Skywatcher has introduced its Star Discovery 150P, a six-inch newtonian reflector made mostly of ABS plastic, a very hard, stiff, long-lasting plastic. What's unusual about this scope is that it is designed so as not to permit the owner to collimate it, as it is collimated permanently at the factory.
Astronomy and Nature TV has done an excellent in-depth review here:
At 7:30, the presenter discusses the collimation issue. He goes on to defend it because this collimation-free feature is coming from a reputable company like Skywatcher, not some off-brand no-name. He says that because of the thermal expansion qualities of ABS plastic, or more particularly, the lack thereof, the mirror cell does not shift as the temperature changes. He concludes that the scope is "essentially collimated for life."
What do you think? Is it really possible to have a newt with a primary that doesn't need collimation, or is this just so much hokum? How are they able to do this? How permanent is permanent? Will this spread to other newts/dobs?
(A tip of the hat to Ed (aeajr) for coming across this.)