eye pieces?

    Eyepieces do need to be cleaned as necessary due to oils from the eyelashes and such.
    LensPens (real ones not the cheap copies) work well for light cleanings and you can check your local camera shop for Zeiss cleaning fluid, lens wipes and cloth.
    I imagine the Zeiss and Baader fluids are fairly similar but have not used the Baader cleaner.

    If needed a solution can be made from distilled water, 95% or better Isopropyl alcohol and Dawn (blue original) dish soap.
    50/50mix of water and alcohol and 2-3 drops of soap per 1 litre.
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    Default Re: Do you clean your eye pieces?

    Women's cosmetics on their eyelashes puts down some stubborn gunk now and then. I keep a lens pen, spritz bottle of solution and a lens cloth in the eyepiece case for emergencies.
    Bruce
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    Default Re: Do you clean your eye pieces?

    Hello rocdoc,

    I am mostly using the wet tissues from the ZEISS cleaning set.
    https://www.bhphotovideo.com/c/searc...op+Nav-Search=
    As any cleaning fluid leaves a thin film of diluted dirt, I finally take the Leica cleaning cloth.
    https://www.bhphotovideo.com/c/produ...ing_Cloth.html

    You can use the lens pen in the final step when the AR multicoatings have a protective quartz layer on their top,
    but as this is hardly ever the case on our astronomy optics, I don't take a lens pen, staying on the safe side.

    Best,

    JG
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    Default Re: Do you clean your eye pieces?

    A nice quality makeup brush to dust away any lose particles, or a bulb blower..... A Zeiss lens cleaning tissue.... A quality micro-micro fiber to polish them off.

    For stubborn stuff I will use R.O.R. optics cleaning solution with Accuwipe lint free tissues, then start with my regular process.

    Lens pens I'm afraid of, as I have had them scratch eyeglasses before.
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    Default Re: Do you clean your eye pieces?

    Yeah, I do this periodically as they will collect eye lash oils. What I do personally since I don't allow mine to get excessively crudy, is to blow any loose particles off or use a good makeup brush as Frankie suggested. Then huff a hot breath on the glass and use a clean Q-tip (the real ones not the off-brands) and use a circular motion to wipe (light touch please) in circular motions. On my ES 82s I typically remove the rubber eye cup from the eye lens before doing this so I can get in there easier.

    Depending upon the size of the eye lens and condition, I will use both ends of one, two or at most three Q-tips. I do a portion, then switch to the other end of the Q-tip for a clean surface. Huff a breath on there as much as needed since it evaporates quickly. If I find a stubborn smudge, I simply repeat the process as needed to remove it. Worst case, one can lightly apply some blue Windex with a Q-tip. Don't soak the cotton and make it drippy, rather a light touch of the liquid on the Q-tip. It will air dry. I have done this process for years and had no issues.

    I have also utilized the brand name Lens Pen in times past. But if you do, remember to replace them regularly as they don't last forever before one runs the risk of damaging surfaces. Basically common sense.

    Hopefully you don't have any with an eye lens this tiny! In a case like the below, a Q-tip is your friend!

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    Default Re: Do you clean your eye pieces?

    From time to time I will gently puff blow the eye lens and if there is anything left I very gently use the Zeis wipes moving the slowly so they leave no streak. If I do not have wipes I just use a common 91% alcohol...the higher % the better, but I don't use any less than the 91% I can get at the pharmacy. I gave become much more relaxed about this than I was in the beginning. I am almost afraid to look at the images JG is going to post after shining UV light into his optics. :-)
    Outreach would necessitate a more regular approach I am sure.
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    Default Re: Do you clean your eye pieces?

    Thanks everyone, some very helpful practical tips here!
    Properly collimated cornea-lens-vitreous optical apparatus, projecting on retinal sensor slightly limited by deuteranomaly, feeding through stock optic nerves into functional primary cortex, processed through frequently misfiring and buggy integrative cortex.
    Other instruments: Skyline 8" Dobsonian; Celestron Omni XLT 120 w upgraded focuser and diagonal on Meade LX70 setup; Oberwerk 25x100; Celestron SkyMaster 8x56. Main EPs: ES 82║ 24mm, Meade UWA 14mm, ES 82║ 11mm, Olivon 70║ 8mm, Meade HD-60 6.5mm and 4.5mm. Filters: UHC, 13%, blue. Finders: RACI, Telrad, RDF, reticle.

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    Default Re: Do you clean your eye pieces?

    I use optical lens cloths to gently clean the surfaces. I actually hadn't cleaned any of my lens surfaces for several years after I got back into the hobby in 2012. Also, a soft camel hair brush can be used to clean off any loose debris such as small flakes of skin that may have adhered to the surface. You can get a camel's hair brush from art supply stores such as Michael's.
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