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TEC 140 F7 APO CaF2 Fluorite APO Refractor inc Rings - 3.5" Focuser

In stock
can be shipped within 300-600 days

Price includes VAT, plus delivery

We have TEC140's on back order. Please contact us for lead times. 30% Deposit required

The TEC140FL F/7 is a classic apochromtic telescope. It offers excellent light gathering capacity with compact size while offering outstanding optical quality. Its F7 focal ratio also 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. As such the TEC140FL is the ideal scope for all applications. A true classic. 

The TEC140FL is an Aplanatic Oiled Triplet refractor using CaF2 Fluorite Crystal for the middle element. The colour correction is optimised for visual and imaging applications 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 with tube rings as standard from us and includes 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.

As an option at the time of order, you may add a TEC supplied 9" Losmandy plate and matching carrying handle at additional cost.

TEC Imaging accessories for the 140 include the FRC 0.9x Focal Reducer.


Aperture 140mm
Focal Length 980mm
Focuser Starlight FT3545 3.5"
Max Focuser Load 5.5kg
Minimum Length 860mm
Tube Diameter 150mm
Dewsheild Diamter 178mm
Weight (including Rings) 9.6kg
Back focus 170mm
Included Items Tube Rings


TEC140FL is currently subject to a lead time of typically 12-18 month for all new orders if we do not have an order with TEC already. A 30% deposit is required with order. Please contact us for details.

* A small delivery charge may be required depending on delivery location


Browse these categories as well: Apochromatic Refractors, TEC