Askar 107PHQ 107 mm F/7 Quadruplet Flatfield Super APO Astrograph
The 107PHQ is a transportable APO refractor for astrophotography with corrected field of view up to full frame sensor and for observation up to the highest magnification range.
♦ Aperture 107 mm - focal length 740 mm - focal ratio f/7
♦ 4-element Petzval system with color-correct triplet objective and a corrector lens built into the optical tube
♦ Stable 3.4" RAP focuser with micro-reduction and 360° rotation - adjustment range 110 mm
♦ Sufficient working distance for observing with 2" accessories and for photography
♦ Besides 1.25" and 2" the apo offers M48, M54, M68 and M86 threads for screw adaptions
♦ 44 mm image circle with full illumination and correction allow the use of large sensors with high resolution
♦ CNC tube rings with Vixen/EQ5 style dovetail bar and carrying handle
♦ Finder shoe for standard finder and mini guiding telescopes available
♦ High quality carrying case for optimal protection of the telescope
♦ Each Quadruplet Apo is inspected and its optics tested before shipping - you get an optimally adjusted telescope for successful photography and observation from the very beginning.
Description
Askar 107 mm f/7 Petzval Astrograph
The 107PHQ is the successor of the legendary TS 107/700 mm apo. The manufacturer has further developed the apo and made a powerful astrograph out of it. Remained is the color-correct triplet objective with 107 mm aperture. Due to the built-in corrector the field is very well corrected. You will have perfect star imaging in the field right from the start, without tedious searching for correctors and the right distance.
The apo provides perfect star reproduction on the optical axis and in the field and is also very good for visual observation. Magnifications up to over 300x are feasible, with good contrast.
Astrophotographic results obtained with this telescope on Astrobin
Here you can find some astrophotographs made with this telescope model: Link to Astrobin
The Askar 107PHQ is a real all-rounder with F/7
A telescope for almost all applications, that´s exactly what the 107PHQ is built for.
♦ With 740 mm 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 adapter battle is eliminated.
♦ 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.
The photographic 3.4" rack&pinion focuser:
The CNC focuser is optimized for photography and can handle a load of up to 8 kg. The adjustment range is very generous at 110 mm. 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 adaptations.
The back focus is always measured with the focuser tube completely retracted:
♦ 79 mm from M48x0.75 male thread
♦ 99 mm from M54x0.75 male thread
♦ 119 mm from M68x1 male thread
♦ 149 mm from M86x1 male thread
♦ 120 mm from 2" connection
This is how we hand over the apo to the star lover:
Each and every AS107PHQ Quadruplet Apo is inspected in our engineering department before being stocked to ensure consistent high product quality.
♦ The mechanics are tested, the focuser is adjusted optimally.
♦ The objective is cosmetically checked and cleaned. In addition, it is checked whether all counter screws are correctly tightened. Often these loosen during transport.
♦ The optics are collimated and the result is checked on the optical bench.
♦ Only then are the telescopes transferred to the warehouse and prepared for shipment.Specifications
Aperture: 107 mm Focal length: 740 mm Focal ratio: F/7 Lens: Air-spaced triplet lens Corrector: Single element corrector Coating: All surfaces are multicoated Illuminated and corrected field of view: 44 mm diameter Backfocus: Maximum distance 149 mm from the M86x1 thread Connections on camera side: 1.25", 2", M86x1, M68x1, M54x0.75 and M48x0.75 threads Focuser: Adjustment range 110 mm Filter thread: 2" filter thread is included in the M48 camera adapter Diameter dew shield: 134 mm Weight: 7 kg incl. rings and dovetail Case weight: 4 kg In the box
♦ 107PHQ apo
♦ CNC tube rings with carrying handle and dovetail bar
♦ Finder shoe mounted on the focuser
♦ Carrying case
♦ Manufacturing protocol of the manufacturer
