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that particualr binocular I'm pretty sure has fixed ep's, & yes the filter threads are for nebula/skyglow type filters, apparently they can be effective in big bins
If you want seperate ep's you need to buy a binocular telescope BT, which runs clsoe to $1000.
I see you're from the US, check cloudynights.com - binocular threads for more advice
If you want to buy better i would recommend the Garrett sig series 22x85 - they are in a class above, with terrific coatings offering much better contrast, keep in mind most 25x100 binos are acually close to 23x93mm (testing done by US amateur), whereas the premium garrett's are as stated. I have the 15x70SS & they are terrific
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