Celestron Schmidt-Cassegrain telescope SC 127/1250 AZ GoTo Astro Fi 5

AstroFi - SC 127

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  • Celestron Schmidt-Cassegrain telescope SC 127/1250 AZ GoTo Astro Fi 5

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Celestron Schmidt-Cassegrain telescope SC 127/1250 AZ GoTo Astro Fi 5

Product description:

Celestron SC telescopes:

Despite the long focal length of these telescopes, the OTA itself has a very short length, making the system a compact telescope which is extremely easy to transport. Light first hits an aspherically figured Schmidt corrector plate and is then thrown onto a spherical main mirror. This reflects the light back up, throwing it onto a secondary mirror which subsequently throws it back in the direction of main mirror. The light then passes through a central hole in the main mirror and into the focuser at the bottom of the OTA. Thus the system is closed and hence does not suffer from air turbulence which could degrade the image. Of course this also means that the system is optimally protected from dust. The Schmidt plate is multi-coated, ensuring bright images which do not suffer from stray light reflections.

This telescope provides a very good image, boasting high contrast and definition and provides a lot of pleasure when planetary observing. The Schmidt-Cassegrain design provides a good all-round system suitable for both observing and astrophotography andwith an enormous range of optional accessories available. Using the bottom end of the OTA to look through means easy orientation. The system is also optimal for occasional terrestrial observing, e.g. birdwatching at close range. Celestron SC telescopes have an aperture ratio of around 1:10 which, so astrophotography is also very easily possible.

Main mirror focusing means a very large range of focus is made available, which allows virtually any common accessory to be used. Two pre-loaded ball bearings are used in the main mirror focus positioning mechanism in order to prevent 'mirror shift' - a typical problem when using simple bushings. The use of high quality materials such as CNC-milled aluminium components, cast steel and stainless steel guarantees extreme robustness with low weight. This means that a very heavy mount is unnecessary, not always the case for other telescope designs.

Features of these telescopes:

  • long focal length with short OTA
  • low weight aluminium OTA
  • high quality XLT multi-coating
  • closed system
  • pre-loaded ball bearings for low mirror shift main mirror focusing

Video : AstroFi / 127 SC



Type Reflector
Type of build Schmidt-Cassegrain
Aperture (mm) 127
Focal length (mm) 1250
Aperture ratio (f/) 10
Resolving capacity 0,92
Limit value (mag) 12,3
Light gathering capacity 320
Max. useful magnification 250
Coating Starbright XLT
Tube length (mm) 330
Tube material Aluminium


Connection ( to eyepiece) 1,25"
Type of build Internal
Rotating no
Motorized no
Gear reduction without


GoTo control yes
Mounting type Azimuthal
Type of build Single tine
Load capacity (kg) 5

GoTo control

Tracking speeds sideral, solar and lunar
GPS yes
Database > 120.000
Alignment method SkyAlign, 3-Star Align, Solar System Align
Hand controller optional
GoTo Language multilingual
Software SkyPortal
WIFI yes


Material Aluminium
Accessory plate yes

Included accessories

Finder scope Red dot finder
1.25'' eyepieces 25mm, 10mm
Battery compartment yes
Deviating optics 1.25", 90° star diagonal


Series Astro Fi

Area of application

Astrophotography no (Moon & Planets)
Moon & Planets yes
Nature Observation no
Nebulae & galaxies yes
Sun no (Only with appropriate Sun filter)

recommended for

Beginners yes
Advanced no
Experienced amateurs no


Battery type Mignon (AA, LR6)