TS Optics N-AGK3 3" coma corrector für Newtonian telescopes up to f/3

TS Optics N-AGK3 3" coma corrector für Newtonian telescopes up to f/3

Developed for fast Newtonian telescopes such as the ONTC and UNC Newton's, the 3" coma corrector from TS Optics is also one of the most versatile coma correctors on the market with compelling features at an affordable price.

Features

• 100% illuminated and corrected field of 54 mm diameter at f/4
• Working distance of 69.3 mm from the optional M68 thread (telescop side)
• Length 5.125" / 130 mm
• Focal length extension : factor 1.14x

Telescope side adaption

The N-AGK3 corrector has a 3" barrel, so the focuser has to accept 3" accessories. This requirement is fulfilled by focusers like the large APM 3" focuser, the JMI Event Horizon 3" focusers or the TS UNCN3 focusers.

Camera side adaption

Thanks to the M68x1 thread connection, you can attach M68 accessories. The adapter itself has only 1 mm length, so you have 69.3 mm working distance from the M68x1 thread. That offers enough space for generous adaptations. If filters are used, you should add 1 mm to the working distance.

The TS N-AGK3 corrector compared to a 3" Wynne corrector

• Wynne corrector:
  Length 137 mm + working distance of only 57 mm, thus the focal plane is approximately 194 mm off the field lens. The reduction factor of the corrector is 0.95. Limited through the field lens of the corrector, the fully illuminated field is approx. 29 mm at f/4. Furthermore, the Newtonian needs an extreme superstructure of 190 mm from the tube to the focus. Also, the secondary has to be dimensioned extremely large, approximately 40% of the aperture!
• TS N-AGK3 corrector:
  Length 130 mm + working distance 73 mm. Through the extension factor of 15%, this distance is fully compensated. The real focus is located only 130 mm above the tube. At f4, the fully illuminated field, limited by the field lens of the corrector, is approximately 50 mm. Thereby, the secondary can be dimensioned significantly smaller, approx. 30% of the aperture.

So, with regard to illumination, the advantages of the N-AGK3 over the Wynne corrector are clear. For achieving a similar effective focal ratio, a faster Newtonian can be used with the N-AGK3 coma corrector.

Delivery contents

• N-AGK3 coma corrector

No spherical or chromatic aberration