Omegon Crayford focuser for Schmidt-Cassegrain telescopes -for better astrophotography
Achieving precise focus in astrophotography is half the battle. This is not an easy task however, especially with Schmidt-Cassegrain telescopes. The reason here is that the primary mirror of SC telescopes wobbles back and forth slightly during the focusing procedure. This 'mirror shift' is one hassle that you can easily avoid by using the new Omegon Crayford focuser. This SC focuser lets you focus completely accurately, helping you rapidly and easily locate the precise point of focus.
Simply screw on and get started
The Omegon SC Crayford focuser is simplicity itself to use. Its telescope-side thread fits directly onto the standard SC thread on your Schmidt-Cassegrain telescope. In 2 minutes everything is screwed on and you can get started. Coarse focusing is done using the main mirror focusing knob, but the final precise focusing is done using the new focuser.
An improved Crayford focuser
'Bearing Type' is the name of the new improved Crayford design. A 'normal' Crayford focuser already has the advantage of play-free focusing. The secret of this Omegon focuser is its roller ball bearings: 8 over-size rollers keep the focuser's tube firmly in place. The tube slides silkily smoothly into any desired position. The addition of a rack-and-pinion makes the hold the focuser tube securely in position - the tube does not simply slide through as is the case with 'normal' Crayford focusers.
Extremely sensitive focusing via a 1:10 reduction gear
The rubber-reinforced and lightly grooved focus wheels let you focus precisely. The multiple ball bearings used to hold the inner tube make this precision focusing possible. Focusing becomes even more precise with the 1:10 reduction gearing. This even lets you focus precisely at high magnifications, for example when using the live image on your laptop screen.
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