Giant Field Flattener 68 mm for tecnosky refractor 115 and 130 mm

Field flattener 68mm diameter for Apo tecnosky 115 and 130mm refractor. It is screwed directly on the thread 3 "tecnosky refractor thus eliminating the vignetting due to a possible bending.
Side camera a adapter T2 is delivered with the corrector, to be able to mount cameras reflex or ccd.
With this corrector the field is perfectly corrected even in full format and the focal length of the telescope unchanged.
With the T2 adapter, you have a 54mm rear back focus, ideal for use with SLR cameras.
By removing the adapter the back focus is increased to 99.5 mm (total), which gives you the possibility to insert accessories like filter wheels, off-axis, ect ect ...