Currency: EUR

CF-APO 90 mm f/6 FPL55 Triplet APO

Temporarily out of stock


TS-Optics CF-APO 90 mm f/6 FPL55 Triplet APO Refractor with Certificate

1 719,00 €
Estimated delivery time 3-18 days

Product description

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 practice 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 traveling 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 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 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

Product details

Aperture:90 mm
Focal length:540 mm
Focal ratio:f/6
Objective:Multicoated APO triplet lens - FPL55
Tube:CNC metal tube
Limiting magnitude:12.3 mag
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, 95 mm travel
Connections on the eyepiece side:2", 1.25" and M63x1 female thread
Tube length (dew cap retracted):445 mm
Tube diameter:105 mm
Dew cap diameter:121 mm

Shipping costs

15,90 €
European delivery 2-5 days.
PostNord Parcel locker
5,90 €
PostNord Home deliver
19,00 €
Environmentally friendly delivery to your door at the agreed time. Trackable deliveries in real time even in the evenings in the biggest cities. Change your delivery as required.
UPS Standard
14,90 €
Delivery to Europe in 2 to 5 days.
5,90 €
12,90 €















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