ZWO 16.5mm Male M42 to Female M48 Adapter
Best adapter for astrophotographers needing precise back focus and equipment compatibility.
This adapter bridges camera and telescope equipment for astrophotography. It offers a 16mm back focus, crucial for achieving precise focus. The adapter features a male M42 connection on the camera side and a female M48 connection for the telescope. Constructed from durable aluminum, it ensures a reliable and secure connection for your imaging setup, enhancing your astrophotography experience.
Owner Satisfaction
4.8
/ 5
Category Rank
11
/ 2593
#11 in Telescope Accessories
Adapter Side B
48
/ M female
Who it's for
- Astrophotographers needing precise 55mm back focus alignment
- Imagers mixing M42 and M48 threaded equipment
- Long-exposure photographers requiring rigid, wobble-free connections
Who should skip it
- Users needing micro-adjustments for perfect focus spacing
- Owners of large-format sensors prone to vignetting
- General hobbyists outside the astrophotography community
Performance breakdown
Build integrity
Machined aluminum construction ensures a rigid, flex-free connection for heavy imaging trains.
Back focus precision
Provides the exact 16mm spacing required for optimal sensor-to-flattener alignment.
Thread compatibility
Standardized M42 and M48 threading ensures seamless integration with most astrophotography gear.
Ease of installation
Simple threaded design allows for quick setup changes in the field.
Vibration resistance
Secure locking threads minimize micro-vibrations during long-exposure deep sky imaging.
System versatility
Essential for bridging common camera mounts to larger telescope aperture accessories.
Key Specs
Adapter Side B
M48 female
Back Focus
16mm
Camera/Eyepiece Side Connection
Male M42x0.75
Scope Side Connection
Female M48x0.75
Material
Aluminum
Connection Interface
M42 Thread
Accessory Type
Adapter
Know before you buy
This adapter is designed to bridge the gap between M42-threaded cameras and M48-threaded telescope accessories, allowing you to integrate different components into your imaging train.
Yes, this adapter provides a fixed 16.5mm of back focus. This is essential for reaching the correct sensor distance required by many dedicated astronomy cameras and field flatteners.
No, this adapter is specifically configured with a male M42 connection on the camera side and a female M48 connection on the telescope side. It is not reversible.
Yes, the female M48 thread on the telescope side is compatible with standard 2-inch mounted filters, allowing you to thread them directly into the adapter.
The adapter is constructed from high-quality aluminum. It is designed to be lightweight yet rigid enough to securely hold your camera equipment without flexing under load.
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