I have run across a couple of references to to new Sharp star D150 f2.8 Astrograph. A fairly different sort of Newt, as it uses a hyperbolic primary. TS is selling a badged version as the Hypergraph 6.
https://www.teleskop-express.de/shop...rbontubus.html
There is a thread on Cloudy Nights about it as well,
https://www.cloudynights.com/topic/6.../#entry9399184
Fairly pricey, but cheaper than an Officina Stellare. They also have a 200mm, f3.2 version which uses a parabolic primary.
Big image circle 45mm (full frame).
Reading some of the CN reviews, it seems the QA may be a bit spotty, some good, some not, mainly mechanical, screws, etc. Probably would expect more quality in that price bracket. Frankly a hyperbolic primary scares me.