The OAJ telescopes are particularly defined for carrying out large sky surveys.The table below illustrates the main technical specifications of the two telescopes at the OAJ.
|Optical configuration||Ritchey Chrétien like, equipped with a field corrector and derotator||Ritchey Chrétien|
|M1 diameter||2.55 m||83 cm|
|FOV diameter||3 deg (476 mm physical size)||2 deg (130 mm physical size)|
|Effective collecting area||3.89 m2||0.44 m2|
|Etendue||26.5 m2deg2||1.5 m2deg2|
|Focal length||9098 mm||3712 mm|
|Plate scale||22.67 arcsec/mm||55.56 arcsec/mm|
JST/T250 (Javalambre Survey Telescope) is a 2.55 m, F#3.5 alt-azimuthal telescope with a Ritchey-Chrétien-like configuration with a large field of view of 3 deg diameter, particularly defined for carrying out large sky photometric surveys like J-PAS.
The Javalambre Auxiliary Survey Telescope (JAST/T80) is an 80cm Ritchey Chrétien telescope with a large field of view of 2 deg diameter, particularly defined for carrying out large sky photometric surveys like J-PLUS.