Crayford Robust Focuser TS 2" UNC Gen 2 with load capacity 5Kg

Crayford Robust Focuser TS 2" UNC Gen 2 with load capacity 5Kg

Focuser RAP TS UNC 2" for newtonian telescopes

The focuser TS UNCN2-G2 is optimized for newtonian telescopes when it is necessary to focus heavy accessories with precision. Especially for astrophotography, this focuser is optimized. Therefore, we recommend this focuser also for the ONTC and UNC newtonian telescopes of our own manufacture.

The advantages and product features of the UNCN2-G2 focuser:

♦ Maximum rigidity: the drawtube is supported by 8 ball bearings and the drawtube adjustment is done by gears
♦ Adjustment range of 22 mm through gear drive
♦ The focuser supports up to 5 kg with full precision
♦ Intermediate thread M54x0.75 for screw adaptations or if the drawtube needs to be extended, suitable extension tubes are available.
♦ One of the shortest focusers in its class with an overall height of only 58 mm up to 2" and an overall height of only 50 mm up to the M54x0.75 thread when the tube is retracted
♦ Easy attachment to existing tubes, the base is included in delivery
♦ The focuser is not clamped by pressure on the draw tube, which can cause it to tilt. It is clamped by the adjustment shaft. This maintains 100% focus position without risk of tilting, which is important for astrophotography.
♦ The dual 1:11 speed provides precise manual adjustment, especially for fast telescopes, this is a must.
♦ Motorized controls for the focuser are available.

Screw connection of correctors to the M54x0.75 thread of the focuser:
If the corrector is screwed to the focuser, tilting is avoided. Therefore, many astrophotographers attach great importance to this. We have developed a short adapter to M48x0.75 especially for this focuser, the #M54a-M48i. The adapter is only 3 mm long. It is linked in the accessories section.

♦ Baader MPCC and TSGPU coma correctors from TS-Optics have an additional M48 thread for screw adaptations. You can use these threads and have the full 55 mm working distance available.

♦ However, you can also use other correctors with the short adapter # M54a-M48i, but the prerequisite is that the M48 thread on the camera side is at least 5 mm long. Then there is still enough thread left for the camera connection. However, please note that the working distance of the corrector is reduced by 3 mm.

GENERAL FEATURES:

♦ 8x oversized ball bearings for clean drawtube bearing.

♦ Pinion and rack drive tube adjustment - even at maximum load, the adjustment is sensitive

♦ M54x0.75 intermediate thread between 2" receptacle adapter for threaded connections: the draw tube can be extended with optional M54 extension tubes

♦ No tilting possible when clamping the focuser: clamping is directly on the adjustment axis, so the focusing position is maintained at 100%.

♦ Includes flexible base for telescope tubes from 230 mm upwards - suitable for Newtonian telescopes with an aperture of 8" and larger

♦ Short height including base - only 58 mm to 2" receptacle - only 50 mm to female thread M54x0.75 of the drawtube

♦ Eyepiece side connections - M54x0.75, 2" and 1.25" female threads with self-centering adapter

TECHNICAL SPECIFICATIONS:

• Construction: RAP focuser - ball bearing mounted
• Load capacity: up to 5 kg
• Bearing: 8 ball bearings
• Adjustment: helical toothed rack
• Minimum height: 58 mm to the 2" receptacle
• Eyepiece side connections: 1.25", 2" and M54x0.75 female thread on the drawtube
• Focuser adjustment range: 22 mm
• Reduction ratio: 1/11
• Locking: locking screw on the adjusting shaft
• Focuser attachment to the base: 80 mm diameter dovetailed self-centering ring
• Distance of the holes in the base: 55 mm along the length and 92 mm along the tube and additionally two oblong holes along the length of the tube
• Weight: 900 grams

Crayford Robust Focuser TS 2" UNC Gen 2 with load capacity 5Kg