I presume this is for the Nat geo 76/700 reflector telescope listed in the first post.
You have my comments on the Baader zoom. That eyepiece may be a bit expensive for you. You might wish to look at the Celestron 8-24 zoom which is about 1/4 the price. I have both.
If you search on Baader Hyperion zoom or some combination of that you should find posts. Also BHZ is a common abbreviation.
Sane for Celestron Zoom.
Plossls - GSO, Celestron, Meade and Orion all seem to be very good. I have pieces of each. Tele Vue is reputed to have the best but at 2-3X the price.
I don't recommend Plossls below 10 mm as the eye relief gets quite short.
I am in the USA so you will need to check local source to see if these are available.
good eyepieces at moderate prices:
AT Paradigm Dual ED
https://www.astronomics.com/astro-te...ieces_c52.aspx
I believe the StarGuider series is the same eyepiece
https://agenaastro.com/catalogsearch.../?q=starguider
Both of the above eyepieces get consistently good reviews. Wider field of view than a Plossl and better eye relief, especially at shorter eyepiece focal lengths.
Orion Expanse
https://www.telescope.com/Accessorie...?ensembleId=55
I have not used these but they seem to be a pretty good value and get high ratings on the Orion Website.