Astronomical instruments features

NB: These instruments can only be booked with the accommodation at Casa Astro La Palma.

Know more about Holiday accommodation

Your favourite eyepieces and filters are welcome to complete the list of accessories

Horizon sud bien dégagé
Horizon sud bien dégagé
Booking instruments prices per nightper week
(7 nights)
Dobson T300 Orion SkyQuest XT12i IntelliScope25 €150 €
Equatorial mount Skywatcher AZ-EQ6GT15 €90 €
Description of the instruments below
Plateforme astro
Plateforme astro

 ORION SKYQUEST XT12i IntelliScope TELESCOPE

Here are its features i prefer :

● Dobson mount with good weight-size ratio (no need of step stool)
● aperture around 12 inches for better profitability against turbulence
● easy object locating technology (starry fieds here can be confusing and it’s a help for southern constellations)
● no motorization (no noise, no electronic trouble, manual pointing is normally quicker after initialization procedure)

Optical specifications :

– Newton (Dobson mount)
– Primary Pyrex mirror : 305mm
– Reflectivity ratio : 94% with SiO2 enhanced coating
– Secondary mirror (minor axis) : 70mm
– Finder scope : 9×50 right-angle correct-image, prealigned (Field = 5°)
– Focal length : 1500mm
– Focal ratio : f/4.9
– Obstruction (without spider effect) : 0.23
– Resolution power : 0.39”
– Limit stellar magnitude : 15.1
– Minimum & maximum amplifications : 43x & 610x
– Eyepieces : Sirius Pl 20mm (31.7), Sirius Pl 10mm (31.7), ultrawide Sky-Watcher 6mm (31.7)
– Barlow lens : 2x ED Sky-Watcher (2”)
– Magnifications : 60x, 120x, 150x, 250x, 300x and 500x

This instrument is diffraction limited (λ/4 – λ /5 controlled at the star test) and collimated.

Mechanical specifications :

– Rolled steel optical tube
– 9 points mirror cell
– Focuser : Crayford 50.8/31.7mm
– Eyepiece rack : 3 holes
– Pointing electronic assistance (encoders system + hand controller)
– Locating precision : into constructor tolerances
– Database objects : 14000 (NGC/IC mainly + 99 exotic objects, in construction)
– Manual guiding

Others specifications :

– Tube length : 58” (147cm)
– Total weight : 83lb (37.7 kg)
– Instruction manual in english + technical sheet (alignment procedure)

The 12” is always fully mounted and movable everywhere on the field.


SKY-WATCHER AZ-EQ6 GT Mount (2017)

This german equatorial mount has good press in imagers circles. Here are its features they prefer :

● ease of use
● reliable without troubles on the field
● honest tracking performance even in long time exposure (autoguide outlet included)
● possible setting to Alt-azimuth Mode (easiest in tracking & GOTO, visual mode)
● allowed to disable/enable automatic mode for manual mode witout loosing mount’s alignment status (Auxiliary encoders)
● possible installation a secondary instrument in alt-azimuth mode
● good charge capacity – size ratio
● movable everywhere on the observation field (fair weight)
● verified and controlled by french specialist Pierro Astro

Mechanical specifications :

– Equatorial and Alt-azimuth Dual Mode
– Notched driving belt transmission system + 2 blocks + worm drive
– Motorization double axis + GOTO pointing
– Micro-step motor resolution : 0.14”
– Permanent PEC
– Brass gear (RA/DEC) 180 teeth , 92.5mm diameter
– Periodic error : ± 6″ (quality report on the spot)
– Steel axis 40mm diameter
– Dual-fit saddle : VIXEN/LOSMANDY (id. for secondary saddle)
– New polar scope, illuminated with engraved lens (equinox years)
– Latitude adjustment range : 10° to 75° (equatorial) and 90° (azimuth)
– Azimuth adjustment range : ± 9°

Electronic specifications (GO-TO system) :

– Alignment method : on 1, 2 or 3 stars (2 in Altaz)
– 2 auxiliary encoders (coordinates are kept permanently)
– Control handbox SYNCAN updated (v4.39) with 42900 celestial objects (M, NGC, IC, Sun, Moon and planets)
– Tracking rate : sidereal, lunar and solar
– Advanced Functions : Park, PAE Synchronization (Pointing Accuracy Enhancement), Backlash, Identification, Tour…
– Pointing accuracy : 5’ RMS or 1’ with PEC
– Maximum sleewing speed : 3.4°/s
– Auto-guiding speeds : 0.125x 0.25x 0.5x 0.75x et 1x
– GPS Celestron Nexstar protocol compatible
– PC connection (RS-232C) via EQMOD

Others specifications :

– Inox tubular tripod (33.5 inches < height < 58 inches)
– Charge capacity : 42lb, 35lb in astrophotography ( SCT type C11, Maksutov until 180mm or 10” Newton)
– Total weight : mount head (34 lb), tripod (16.5lb) and counterweights (2×11.2lb)
– Power requirement : 12V DC vehicle power cable or DC 11-16V 4A
– Instruction manual in english + technical sheet (simplified polar alignment setting, in french)

Mechanical plays are adjusted and electronic board controlled. The polar scope is calibrated.