TS-Optics CF-APO 90mm f6 FPL55 Triplet APO Refractor with Certificate

Product code: TSCFAPO90
in stock
£1,299.00 UK Price
£1,082.50 (ex. VAT) International Price
PayPal Checkout
You will earn 1299 loyalty points with this purchase

Product information

Teleskop Service ED Triplet refractor with 90 mm aperture and 540 mm focal length offering good optical and mechanical performance for astrophotography and amateur astronomy

Aperture 90 mm
Focal length 540 mm / focal ratio f/6
First-class colour correction with FPL55 triplet lens
Internal baffles
High quality metal tube with CNC tube rings
Retractable dew shield
2.5" RAP focuser - ball bearing with M63x1 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 90/600 mm FPL55 Triplet Apochromat

The 90 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 practise cannot be distinguished from the world-famous LZOS lenses from Russia.

The compact apo is only slightly larger than apos with 80 mm aperture, but offers a much better performance in the sky. This refractor is an ideal travelling telescope due to the retractable dew cap and a transport length of a good 400 mm.

The objective of the 90 mm apo:

The triplet lens with 90 mm aperture and 540 mm focal length fulfils the criteria of a full apo. Even at magnifications of 300x, 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 2.5" rack&pinion focuser:

The 2.5" CNC focuser is optimised 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 motorised focusing for the focuser. An M63x1 internal thread is available for screwed adaptations. The focuser also offers 360° rotation for selecting the correct image section.

Astrophotography with the apochromat

To achieve the optimal imaging in the field, a corrector is needed. The corrector is screwed directly to the M63 thread of the apo. We recommend two correctors, both are suitable for cameras up to full format. The working distance from the M48 thread to the sensor is 55mm.

♦ TSCFRED90 - 0.8x corrector
The corrector is specially calculated for this APO. It reduces the focal length to 432mm and improves the focal ratio to f/4.8.

♦ TSFLAT25del - 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 to the sensor is 55mm.

  • Aperture:90 mmFocal length:540 mm
  • Focal ratio:f/6
  • Objective:Multicoated APO triplet lens - FPL55
  • Tube:CNC metal tube
  • Limiting magnitude:12.3 mag
  • Resolution:1.29"
  • Weight tube alone:3.54 kg
  • Weight with tube rings, dovetail bar and handle:4.6 kg
  • Dew shield:retractable - can be fixed with one screw
  • Focuser:2.5" CNC focuser
  • Connections on the eyepiece side:2", 1.25" and M63x1 female thread

Note: Altair reserves right to change price or specification without notice.

Product Info

Product Code TSCFAPO90
Delivery Weight Package