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Please help me disassemble Newcon 10x50 binoculars (BA8) (1 Viewer)

Hi, can you please help me with disassembly by instructing? I gotta clean the inside of the objective and change the rotten screw, but I can't open it despite screwing off everything. Also please tell me how to insert eyepiece back.photo_2025-04-14_18-42-32.jpgphoto_2025-04-14_18-42-30.jpg
 
"If you find the binoculars not working properly, do not
attempt repairing it yourself as this may void any
warranty. Always deliver the binoculars to a professional
optics repair. If one is not readily available, then send it
back to the factory."
From the OEM manual for the AN-series binoculars, courtesy Newcon Optik, 105 Sparks Ave., Toronto, ON M2H 2S5, Canada

Besides voiding the warranty, specialist jobs like this should be left to the specialists - or folks with a mechanical bent. If you want to clean the objective, why are you disassembling, or attempting to, the oculars? Cleaning the objectives can be done without removing the prisms - you only need to remove the objectives to do that. Once you remove the prisms you will most likely never get those binoculars collimated again.

Have fun :cool:
 
"If you find the binoculars not working properly, do not
attempt repairing it yourself as this may void any
warranty. Always deliver the binoculars to a professional
optics repair. If one is not readily available, then send it
back to the factory."
From the OEM manual for the AN-series binoculars, courtesy Newcon Optik, 105 Sparks Ave., Toronto, ON M2H 2S5, Canada

Besides voiding the warranty, specialist jobs like this should be left to the specialists - or folks with a mechanical bent. If you want to clean the objective, why are you disassembling, or attempting to, the oculars? Cleaning the objectives can be done without removing the prisms - you only need to remove the objectives to do that. Once you remove the prisms you will most likely never get those binoculars collimated again.

Have fun :cool:
The shipment to Canada will cost like half of new binoculars so that's not an option, plus I don't know if warranty works anymore I bought it second hand. I'm removing the prisms because I should change screw that holds them that is oxidized and spilling white things on objective that you can see in photo. If you know how to remove objectives or prism block please tell me, I removed screws and so on but nothing will come off. Thanks for response!
 
Here you can see in photos.
 

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