APO 70 mm f/6 FPL55 Triplet APO Refractor

Codice articolo: TSCFAPO70

The apochromatic refractor with 70 mm aperture and 420 mm focal length offers highest optical and mechanical performance for astrophotography and amateur astronomy

♦ Aperture 70 mm

♦ Focal length 420 mm / focal ratio f/6

♦ First-class color correction with FPL55 triplet lens

♦ Internal baffles

♦ High quality metal tube with CNC tube rings

♦ Retractable dew shield

♦ 2" RAP focuser - ball bearing with M54x0.75 connection thread for screw adaptions

♦ Micro-reduction and 360° rotation of the focuser

♦ Each TS-Optics CF-APO comes with a test certificate and serial number

♦ Sturdy transport case, carrying handle and dovetail bar included in delivery

♦ 0.8x corrector for astrophotography available - specially calculated for this telescope

TS CF-APO 70/420 mm FPL55 Triplet Apochromat
The 70 mm apo is pure in colour and bright in light and is equally suitable for visual observation and astrophotography. Thanks to the FPL55 APO element (comparable to FPL53) the image is first-class and in practice cannot be distinguished from the world-famous LZOS lenses from Russia.

The smallest apo of the TSCF series convinces with features that are normally only expected in larger apos. The image is color-free and puts even expensive telephoto lenses in the shade, with the appropriate correctors. But also the mechanics and the focuser meet highest demands. The small apo is suitable for small tracking mounts, like the SkyGuider from iOptron, the EQ3 or also for good photo tripods.

The objective of the 70 mm apo:
The triplet lens with 70 mm aperture and 420 mm focal length fulfils the criteria of a full apochromat. Even at magnifications of 220x, the image is free of annoying chromatic aberrations. Even bright stars are shown on astrophotos without disturbing blue fringes.

The APO element consists of FPL55. A further special glass supports chromatic correction. The air-spaced triplet objective is fully adjustable. Each optical glass-air surface is multi-coated. The objective is in a temperature compensated, adjustable cell.

The photographic 2" rack&pinion focuser:
The 2" CNC focuser is optimized for photography and can handle a load of up to 6 kg. The adjustment of the draw tube is done by gear drive. We also offer motorized focusing for the focuser. An M54x0.75 internal thread is available for screwed adaptations. The focuser also offers 360° rotation for selecting the correct image section.

Astrophotography with the apo
To achieve the optimal imaging in the field, a corrector is needed. The corrector is screwed directly to the M92 thread of the apo. We recommend two correctors, both are suitable for cameras up to full format.

♦ TSCFRED70 - 0.8x corrector
The corrector is specially calculated for this apo. It reduces the focal length to 336 mm and improves the focal ratio to f/4.8. The working distance from the M48 thread is 55 mm.

♦ TSFLAT72 - 1.0x corrector
The corrector provides maximum illumination. It does not change the focal length and focal ratio. The working distance from the M48 thread is 55 mm.

Technical Data

Aperture: 70 mm
Focal length: 420 mm
Focal ratio: f/6
Objective: Multicoated APO triplet lens - FPL55
Tube: CNC metal tube
Weight: 2.6 kg
Dew shield: retractable - can be fixed with one screw
Focuser: 2" CNC focuser
Connections on the eyepiece side: 2", 1.25" and M54x075 female thread
OTA lenth: 30 cm
Tube diameter: 76 mm
Dew cap diameter: 88.5 mm
Transport case dimensions: 41 x 26 x 19 cm

In the Box

♦ TS 70/420 mm apochromat metal tube
♦ CNC tube rings
♦ Carrying handle
♦ Vixen style dovetail bar
♦ Transport case