Fixing a faulty relay board.

[@t1d100]

I would have to suspcct that the device was damaged by a customer, returned and, then sold to you?

[@unclesamautos]

So you turned off auto focus and are using .75 Barlow lens?

[@Tech-Relief]

If you are talking about the microscope camera, it does not have autofocus so I assume you mean the auto exposure? In that case yes I use it with auto exposure turned off so I can adjust the external lighting to get the best exposure.

[@Tech-Relief]

I tend to use the .5 or .75 barlow les as appropriate.

[@Tech-Relief]

Who knows? The seller appears not to answer messages either. Such is life dealing with Aliexpress...