Anybody have any experience with these?
I have an identical (and I do mean identical -- sans the levenhuk logo) pair. Had 'em for maybe ten years or so. The Levenhuk website says they were made in PRC, "controlled by Levenhuk", but that the model is discontinued.
Anyways, they've been great little DSO scouts for me for years, but I'm having trouble repairing the focuser on 'em. Notice how the focus knob is between the arms, instead of behind 'em? Yeah -- makes it so that you have to completely disassemble the things to get the focuser mechanism out. Instead of a simple threaded arrangement, that big knob contains some sort of slip tube with a slot in it, and a shaft that has a screw sticking out one side that rides in a slot in the slip tube... I guess I'll have to post some pictures to clarify what I mean. Anywho, I recently picked up the binos to use 'em and discovered that the focus mechanism was loose. I don't mean the knob turned too easily, I mean the eyepieces would slide in and out some without the focus mechanism turning at all. Makes it so you can't hold focus when you put the binos up to your eyes. They don't slide all the way, just enough free play to de-focus the image. And they still respond to actual knob turn as well. So I dug into 'em to see if I could figure out how to fix 'em. Of course the entire mechanism was chock full of The People's GreaseTM -- which gets even oozier, stickier and nastier that usual in 100°+ Texas heat, lemme tell ya. For now, all the parts are soaking in a Tupperware full of soapy water, but I'm sure I'll need to dig out the VOC solvents to really clean the stuff to where I can sort out the problem.
The thing is, all of the repair videos I've been able to find on YouTube show how to repair standard style binos with a threaded focuser on the rear, not this kind. I sure could use some help if anybody has experience with this sort of mechanism. (I'll see if I can get some photos posted this weekend. I'll probably need to get the parts cleaned up first, otherwise all you'll be able to see is goo.)