The 2" CCD compressor reduces the focal length of telescopes with the factor 0.67x, thus allowing significantly shorter exposure times.
♦ The focal reducer is perfectly suitable for RC telescope. It also works good with Celestron EHD or Meade ACF telescopes or with refractors up to the focal ratio F/9
♦ The image field of DSLR cameras up to APS-C format is illuminated - full illumination up to 29 mm
♦ Easy connection to the telescope via 2" barrel
♦ Optimal working distance from the M48x0.75 thread to the camera sensor is 85 mm - enough space for accessories like off-axis guider or filter wheel
♦ 2" filter thread at the telescope side
TS-Optics CCD telecompressor for Ritchey-Chrétien and other F/18 to F/8 telescopes
The TS telecompressor CCD47 was developed for reducing the focal length of RC (Ritchey-Chrétien) telescopes. Practical tests have also shown an excellent suitability for all telescopes with flat field, like apochromats with built-in corrector lens, Celestron EHD or Meade ACF telescopes, thus the most flat-field telescopes. We especially recommend the compressor for the GSO / TS Optics / AstroTec Ritchey-Chrétien telescopes.
The features of the CCD47 telecompressor:
♦ Barrel size is 2" - easy connection to all focusers with 2" receptacle
♦ With thread for 2" filters at the telescope side
♦ Camer aconnection via M48x0.75 thread
♦ Optimal working distance from the connection thread: 85 mm to the camera sensor. Between 70-90 mm, the results are very good.
♦ Reduction by 0.67x - an RC with F/8 changes to fast f/5.3. A telescope with F/10 still turns into F/6.7. The exposure time will be more than halved!
♦ An illuminated image field of 29 mm allows using all camera sensors up to APS-C format.
Adapter recommendations:
With the long working distance, adaptation of all common cameras, no matter whether CCD or DSLR, is possible without any problems. Some examples of applications:
♦ DSLR camera - adaption via M48: TSVF230 and then the matching adapter from M48 to the camera, like the SKM48-EOS for connecting a Canon EOS
♦ CCD cameras via T2 connection: two adapters are possible for reducing the M48 thread to T2:
TSFA2 - adapter to T2 with 38.2 mm length. This is used for bridging optical path.
TSM48-T2 - a short adapter with only 3.5 mm length. This is applied if accessories like off-axis guider and filter wheels should be used.
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Barrel size: |
2" |
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Filter thread: |
2" filter thread at the telescope side |
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Camera connector: |
M48x0.75 thread (male, 5 mm long) |
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Body length: |
29.2 mm (w/o male thread) |
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Working distance: |
Between 70-90 mm - optimal results are achieved at approx. 85 mm |
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Factor: |
0.67x |
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Clear aperture: |
44 mm |
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Coating: |
Best possible coating - guaranteed no reflexes or ghost images |
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Illumination at f/8: |
D=29 mm fully illuminated |
