Askar 130PHQ Astrograph

Askar 130PHQ Quadruplet APO Astrograph:

The Askar 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.

High quality imaging optics:
130PHQ has an aperture 23mm larger than 107PHQ. 130PHQ has a focal ratio of f/7.7 and a focal length of 1000mm. The Petzval-like 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 photography. It supports a medium frame 60mm image circle, has a fine spot diagram with only tiny distortion of the peripheral stars, and its central RMS radius is less than 2 microns.

The Askar 130PHQ is a true all-rounder with f/7.7 – it is designed as a telescope for almost all applications:

• With 1000mm focal length and the large corrected field of view, extended objects can be imaged. But equally, fine details of objects can be brought out when cameras with high resolution are used.
• The use of different cameras with different flange focal lengths is no problem. Simply focus and you are always at the correct distance.
• The focuser has large travel, so you can find the focus without problems.
• The working distance or backfocus from the 2″ receptacle is long enough to use 2″ star diagonals. This turns the flatfield apo into a wide field telescope or even a planetary telescope, depending on the eyepiece used.

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

The photographic 3.4″ Rack & Pinion focuser:
The CNC focuser is optimized for photography and can handle a load of up to 8kg. The adjustment range is very generous. The focusing is done via rack and pinion which is decoupled from the bearing of the draw tube. This guarantees fine and precise adjustment even at maximum load. In addition to the 1.25″ and 2″ receptacle, the focuser also offers threads for screw on adaptations.

Every single APO is checked in the technical department before it is put into storage in order to guarantee its consistently delivered to you in the highest quality.

1. The mechanics are tested and the focuser is optimally adjusted.
   The lens is cosmetically checked and cleaned. The quality team also check that all counter screws are correctly tightened. These often loosen during transportation.
2. The optics are collimated and the result is checked on the optical bench. The telescope is given a serial number.
3. An optical test is carried out, which is enclosed with the telescope (star images and ronchi image on the optical bench in autocollimation).
   Only then are the telescopes handed over to the warehouse and prepared for dispatch.

Spec:

• Aperture size: 130mm
• Focal length: 1000mm
• Focal ratio: f/7.7
• Objective lens: Air-spaced quadruplet apo, consisting of a triplet (including two ED glasses) and a single element
• Image circle: 60mm
• Eyepiece connections: 2″, 1.25″
• Focuser: 3.4″ dual-speed rack and pinion, max. load 8 kg
• Focuser travel: 95mm
• Visual back-focus with focuser fully retreated: 148.5 mm (from the end of 2″ eyepiece holder)
• Rear-end threads: M86x1 male, M68×1 male, M54×0.75 male, M48×0.75 male
• Rear-end filter adapter: M54×0.75-M48×0.75 (M48×0.75 filter thread inside)
• Photographic back-focus from base with focuser fully retreated:    186mm (from M86×1 thread), 156mm (from M68×1 thread), 136mm (from M54×0.75 thread), 116mm (from M48×0.75 thread)
• Dew shield diameter: 169mm front, 162mm back
• Tube diameter: 146mm
• Total length with 1.25″ receptacle: 842.5mm / 889.5mm (dew shield retracted / fully stretched)
• Total length with 4-piece adapter: 1011.5mm / 1061.5mm (dew shield retracted / fully stretched)
• Finder base: Vixen style finder shoe
• Mount connection: Losmandy style dovetail plate
• Net weight: 10.2kg
• Gross weight: 12.5kg

Whats included:

1. 130PHQ OTA with adapter M86 to 2″
2. Adapter 2″ to 1.25″
3. Pair of tube rings
4. Handle
5. Losmandy style dovetail plate, length 300 mm
6. Set of 4-piece photographic adapters
7. User manual
8. Transport case