The first three f/4 correctors are ready. They are 126 mm of optical diameter (about 5″) and have three elements, one of wich is an ED lens.
This high-end design corrector is the core of our new optical design and thanks to this the optical performances are so awesome (see Optical Performances).
The primary and secondary mirrors are ready too, and autocollimation tests will start very soon. The f/8 correctors lenses are ready too and they are waiting to be mounted.