Intes Mikro focal reducer 0.6x - with SC thread connection
... suitable e.g. for Maksutov Cassegrains (f/9 and slower) and flat-field systems
Although this focal reducer has been designed for Intes Maksutov-Cassegrains, it also works very well with other flat-field systems. The make quality is "typical russian" but the optical quality is very good.
The factor is 0.6x and therefore the photographic speed is increased by nearly 70%. For instance, a f/12 system is turned into a f/7.2 system. This reducer has best performance with smaller sensors up to APS-C format. The set distance between the reduer's back SC thread to the sensor plane is 70mm. Prolonging this distance leads to an increased compression factor.
... is not effected. A curved field remains curved and a flat field remains flat.
48mm - better than T2 systems offering max. 38mm
SC female on the telescope side and SC male on the camera side. This thread size is very common and allows individual adaptations for many kinds of telescope/camera combinations.