About chinese triplets
Chinese loupe named "triplet"(left) and normal triplet(right)
https://farm1.staticflickr.com/938/2...b6d513df_z.jpg
https://farm2.staticflickr.com/1865/...451e802b_n.jpg
So it's not a 30x or 20x - it's about 10x.
and it's not a triplet in real - just a monocle system.
+ there is no CA correction like normal triplets have
+ no distortion correction