0.72x Quad Telecompressor Corrector

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0.72x Quad Telecompressor Corrector

# 1405380

€ 2,250.00 Price excl. German VAT tax (19%): € 1,890.76
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Important note: This product is not available online because an adaptation is required. If you are interested, please send us a inquiry incl. contact data by email.

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0,72x Quad Telecompressor Correktor from Astro-Physics

0,72x Telecompressor Correktor for TEC refractors:

  • This Reducer/Corrector reduces the focal length of the 140mm f/7 from 980 mm to 700 mm and gives you a focal ratio of f/5. For a full frame camera (24 x 36 mm), this results in a field of view of 3 x 2 degree at an image circle of 50 mm, diffraction limited and free of vignetting. Has Starlight Instruments 3.5" focuser, so requires the 0,72x telecompressor and 3.5" Rotating Focuser Accessory Adapter (#1405375, € 175,-) .
  • This Reducer/Corrector reduces the focal length of the 160mm f/7 from 1.120 mm to 800 mm and gives you a focal ratio of f/5. For a full frame camera (24 x 36 mm), this results in a field of view of 1.7 x 2.6 degree at an image circle of 50 mm, diffraction limited and free of vignetting Has Starlight Instruments 3.5" focuser, so requires the 0,72x telecompressor and 3.5" Rotating Focuser Accessory Adapter (#1405375, € 175,-) .
  • This Reducer/Corrector reduces the focal length of the 180mm f/7 from 1.260 mm to 900 mm and gives you a focal ratio of f/5. For a full frame camera (24 x 36 mm), this results in a field of view of 1.5 x 2.3 degree at an image circle of 50 mm, diffraction limited and free of vignetting. Has Starlight Instruments 3.5" focuser, so requires the 0,72x telecompressor and 3.5" Rotating Focuser Accessory Adapter (#1405375, € 175,-) .

 0,72x Telecompressor Correktor for 130GTX:

  • This Reducer/Corrector reduces the focal length of the 130 GTX from 820 mm to 585 mm and gives you a focal ratio of f/4.5. For a full frame camera (24 x 36 mm), this results in a field of view of 3.5 x 2.4 degree at an image circle of 50.2 mm, diffraction limited and free of vignetting.
 Reducer/Korrektor

Backfokus Distanzstück und Adapter

As with all optical systems which change the focal length, the distances between lenses and camera sensor have to be kept as exact as possible.

There is a special backspacer ring available for this telecompressor. Its optical length is exactly 16 mm. The necessary distance from the back of this backspacer to the image plane is 80.8 +/- 1.0 Millimeter. To attach your camera, you need one of the following five adapters. If you require more backfocus, you can leave out the backspacer - then, the required backfocus is 96.8 +/- 2.5 mm. Flattener and backspacer do end in a 3.3 inch male thread.

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

Determine the appropriate Backfocus Spacer for the telescope that you plan to use and purchase it separately.

Scope Focuser or Adapater required Backfocus Spacer required
Backfocus Spacing
Spacing with Backfocus Spacer Spacing without Backfocus Spacer
AP 130 GTX None Backfocus Spacer for 0,72x Quad Telecompressor Corrector (various versions) (various versions available) 22.1 mm 80.8 mm 102.9 mm
TEC 140 0,72x telecompressor and 3.5" Rotating Focuser Accessory Adapter (#1405375, € 175,-) Backfocus Spacer for 0,72x Quad Telecompressor Corrector (various versions) (various versions available) 18.3 mm 80.8 mm 99.1 mm
TEC 160 0,72x telecompressor and 3.5" Rotating Focuser Accessory Adapter (#1405375, € 175,-) Backfocus Spacer for 0,72x Quad Telecompressor Corrector (various versions) (various versions available) 17.0 mm 80.8 mm 97.8 mm
TEC 180 0,72x telecompressor and 3.5" Rotating Focuser Accessory Adapter (#1405375, € 175,-) Backfocus Spacer for 0,72x Quad Telecompressor Corrector (various versions) (various versions available) 16.0 mm 80.8 mm 96.8 mm

 Tec Adapter; width=

To adapt the new reducer/corrector to a TEC refractor, you must replace the end piece of the focuser. Simply unscrew the original end piece and replace it with the new one.

The 0,72x telecompressor and 3.5" Rotating Focuser Accessory Adapter (#1405375, € 175,-) must ordered on its own. It is NOT included with the reducer/corrector.

If you have any questions about attaching your accessories, please give us a call or send us an email.

 

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Specifications

Additional Information

EAN Code 4047825051080
Manufacturer Astro Physics
SKU (#) 1405380
Net weight (kg) 1.59
Optical Design Telecompressor
compatible telescopes Refractors
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