Newtonian Coma Corrector and 0.73x Focal Reducer for your Newtonian telescope:

This corrector increases the speed of your Newtonian telescope and corrects for Newtonian coma. The exposure times during astrophotography can essentially be almost halved. This corrector was designed by H. Ackermann (USA).

The corrector is usable for the following Newtonian telescopes:
Basically, the corrector/reducer can be used with all Newtonians from f/3.5 to f/8. It has an M48 thread at the camera side. The adapter shifts back the focal plane by 15-16 millimetres. This value results from the reduction factor of the reducer. You need approximately 85mm from the 2" receptacle of the focuser to the focus to make the reducer operational. UNC and ONTC Newtonian telescopes from TS Optics can be prepared for the use of this special corrector.

Because of the increased speed, you also have to pay attention to accurate clamping because even minimal tilting results directly in unsharp stars at the edge of the field.

Usable image field of the TS-Optics corrector-reducer:
The design of the corrector allows for a usable field of 22mm diameter with 100% illumination. With a little trick during focusing, this field can be extended to approx. 30mm - For example, don't use a star in the middle of the field, but use a medium bright one in the outer third of the field.

Practical tip - how do I get 55mm working distance using this corrector?
The distance of the corrector is 67mm (+/- 0.5mm) from the M48 connection thread. The working distance is always calculated from the corrector to the camera which is typically 55mm for most cameras :

• Distance 55mm with T2 connection: Using a 1mm spacing ring , a 5mm Extension , an M48x0.75 to T2 high profile adapter
  
• Distance 55mm with M48 connection: Using a 1mm spacing ring (x2) , a 10mm Extension

Spec:

• Barrel size: 2"
  
• Connection thread at the camera side: 2" filter thread (M48x0.75)
  
• Working distance from the camera thread: 67mm to the sensor (+/- 0.5mm)
  
• Reduction: Focal length reduced to 0.73x
  
• Filter thread: 2" filter thread at the telescope side
  
• Coating: Fully multi-coated
  
• Corrected field: 22mm diameter - usable up to 30mm diameter
  
• Length: 56mm

Whats included:

1. TS Reducer Corrector
   
2. Dust caps