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.72x Quad-Telecompressor Corrector

  • 1,52000

This item is out of stock but you can place an order now and we’ll ship when it becomes available.

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0.72x Quad Telecompressor Corrector for: 
** 130 StarFire GTX and EDFGT (with 3.5" Focuser) Refractors (QUADTCC-AP130)
** 140/160/180 Telescope Engineering Company Refractor (QUADTCC-TEC140/160/180)

Expand your field!   Reduce your f/value, speeding up the collection of photons!  And do it with pin-point stars all the way to the corners of your full frame 35 mm sensor!

The new Quad TCC (four element Telecompressor Corrector) when coupled with the Astro-Physics 130 Starfire GTX is an imaging machine at f/4.5 and a focal length of 585 mm.  It covers an approximate 3.5 x 2.4 degree field when using a full frame 35 mm sensor and an amazing 3.5 x 3.5 degrees when using a 16803 sensor!  There will be no need to mosaic your images, but when you do…Wow! 

Four carefully matched glass elements are carefully figured and then coated with the very latest multi-coatings to produce this optical wonder.  All mechanical parts, including the covers, are CNC machined and black anodized with a lustrous finish.


The Quad TCC takes advantage of Astro-Physics' new 3.5” focuser to provide coverage of a full frame sensor.  130 Starfire EDFGT owners can celebrate with the knowledge that their 2.7” focusers can be upgraded with the 3.5” focuser and then also use the Quad TCC.

We believe in spreading the imaging fun around.  The Quad TCC will also work with Telescope Engineering Company’s APO 140ED f/7 scope, making it a 700 mm, f/5 flat-field imaging scope!  No fancy modifications are needed…simply attach our Drawtube Endcap (S35RFAA) to TEC’s Starlight Instrument focuser, then slip in the Quad TCC and you’re ready to go.  The TEC 160 and TEC 180 scopes with the Starlight Instruments 3.5” focuser can also employ the Quad TCC (a different backfocus spacer will need to be used).  The fun just goes on!

QuadTCC above shown with scope Backfocus Spacer.


The backfocus spacing (as measured from the rear flange of the backfocus spacer) is 80.8 mm +/- 1.0 mm.

Schematic showing Backfocus Spacer and Adapter spacing.

The male threads are 3.270" x 16.
Field of View with 130 Starfire GTX (at f/4.5):
 Fully Illuminated Circle 2.0” (50 mm) 4.9° (294 min.)
KAF-8300 18.0 x 13.5 mm 1.8° x 1.3° (106 x 79 min.)
APS-C 22.3 x 14.9 mm 2.2° x 1.5° (131 x 88 min.)
35 mm Full Frame CCD 36 x 24 mm 3.5° x 2.4° (211 x 145 min.)
KAF-16803  36.8 x 36.8 mm 3.5° x 3.5° (211 x 211 min.)
 Click Image for larger view.

Field of View with TEC APO140ED (at f/5):
 Fully Illuminated Circle 2.0” (50 mm) 4.1° (245 min.)
KAF-8300 18.0 x 13.5 mm 1.5° x 1.1° (88 x 63 min.)
APS-C 22.3 x 14.9 mm 1.8 ° x 1.2° (110 x 73 min.)
35 mm Full Frame CCD 36 x 24 mm 3.0° x 2.0° (177 x 121 min.)
KAF-16803   36.8 x 36.8 mm 3.0° x 3.0° (177 x 177 min.)
 Click Image for larger view.

Scope Part Code Backfocus Spacer Spacing with Bf. S. Spacing without Bf. S.
AP 130 GTX QUADTCC-AP130  22.1 mm 80.8 mm 102.9 mm
TEC 140 QUADTCC-TEC140 18.3 mm 80.8 mm 99.1 mm
TEC 160 QUADTCC-TEC160 17.0 mm 80.8 mm 97.8 mm
TEC 180 QUADTCC-TEC180 16.0 mm 80.8 mm 96.8 mm
Important Note: When purchasing the QuadTCC the proper length Backfocus Spacer is included for the scope specified. However, when ordering the QuadTCC for a TEC scope you will also need to order a Drawtube Endcap (S35RFAA) for the focuser (see part listing below). This only applies to the TEC focusers. This part is integral to the Astro-Physics 3.5" focusers and is not needed as a separate purchase. The S35RFAA screws onto the drawtube's 4.100" x 24 thread (same as Starlight Instrument's 3.5" focuser endcap thread). 

If you have multiple scopes from the list above and wish to purchase a Backfocus Spacer separately in order to use the QuadTCC on the different scopes, below are the spacers listed by length (reference the table above) and corresponding part number.
Backfocus Spacer Length Part Number
22.1 mm A5020
18.3 mm A2680
17.0 mm A5022
16.0 mm A5023
Adapters for CCD Field Flatteners and Telecompressor Correctors: ADATCC1, ADATCC2, ADATCC3, ADATCCEOS, A3513-A , ADATCCNIK

Endcap (S35RFAA) for TEC Scopes


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