I have 3 lenses from Harry Siebert - 2" 28mm, 18mm & 7mm for my VC200L + 12" F5 Dob for the times that I go only visual and they always worked pretty well - also the PowerMag Wheel is a convenience (Combo Barlows made to match the 3 lenses) and they are pretty good and sharp
The field-stop seems a bit larger than others
Good value for money
