Filter wheel CFW3M-SR 7 positions 36mm unmounted

Introducing QHYCCD's CFW3 motorized filter wheels

QHYCCD's CFW3 series of motorized filter wheels is state-of-the-art equipment designed to meet the requirements of astrophotographers and astronomical researchers. These devices enable fast, precise switching between different optical filters, which is essential for multispectral imaging, narrow-band observation, or scientific projects requiring wide spectral coverage.

The CFW3 series is available in several models: CFW3S-SR/US, CFW3M-SR/US, CFW3L, and CFW3XL, each with specific features to suit different needs. An important distinction between the SR and US versions lies in the physical depth of the filter wheel, which has a direct impact on integration into complex optical setups.

Technical features common to the CFW3 series

1. Mechanical precision and motorization

• Filter positioning : High-precision stepper motor guarantees exact positioning with exceptional repeatability.
• Minimized vibration: The drive mechanism is designed to minimize vibration and ensure quiet operation.
• Filter change time : Average filter change time is less than 2 seconds, optimizing workflow.

2. Robust, compact design

• Material : Aircraft-grade anodized aluminum, resistant to environmental conditions (humidity, thermal variations).
• Backfocus reduction : The compact design reduces the overall backfocus of the optical system.
• SR and US versions : SR versions are thinner, ideal for low backfocus setups, while US versions are slightly thicker, offering more flexibility for accessories.

3. Hardware and software compatibility

• Compatible software : ASCOM, NINA, Maxim DL, SGP (Sequence Generator Pro).
• Connectivity : USB or serial connection with some QHYCCD cameras.
• Upgradeable firmware : Ensures future compatibility with software updates.

4. Filter capacity

• Filter formats : 1.25", 31 mm unmounted, 36 mm unmounted, 2", 50 mm unmounted depending on model.
• Interchangeable plates : Enables rapid customization according to project needs.

The different versions of the CFW3 series

1. Model CFW3S-SR/US

• Capacity : Up to 7 filters in 1.25" or 31 mm format, unmounted.
• Recommended use: Ideal for compact CMOS or CCD sensors such as the QHY183 or QHY294.
• SR/US : SR: Thinner version for low backfocus, US: Deeper version, offering greater compatibility with certain accessories.

2. Model CFW3M-SR/US

• Capacity : Up to 7 unmounted 36mm filters.
• Recommended use: Suitable for intermediate sensors such as QHY268M or QHY600M.
• SR/US : SR: Thinner version for low backfocus, US: Deeper version.

3. Model CFW3L

• Capacity : Up to 7 filters in 2" format or up to 9 filters in 50 mm format unmounted.
• Recommended use: Designed for full-format sensors such as the QHY16200A or QHY600 Pro.
• Distinction: No SR/US distinction here.

4. Model CFW3XL

• Capacity : Up to 10 unmounted 50 mm filters.
• Recommended use: For professional astrophotographers using very large-format sensors.

Major differences between versions

• Capacity in number and size of filters : S/M models are designed for compact/intermediate setups, while L/XL models are aimed at professional configurations with full-format or very large-format sensors.
• Physical depth : SR: Thin version, ideal for minimizing backfocus, US: Slightly deeper version offering greater flexibility.

Practical applications of CFW3 filter wheels

• Narrow-band imaging (Ha, OIII, SII), where positioning accuracy is crucial.
• Scientific projects requiring the simultaneous use of numerous photometric filters.
• Advanced color astrophotography combining LRGB + narrow bands.

Efficient CFW3 series summary

• Four main models (S/M/L/XL) to suit different needs in terms of size and number of filters.
• Precise stepper motor with fast changeover (<2 seconds).
• Extended compatibility with ASCOM/NINA software and modern QHYCCD cameras.
• Robust anodized aluminum construction reduces overall backfocus.
• SR (shallow depth) and US (standard depth) versions available on S/M models.

Conclusion

In conclusion, the QHYCCD CFW3 range is an essential choice for maximizing optical flexibility while maintaining impeccable quality in your advanced astronomical imaging projects!