Hi all, newby on here, thought the following might be useful to anyone using the Pard NV088 unit:
The rubber eye cup didn't work for me seemed to obscure the edges of the screen no matter what relief I set & it also was a pain in keep coming off in any case. Found that with a stretching the rubber eye cup can be push on completely over the diopter focus ring until the lip falls over the focus ring. This not only secured the rubber eye cup but for me it also improved the screen view lots.