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Thread: Russel Optics 56mm Super Plossl and DIY eyeguard

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    Bigzmey's Avatar
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    Default Russel Optics 56mm Super Plossl and DIY eyeguard



    Recently I picked Russel Optics 2" 56mm Super Plossl to serve as low power/max exit pupil EP in my F10 8" SCT.

    The EP is well made. I don't like large and heavy EPs and was pleasantly surprised how compact and lightweight (10 oz) it is. It uses plastic called Delrin as body material, which looks good and feels good to the touch. Lens coating has rich blue/purple look of more expensive EPs but, I can't tell yet how well it translates in light transmittance and light scatter control.



    I had a brief first light at the dark site a week ago. The view was sharp and very flat, but the EP does not come with rubber eyeguard and due to the extra long eye relief I had to float my eye a few cm above the top lens. This is an obvious issue since tons of stray light gets between the eye and EP and holding eye position is a bit difficult.

    First I looked for a proper size eyeguard on-line and could not find any. But yesterday I was messing with my 150R and realized that I can make an eyeguard form the same black 3mm crafting foam sheet I used to make dew shield for the 150R. It took me under 5 min to manufacturer the eyeguard (also used black duct tape on the outside) and I am quite happy with result.



    It fits nicely EP top. It is soft so I can press my eyeglasses next to it without danger of scratching them. I tested it during the day and it does excellent job blocking stray light, and makes finding and maintaining eye position much easier.

    I will report back once I have a chance to test the EP on a few DSOs.

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    Default Re: Russel Optics 56mm Super Plossl and DIY eyeguard

    Nice solution, Andrey! Craft foam to the rescue!
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    Bryan

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    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
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    Default Re: Russel Optics 56mm Super Plossl and DIY eyeguard

    Very nice Bigzmey and a nice work around with the eye cup!
    I hope it works well for you, Russell makes some great Konig eyepieces also.
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    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
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