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Second Hand Ascension 127ED Triplet APO OTA - High Precision model

Second Hand Ascension 127ED Triplet APO OTA - High Precision model
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Second Hand Ascension 127ED Triplet APO OTA - High Precision modelSecond Hand Ascension 127ED Triplet APO OTA - High Precision modelSecond Hand Ascension 127ED Triplet APO OTA - High Precision modelSecond Hand Ascension 127ED Triplet APO OTA - High Precision model
Price:  £1,100.00(Inc. 20% VAT)Earn 1,100 Loyalty Points
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Model:  SHA127TRIPLET
Brand:  Ascension

Availability:  

  

Generally In Stock, Please Confirm Before Ordering


For sale we have an Ascension 127 ED Triplet in very good condition. This is the high precision model (~0.95 Strehl ratio or better) with interferometer report. Comes supplied with an upgraded 8x50 illuminated erecting finderscope, 20mm and 10mm eyepiece and aluminium flight case. The optics are free of marks, however there is some dust inside the lens, it is minor and should not affect the image. 

This is a preimum lens and is very well made, it would make an excellent scope for both imaging and observing. 

*Please not this scope does not come with the orange Geoptik losmandy bar in the picture. If you would like to purchase this bar with the scope please get in touch with us. 

 

Full Product Info

Outline
High contrast and minimal colour aberrations are both highly desirable features in a modern telescope. Triplet lens designs incorporating exotic glasses present optical systems practically free of chromatic aberration (colour fringing) and capable of pin-point star images. 

The Ascension APO (apochromatic) refractors use a high quality triplet lens objective made of premium Japanese ED (Extremely Low Dispersion) glass to achieve images of high contrast and virtually free of secondary colour. Fully (broadband) multicoated lenses ensure maximum light transmission. 
 
 
 
 
Designed with wide field observing and imaging in mind these triplet apochromatic telescopes offer an array of features including a versatile mounting system, precision 2-speed Rack & Pinion focuser and retractable dew shield. 
 
 
 
Optical Performance
The new Ascension ED Triplet refractors guarantee an RMS of 0.052 (0.9 Strehl) or better clearly outperforming diffraction-limited (RMS 0.071, Strehl 0.82) apochromatic ED refractors. In addition the High Precision (HP) range guarantees an even higher RMS of 0.36 (0.95 Strehl) or better offering unmatched value for money and excellent performance. 

In imaging terms the high quality FCD-1 objective ED triplet will bring the image in sharp focus when imaging unlike apochromatic ED refractors that rely on a doublet ED objective for imaging. 
 
 
RMS Rating Strehl Ratio Comments Note
0.094 0.710 . not diffraction limited
0.071 0.820 Rayleigh Limit (diffraction limited) good
0.057 0.880 . .
0.052 0.900 Ascension ED Triplet - Premium very good
0.047 0.920 Ascension ED Triplet - Premium Plus very good
0.041 0.940 Ascension ED Triplet - Premium Plus very good
0.036 0.950 Ascension ED Triplet - High Precision excellent
0.032 0.960 Ascension ED Triplet - High Precision excellent
0.028 0.969 Ascension ED Triplet - High Precision excellent
Ascension High Precision optics are subject to availability from the manufacturer.
The Strehl Ratio is calculated from the RMS rating value: Strehl ratio = 1 - (2π x RMS Rating)2
 

Features
The optical tube greatly benefits from metal knife-edge baffles that prevent light which has bypassed the optical system or which is outside the field of view from reaching the focal plane thus increasing image contrast. 

The Ascension 127ED Triplet comes complete with a 2" dielectric (99% reflectivity) diagonal, 8x50 wireless finder scope with adjustable illuminated reticule, dovetail, tube rings, secondary mounting platform and two wide field eyepieces, all securely kept in a sturdy aluminium case. The telescope comes complete and is ready to use out of the box, all you need is a mount or tripod. 

At f/7.5 (127mm) the focal ratio of the Ascension 127ED Triplet is well suited for wide field astrophotography. 
 
 
 
 

Focuser
The telescope comes with a high quality rotatable CNC machined 2" hybrid Rack & Pinion focuser with a very high load capacity. This 11:1 dual speed focuser is very smooth to operate, thus making focusing accurate and precise. 

The focuser comes with a 2" to 1.25" adapter, both 2" and 1.25" drawtubes have copper rings to better secure attached accessories including diagonals, eyepieces, cameras, filter-wheels etc. 

This improved design incorporates a central hand-operated locking mechanism and two hand-operated pressure mechanisms on either side of the focuser to increase the pressure by spreading the load as required. 
 
 
 
Ascension Specification Comparison Chart
Specification Ascension 80ED Triplet - Bundle Ascension
102ED Triplet - Bundle
Ascension
127ED Triplet - Bundle
Ascension
127ED Triplet CF - Bundle
Optics ED Triplet ED Triplet ED Triplet ED Triplet
Coatings Fully-multicoated Fully-multicoated Fully-multicoated Fully-multicoated
Aperture 80mm 102mm 127mm 127mm
Focal Length 480mm 714mm 952.5mm 952.5mm
Focal Ratio f/6 f/7 f/7.5 f/7.5
Focuser Type 2-speed Rack & Pinion (11:1) 2-speed Rack & Pinion (11:1) 2-speed Rack & Pinion (11:1) 2-speed Rack & Pinion (11:1)
Focuser Drawtube 2" with 1.25" adapter 2" with 1.25" adapter 2" with 1.25" adapter 2" with 1.25" adapter
Focuser Design Rotatble Rotatble Rotatble Fixed
Focus Travel 12cm 12cm 12cm 12cm
Baffles Knife-edge Knife-edge Knife-edge Knife-edge
Tube (LxWxH) 38x9x9cm 59x13x13cm 85x16x16cm 85x16x16cm
Length with extended dew-shield 48cm 74cm 106.5cm 106.5cm
Focuser assembly width 15cm 15cm 15cm 15cm
Weight w/supplied rings & dovetail -- 5kg 7.5kg 7kg
Weight w/supplied rings -- -- -- --
Weight w/ 1/4" tripod support -- -- -- --
Weight w/ dovetail 2.75kg -- -- --
Finder scope and bracket 8x50 illuminated 8x50 illuminated 8x50 illuminated 8x50 illuminated
Dielectric 2” diagonal & 1.25” adapter 99% reflectivity 99% reflectivity 99% reflectivity 99% reflectivity
Wide-angle 70° 1.25" eyepieces 10mm & 20mm 10mm & 20mm 10mm & 20mm 10mm & 20mm
Case Aluminium Aluminium Aluminium Aluminium
 
 

 

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