Greetings All, and Happy Friday!!
I got some nice used Oberwerk 15x70mm LWs here on CN Classifieds for a great deal, a while back, and they are an awesome addition to my equitpment. They were off a bit in collimation, but the great support link on the Oberwerk website helped me correct this very easily with a jeweler's screwdriver, and they are nearly perfect for me, now.
Only drawback is that the focus wheel seems to "drift" away from sharp focus whenever I am using them; it is not so noticeable when holding them horizontally or mounting them on a tripod/mount to view during the day, but if I turn them skyward, as I did with the almost Full Moon, last night, the focus just won't "hold." The view of the Moon through these at 15x is awesome, as are Milky Way sweeps or open Clusters, or planetary conjunctions, or spotting the brighter asteroids...by the way... *grin*
Anybody else experience this with either Oberwerk brand or other larger binos of this type??…
I'm thinking that I need to perhaps service and grease them with a "thicker" grease, or see if there is anything "loose" in the focus wheel or elsewhere on the crossbar..or is there some way of adjusting the tension a bit tighter...
Any advise or common experience would be appreciated!
Regards and Clear Skies,
Randy in South Carolina