This is the 10mm eyepiece I was looking at - https://www.lazada.vn/products/thi-kinh-10mm-truong-rong-62-celestron-aspheric-i818190389-s2235870230.html?exlaz=d_1:mm_150050845_51350205_2010350205::12:1497503216!59440595164!!!pla-293946777986!c!293946777986!2235870230!128141203&gclid=CjwKCAiAn7L-BRBbEiwAl9UtkBk9tGwR4U65FmZsF3ghTCdOCkkKm8ZMO93Eue6DLxTZBGUA73FUOxoCoagQAvD_BwE
I have been reading forums of users with the C90 and they have said that they have upgraded to a 90 diagonal so it is possible.
Thanks for the info about the tripod. The C90 is 2.3kgs so I will find a tripod that supports it.
I was wondering if any other mm eyepiece would be worth investing in? I don't know much about what they do. I just saw someone saying a 10mm with a barlow could be too much and a 25mm could be better?
Spec for eyepiece translated -
Brand: Celestron, Aspheric series
Focal length: 10mm
Standard: 1.25 inch (~ 31.7mm)
Field of view (FOV): 62 degrees
Laminated glass: Plossl
Coating: multi-layer (fully coated)
Weight: 50g
Eye cushion rubber: Yes
Highlights: large focal length, wide suitable for observing nebulae, star clusters, ... With anti-slip lock groove when mounted on telescopes, natural rubber night eye for comfortable viewing comfortable for a long time