For Precise Focusing: Flip mirror makes easy to find exact focus point and also correct position for astrophotography; this 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
T ring for Canon EOS SLR/DSLR: Compatible with Canon EOS Rebel SLR/DSLR Camera with EF Mount (Please Attention); including Camera EOS 5d 5d Mark Ii 50d 60d 20d 30d 40d 350d 400d etc; Equipped with one hex wrench that achieve camera's easy angle adjustment
Quick & Convenient Installation: Just clockwise tighten T2/T ring to Canon EOS DSLR/SLR Camera via camera connecting thread after aligning camera lense bayonet; Other end connect with telescope accessories includes M42x0.75 Male Thread like T Adapter