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Old Monday 6th February 2017, 14:48   #6
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Join Date: Jun 2016
Location: Fife or middle of North Sea
Posts: 1,102
A bit late in wading in, but..... I tried the HDF and the SDL on a MM3 60. I could not see any difference in optical performance. The Opticron rep who was with me indicated that you would only see a real difference if you compared the two eye pieces on a bigger scope. Both worked very well with the MM3 60.

I did raise the waterproof question, and was informed that if I dropped scope and eye piece in a pool of water, there should be no water ingress as long as the screw connection is snug.

I have now been using scope and HDF eyepiece for 6 months with no problem.
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