QHY M42 Adapter for Nikon F lens

Key Features: BFL Customization: Before using, verify if your equipment has specific back focus length (BFL) requirements. If not, a standard T-ring connection to your telescope is sufficient. Added Flexibility with Spacers: For precise BFL adjustments, we offer additional 0.5mm and 1mm spacers, available for purchase since 7/23, catering to more specific needs. Comprehensive Adapter Options: The kit includes M42 and M54 adapters, providing a wide range of spacers: 0.5, 1, 2, 3, 7, and 14mm. This allows for customizable back focus adjustments from 0.5mm to 27.5mm. Recommended M54 Kit for Most Uses: The M54 All-in-One Kit is generally the best choice, suitable for a variety of applications and compatible with most QHY cameras. Special Consideration for QHY183M and QHYCFW3S Users: If you're using a QHY183M or QHYCFW3S, the M42 All-in-One Kit is specifically designed for these models. Versatile and User-Friendly: Whether you're dealing with unique back focus requirements or st