Starizona M42 to M48 Step Ring
- Adapts M42 Female Threads to M48 Male Threads
- Adds 0mm to the Optical Path
- Ultra-Thin Step-Up Ring Design
- Connects M42 Male Accessories to M48 Female Ports
Check which filter and adapter sizes clear the sensor with the Starizona M42 to M48 Step Ring, and how much light the corners lose.
Check vignettingThe Starizona M42 to M48 Step Ring adapts internal M42 female threads to external M48 male threads, adding precisely 0mm of optical path length to your imaging train.
This adapter provides a direct conversion from the smaller M42 thread standard to the larger M48 format common on 2-inch accessories like filter wheels and camera adapters. Its key feature is a zero-profile design that adds 0mm of length to your optical train.
Maintaining exact back focus is critical when using focal reducers and field flatteners. By consuming no optical path length, the Starizona M42 to M48 Step Ring allows you to connect M42-threaded components to M48-threaded hardware without altering the carefully calculated spacing your corrector requires. This makes it an essential component for building a rigid, threaded imaging train with mixed components.
The Starizona M42 to M48 Step Ring is designed to connect two components with different thread sizes. An accessory with M42 male threads (such as a T-ring or camera adapter) threads into the ring, and the ring then threads into a device with M48 female threads (such as a 2-inch filter holder or field flattener).
No. The adapter is specifically engineered to add 0mm of optical path length. This means it does not consume any of your available back focus, which is crucial for ensuring that field flatteners and focal reducers work at their designed distance.
The adapter features M42 female threads on the inside and M48 male threads on the outside, allowing you to "step up" from the smaller M42 format to the larger M48 format.
| Inner Thread | M42 female |
| Outer Thread | M48 male |
| Added Optical Path | 0mm |