Teleskop Service 2.5" Flattener for Refractors

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Teleskop Service 2.5" Flattener for Refractors
$369.95
Item # TS-TSFLAT2,5
2 Questions(s)

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  • This Teleskop Service 2.5" Flattener was designed for refractor telescopes.
    Delivers exceptional field correction for all refractors combined with large camera sensors.
    The Teleskop Service 2.5" Flattener has a free aperture of 61.5mm.
    It is universally usable for nearly any refractor from f/5 through f/9.
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Teleskop Service 2.5" Flattener for Refractors



TS Optics Field flattener and -corrector for f/9 - f/9 refractors - 61.5mm free aperture. Delivers exceptional field correction for all refractors combined with large camera sensors.



The TS 2.5" flattener's advantages:



Many refractor correction lenses are not able to illuminate even medium-sized sensors without vignetting or other abberations. For this reason, Teleskop-Service has designed a 2" corrector with very good characteristics and which has proven high-level results with many systems: Link to the 2" Flattener by TS



The bigger 2.5" flattener by TS offers the same characteristics but is able to deal with even bigger sensors. Compared with 2" (or smaller T2 systems), this flattener can illuminate full-format (24x36mm) sensors even with fast refractors without vignetting.



The corrector is suitable e.g. for the following refractors:



All systems with a focuser bigger than 2". For all relevant makes, we offer adaptions: Starlight Instruments Feather Touch, Astro Physics, William Optics, Astro Professional and TS Apos. The photographic speed may be between f/5 and f/9.



The 2.5" flattener offers generous back focus:



Like the smaller 2" version, we have designed this flattener with a wide back focus distance. So it is no problem to add Off-Axis-Guiders, filter wheels etc. The recommended distance between the flattener's M69 thread and the focal plane is 91.5 mm for lenses with f/7 and slower.

  • For f/6, we recommend a distance of 106 mm.
  • For f/5.5, we recommend a distance of 111 mm.


The TS field flattener has deliberately been designed without focal reduction:



By concentrating of pure removal of field curvature, an exceptional result has been achieved without secondary abberations like coma or astigmatism. Additionally, the flattener is not limited to certain telescopes or focal lengths. It is universally usable for nearly any refractor from f/5 through f/9.



Technical details:
  • Field flattener for f/5 - f/9 refractors without influencing the focal length
  • Free aperture: 61.5mm
  • Threads on telescope side: M68 male and M63 female
  • Thread on camera side: M69 female
  • Recommended distance between camera side thread and focal plane: 91.5mm


Teleskop Service Product Number: TSFLAT2.5
Additional Information

Additional Information

SKU TS-TSFLAT2,5
Manufacturer Teleskop Service
Barrel Size 2.5"
Warranty 2 Year Warranty
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Included Items

Included Items

  • Teleskop Service 2.5" Flattener for Refractors
Questions & Answers

Product Questions

hi I was wondering will this work with gso rc10 truss I have read some wear that does work with rc10 ota but not sure. I'm looking for a flattener to go with my gso rc and qhy9 ccd I have ccdt67 that does work ok. cheers
5
What is the optical length of this flattener?
1
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