Askar 130PHQ 130mm f/7.7 Quadruplet Flat-Field Astrograph

130PHQ is a long-focal-ratio, flatfield astrograph newly launched after 107PHQ. Instead of buying extra flatteners, calculating the backfocus of flattener or making tedious connection to match the distance, astrophotographers can simply equip it with any possible imaging devices, make the target stay at the focus, and then the whole optical system is perfect for imaging.

130PHQ has a larger size than 107PHQ, with an aperture 23mm larger than 107PHQ. 130PHQ has a focal ratio of f/7.7 which is longer than 107PHQ s f/7, and a focal length of 1000mm. The quadruplet lens with two ED glasses offers excellent control of chromatic and other aberrations. With its self-flattening design, 130PHQ offers strong advantages in astronomical shooting. It supports a medium frame 60mm image circle, has a fine spot diagram with tiny distortion of the peripheral stars, and its central RMS radius is less than 2 microns.

130PHQ comes with a telescopic lens hood, a high quality CNC machined and painted tube and attractive decorative parts. The 3.4″ rigid focuser comes with M68, M54, and M48 adapters and a finder base. When used with the 3″ 0.7 x flat field reducer, the telescope can reach a focal ratio of f/5.4 and a focal length of 700mm, effectively reducing exposure time. The multifunctional handle comes with a central slot for attaching an M6 screw with an M6 screw hole. Standard Losmandy dovetailplate, together with sturdy double tube ring, is perfectly suited for viewing and shooting.

Aperture size130mm
Focal length1000mm
Focal ratiof/7.7
Objective lensQuadruplet air-spaced APO (including two ED glass)
Image circle60mm
Maximum accessory connection (with the focuser fully retreated)
1. Imaging mode:
116mmfrom the base of M480.75 male thread
136mmfrom the base of M540.75 male thread
156mmfrom the base of M681male thread
186mmfrom the base of M861 male thread
2. Observing mode:
148.5mmfrom the end of 2″ eyepiece holder
Total length
842.5mmincluding 1.25″ eyepiece holder as dew shield contracted
889.5mmincluding the 4-piece adapter as dew shield contracted
1011.5mmincluding 1.25″ eyepiece holder as dew shield fully stretched
1061.5mmincluding the 4-piece adapter as dew shield fully stretched
Net weight10.2kg
Gross weight12.5kg
Rear-end thread type
M861-M681
M681-M540.75
M540.75-M540.75
M540.75-M480.75M480.75 filter thread inside
Standard package itemsan 130PHQ OTAa pair of tube rings, a handle, an Askar losmandy300mm dovetail plate, a set of 4-piece photographic adapters, a manual,analuminumbox