TS 65mm f/6.5 Cuatriplete Astrógrafo - 65mm apertura / 420mm focal
... Telescopio 4 elementos APO con corrección de campo perfecta para astrofotografía - Enfocador 2" RP - FPL53 glass

The TS Quadruplet Astrograph 65mm f/6.5 offers a highly corrected focal plane for astro photography and is therefore an interesting alternative e.g. to the Takahashi FS-60 or the Pentax 75 SDHF. It is fine crafted and optimal for mobile deep-sky imaging featuring a minimum mechanical length of 340 mm (with retracted dew cap). Image quality on- and off axis is perfect and the very low chromatic abberation allows a visual magnification range up to 150x.

TS APO 65 Q advantages:
-- fully corrected triplet lens group for colour-free imaging
-- integrated field flattener (4th lens) for a corrected fiels up to full-size sensors
-- optimized flattener position inside the tube for best effect
-- optimized baffles without vignetting
-- 2" dual speed focuser for high loads - no slipping, no shifting
-- 360° rotation possibilitiy for ideal framing
-- CNC tube rings and GP-style prism rail with foto thread
-- finder shoe (Vixen/Celesstron/Skywatcher compatible)

2" RP focuser:


This focuser combines the advantages of a rack & pinion focuser with an improved bearing system. A Crayford design has its optimal stiffness only when the drive shaft is pressed firmly against the rail - this causes bucky operation. The fine machined cograil allows smooth focusing even under heavy loads up to 3 kg.

The focuser also features a 2" and 1.25" receptacle with brass compression rings. 2" accessory is locked by two thumbscrews - this prevents tilting.

The 65mm Quadruplet's optical system - four lenses in two groups:


For this lens system FPL-53 glass is used for optimal colour correction. Stars are free of colour fringes and halos which may occur with camera-side corrector applications.

The fixed internal ED flattener causes an optimal image correction for sensor with a diagonal up to 44 mm. With a separate lens brought into the focuser, this can hardly be reached. This highly corrected system is additionally supported by a adequate baffling system

Technical details:


-- Aperture: 65mm
-- Focal length: 420mm
-- Photographic speed: f/6.5
-- Diameter of the corrected field: 44mm
-- Weight: 2.8 kgs (with tube rings and prism rail)
-- Focuser: 2" RP with improved bearing, 360° rotation and ring clamping
-- Mechanical length: 340/375 mm with retracted/extended dew cap
-- Resolution: 1.78 arc seconds
-- Limiting visual stellar magnitude: 11m6
-- Dovetail rail for GP-style mounts and standard photo tripod threads (1/4")

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