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Antares Low Profile 2" Helical Focuser - height only 20 mm

Name: Antares Low Profile 2" Helical Focuser - height only 20 mm
Brand: Antares - Sky Instruments
SKU: ANFOCH2
Price: 144.9 EUR

The shortest 2" helical focuser for Newtonians that we know - ideal for telescope making

Easy adjustment by turning the 2" receptacle

21 mm travel

Flat base with four mounting screws for tubes with a flat support surface

Four spacers for curved tubes with at least 230 mm tube diameter

Reduction adapter from 2" to 1.25" included - the adapter does not add extra height

Manufacturer: Antares - Sky Instruments

Product number: ANFOCH2

EUR 144,90

incl. 19 % VAT (DE)

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excl. 6.95 € shipping costs (DE)

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Antares Low Profile 2" Helical Focuser - height only 20 mm

The shortest 2" helical focuser for Newtonians that we know - ideal for telescope making

Easy adjustment by turning the 2" receptacle

21 mm travel

Flat base with four mounting screws for tubes with a flat support surface

Four spacers for curved tubes with at least 230 mm tube diameter

Reduction adapter from 2" to 1.25" included - the adapter does not add extra height

Details..
Technical data..
In the box..

Antares Low-Profile Helical Focuser for Newtonian telescopes

The short 2" focuser is ideally suited for self-construction of visually optimized telescopes. It is suitable for 1.25" and 2" accessories. Adjustment is made by turning the eyepiece. For the do-it-yourselfer who mainly wants to observe visually, the low profile Newtonian focuser has a few advantages:

Extremely short construction - height only 20 mm for flat support surfaces or 26 mm for curved tubes

Through the short length, the secondary mirror can be kept small, so no valuable aperture and contrast get lost

Generous 21 mm travel

The focuser is lightweight with only 280 grams

Easy adjustment - done by simple rotating of the eyepiece. Due to the helical principle, focusing is more sensitive than with most rack and pinion or Crayford focusers.

The adaption to the telescope is very easy:

A special adapter or a base blate are not necessary. You only need an opening for the draw tube (diameter 67 mm) and the bores for the connection to the tube (distance 63.2 mm square). Tubes from 230 mm diameter can be used and an adaption to flat support surfaces is possible without any difficulty.

Minimum height:	20 mm (flat support surface) or 26 mm (curved support surface)
Travel:	21 mm
Eyepiece side connection:	2" and 1.25"
Telescope side connection:	four bores, distance 63.2 x 63.2 mm (diagonal 90.5 mm)
Diameter for the opening of the tube:	67 mm
Material:	Aluminium