page contents

TEC 140 F7 APO CaF2 Fluorite Oiled Triplet APO Refractor inc Rings, Handle, Dovetail

TEC 140 F7 APO CaF2 Fluorite Oiled Triplet APO Refractor inc Rings, Handle, Dovetail

can be shipped within 90-180 days

Price includes VAT, plus delivery

NOTE: Orders for TEC 140's are now subject to a lead time of up to 6 months. All orders placed require a 30% deposit with order.

The TEC 140 is a classic apochromtic telescope. It offers excellent light gathering capacity with compact size while offering outstanding optical quality. Its F7 focal ratio makes it well suited for imaging applications. When used with a front mounted D-ERF it is also well suited to solar observing and imaging. The classic TEC 140 is now offered with a new Fluorite objective compared to the original model which uses FPL-53 Super ED Glass.


The TEC 140 is an Aplanatic Oiled Triplet refractor using CaF2 Fluorite Crystal for the middle element. The colour correction is optimised for visual use with focus shift of less than 0..2% from 436nm to 1000nm. Calculated strehl for the e-line (546nm) is 0.99. Testing of lenses has shown that the average actual strehl is very close to this with RMS wavefront error of less than 1/50 wave.

The oiled design has only two air to glass surfaces which offers the possibility of a higher contrast image due to reduced light scatter and glare compared to some air spaced designs.

The telescope is supplied as standard from us with tube rings and case and the excellent Starlight Instruments 3.5" Feathertouch focuser which can cope with almost any camera load. The focuser may also be motorised for more demanding imaging applications.

This version includes tube rings, 9" Losmandy plate and carrying handle

Aperture 140mm
Focal Length 980mm
Focuser Starlight 3.5" Feathertouch
Focuser Max Load 5.5kg
Minimum Length 860mm
Tube Diameter 150mm
Dewsheild Diameter 178mm
Weight, including Rings 9.6kg
Backfocus 170mm
Included Items Tube Rings / Handle / Dovetail



Browse this category: Apochromatic Refractors