For Precise Focusing: Flip mirror makes easy to find exact focus point and also correct position for astrophotography; small black box has a moveable flip mirror which shunts light path 90 degree upwards; alternatively lets it pass through unhindered
Always Sharp: If tilt mirror to 45 degree position; object will appear in eyepiece and precisely focus it as usual; helical focuser on flip mirror lets to make eyepiece and camera exactly parfocal; this means elements will be in focus at the same time
An object that is accurately centred in the eyepiece will be simultaneously centred in the camera's field of view; you no longer have to worry about whether the object is correctly positioned on the chip - you know it will be
Equipped with 40 degree to 60 degree field of view and non-click stop adjustment mechanism; ensuring that the observer can find the perfect combination of field of view and magnification that the target object and seeing conditions will allow
Continuous focal length zoom of 8 mm to 24 mm for a wide range of magnification without the need to switch eyepieces; parfocal over entire range so no need to refocus as focal length is changed