SingAstro

The aliexpress photo show glued objective , so perhaps expect slightly more edge abberations than air-spaced.

If you were comparing the nexstar SE series , then the 4-5 vs 6-8 have different mount although they look similar.
The jump from 5 to 6 is not just the telescope bigger but also the mount.

Somebody sent me this PM @ cloudynights
not sure if admin fixed it yet

the last registered account was late May , no new account registered here June July August

Mr Chia , the specs are as follow

145mm tube diameter , exclude dovetail , front cap , finder shoe
38cm length
3.4 kg weight
1770mm fl for 2" , 1540mm for 1.25" visualback

Saw this while I zoom out , they added Mercury Venus and the other smaller moons.
Missing the 4 gas planets.

It was added 6 months ago.
http://www.blog.google/products/maps/sp ... ogle-maps/

^ That mount he have is powered by hand turning knobs.

Those 2 telescope you quoted are maksutov design , unsuitable for DSO astrophotography.

Weak mount weak tripod (relatively cheaper) limit your upgrade options when your scope or instrument get heavier in the future , later you end up buying twice ...

76mm F10 usually mounted on a yoke design tripod mounting , that's not good to use.

Entry level stuff top out at around 1x mag per mm , the 2x number quoted on website are for better polished optics. Celestron website goes even further quote around 2.3 to 2.5x per mm , misleading.

For my mount I filled the arm empty area with epoxy and drilled out the bottom 2 of the 6 holes at the side to attach 2 more bolt and nut. M5 size fit well.

Worth a try. Low cost materials, big improvement.

ebay.com.sg have those no-brand VSP at $22 only

search "telescope vibration"
then left side tick the box "worldwide sellers"