QHYCFW3, the new QHY Color Filter Wheel, an improved version of the 2nd. version, and with many options available.
Friction Drive – No Backlash – Precision Positioning
Regarding the evolution of the motor drive, our 2nd generation filter wheels used a gear drive while this 3rd generation filter wheel uses a friction drive that with zero backlashes. It also positions and stops with high precision.
Four Models
Small, Medium, Large, Extra-Large. QHYCFW3XL (extra-large size), QHYCFW3L (large size), QHYCFW3M (medium size), and QHYCFW3S (small size). Both the QHYCFW3M and QHYCFW3S are also available in a standard version (-SR) and a thin version (-US). For details, please see below.
- Small:
- UltraSlim
- 7 Position 1.25inch
- 7 positions de 31 mm.
- Standard:
- 7 Position 1.25inch
- 7 positions de 31 mm.
- UltraSlim
- Medium:
- UltraSlim:
- 7 Position 36mm.
- Standard:
- 5 position 2inch
- 5 position 50 mm. (round)
- UltraSlim:
- Large:
- 7 position 2inch
- 7 position 50 mm. (round)
- Extra-large:
- 9 position 2inch
- 9 position 50 mm. (round)
- 7 position 50 mm. x 50 mm. (square)
Hybrid Stepper Motor – Super Thin – Enclosed Motor
QHYCCD selected a high-quality ultra-thin hybrid stepper motor for the 3rd generation filter wheel design. Compared to the PM stepper motor used in many filter wheels, the hybrid stepper motor has higher precision, smaller step angle, and is more expensive.
The motor is enclosed to prevent dust from entering the motor, thus improving reliability and motor life. The direction of filter rotation can be reversed: The filter carousel can be rotated clockwise or counterclockwise to complete the rotation quickly which is very convenient.
Two Control Modes
* 4-pin QHYCFW Port
* USB Port
There is a switch button on the QHYCFW3. The serial port switch can accommodate fast switching between serial communication mode and USB communication mode.
Improvement for Compatibility
Besides, the new version of the QHYCFW3 Color Filter Wheel has been improved for compatibility. The original product can only be used with 1.25-inch mounted filters, while the updated version can also be fitted with 36mm unmounted filters through the new-added screw holes.
| Model | Thickness + backfocus consumed by camera-side adapter * | Carrousel Filter Supported | Thread (Both sides) 6-hole pattern radius/diameter | Camera side adapter: inside diameter / total thickness | Available filter height limitation
| Weight |
| QHYCFW3S-US (UltraSlim) | 15,5 mm.+4mm. | 7 Positions – 1,25″ 7 positions – 31 mm. | M-42 – R 27 / ø 54 | 2″ – 11mm. | 5.5 mm. | 419 gr. |
| QHYCFW3S-SR (Standard) | 20 mm.+4mm. | 7 Positions – 1,25″ 7 positions – 31 mm. | M-42 – R 27 / ø 54 | 2″ – 11mm. | 10 mm. | 446 gr. |
| QHYCFW3M-US (UltraSlim) | 17 mm.+2mm. | 7 positions – 36 mm. | M-54 – R 31 / ø 62 | 2″ – 9mm. | 5.5mm | 691 gr. |
| QHYCFW3M-SR (Standard) | 20,5 mm.+2mm. | 5 positions – 2″ 5 positions – 50 mm. (round) | M-54 – R 31 / ø 62 | 2″ – 9mm. | 10 mm. | 728 gr. |
| QHYCFW3L | 21,5 mm. | 7 Positions – 2″ 7 Positions – 50mm. (round) | M-54 – R 31 / ø 62 | 2″ – 9mm. | 10 mm. | 911 gr. |
| QHYCFW3XL | 21,5 mm. | 9 Positions – 2″ 9 Positions – 50mm. (round) 7 Positions – 50*50 mm. (square) | M-62×0,75 R 34 / ø 68 | 77’3mm. – 12mm. | 10 mm. | 1500 gr. |
*Back Focus Consumed
For the convenience of calculation, all the data displayed are the back focal length taken up by using the adapter, which is not necessarily equal to the thickness of the component itself. All the adapter data provided by QHYCCD are based on the focal length increment (back focus consumed). For More information please see: the manufacturer page Adapter Kits 2.0 (ComboA1~E1)
The Calculation of the Filter Wheel’s back focus consumed includes two parts: The thickness of the filter wheel body (like the 15.5mm of CFW3S-US), and the back focus consumed by the camera adapter (like 4mm for the CFW3S-US).
Documentation:
