What is the exact function of the Player One 20mm M48 adapter?

The Player One M48F-M48M Adapter is a rigid extender that adds exactly 20mm of length to your imaging train. Its primary purpose is to help you achieve the precise back focus distance specified by your field flattener or reducer, which is critical for achieving sharp stars to the edge of your images.

My flattener requires 55mm of back focus and my camera has a 17.5mm flange distance. How does the Player One 20mm adapter help?

In this common scenario, you need to add 37.5mm of spacing (55mm - 17.5mm). The Player One 20mm M48 adapter can be a key part of this solution. You would combine this 20mm adapter with other spacers (e.g., a 16.5mm and a 1mm) to precisely hit your target distance.

What are the thread types on the Player One 20mm M48 adapter?

This adapter uses the standard M48x0.75 thread on both sides. It has female (internal) threads on the telescope/corrector side and male (external) threads on the camera side, allowing it to be inserted directly into any M48-threaded imaging train.

Will the Player One 20mm M48 adapter cause vignetting on a full-frame camera?

No. The M48 thread standard is designed to provide a clear aperture large enough to illuminate full-frame sensors (36mm x 24mm) without introducing additional vignetting. Any vignetting in your final image would be from other components in your optical path, not this 20mm adapter.

Can I thread 2-inch filters into the Player One M48 adapter?

Yes. The M48x0.75 female thread is the same standard used for 2-inch astronomy filters. You can thread a 2-inch filter directly into the female side of the adapter, which can be useful for placing a filter at a specific distance from the sensor.

Is using the Player One 20mm M48 adapter better than a variable spacer?

For a fixed distance like 20mm, a solid, non-adjustable adapter is generally superior. Fixed adapters provide a more rigid and stable connection, which is less prone to tilt than variable or helical spacers. This rigidity is crucial for maintaining a flat field with heavy cameras.

Player One M48F-M48M Adapter - 20mm

by Player One

SKU POA-M48F-M48M-20

CA$34.00 - CA$34.00

CA$34.00

CA$34.00 - CA$34.00

CA$34.00

Price Match Policy!

Adds exactly 20mm of optical length
M48x0.75 female (input) and male (output) threads
Maintains a rigid connection in the imaging train
Standard 2-inch filter thread compatibility

2 in stock

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Description
FAQ
Specifications
In the Box
Warranty

Player One M48F-M48M Adapter - 20mm

The Player One M48F-M48M Adapter provides a fixed 20mm extension for any optical train using the M48x0.75 thread standard. This essential component allows you to achieve the precise back focus distance required by field flatteners, reducers, and coma correctors, ensuring sharp stars across the entire image field.

Achieve Precise 20mm Back Focus for Flat Fields

Modern correctors demand exact spacing to deliver their designed optical correction. This adapter adds a non-negotiable 20mm to your back focus, filling a common gap between a camera's native flange distance and the typical 55mm requirement of many flatteners and reducers. Using a fixed, threaded extender like this is more rigid and reliable than using adjustable spacers, preventing tilt and maintaining optical alignment.

Universal M48x0.75 Threads for 2-Inch Accessories

Featuring standard M48x0.75 female threads on one side and male threads on the other, this adapter is a universal fit for most imaging setups. The M48 thread, often called the 2-inch filter thread, ensures compatibility with a wide range of accessories, including filter wheels, off-axis guiders, and camera-specific adapters, without causing vignetting on sensors up to full-frame size.
What is the exact function of the Player One 20mm M48 adapter?

The Player One M48F-M48M Adapter is a rigid extender that adds exactly 20mm of length to your imaging train. Its primary purpose is to help you achieve the precise back focus distance specified by your field flattener or reducer, which is critical for achieving sharp stars to the edge of your images.

My flattener requires 55mm of back focus and my camera has a 17.5mm flange distance. How does the Player One 20mm adapter help?

In this common scenario, you need to add 37.5mm of spacing (55mm - 17.5mm). The Player One 20mm M48 adapter can be a key part of this solution. You would combine this 20mm adapter with other spacers (e.g., a 16.5mm and a 1mm) to precisely hit your target distance.

What are the thread types on the Player One 20mm M48 adapter?

This adapter uses the standard M48x0.75 thread on both sides. It has female (internal) threads on the telescope/corrector side and male (external) threads on the camera side, allowing it to be inserted directly into any M48-threaded imaging train.

Will the Player One 20mm M48 adapter cause vignetting on a full-frame camera?

No. The M48 thread standard is designed to provide a clear aperture large enough to illuminate full-frame sensors (36mm x 24mm) without introducing additional vignetting. Any vignetting in your final image would be from other components in your optical path, not this 20mm adapter.

Can I thread 2-inch filters into the Player One M48 adapter?

Yes. The M48x0.75 female thread is the same standard used for 2-inch astronomy filters. You can thread a 2-inch filter directly into the female side of the adapter, which can be useful for placing a filter at a specific distance from the sensor.

Is using the Player One 20mm M48 adapter better than a variable spacer?

For a fixed distance like 20mm, a solid, non-adjustable adapter is generally superior. Fixed adapters provide a more rigid and stable connection, which is less prone to tilt than variable or helical spacers. This rigidity is crucial for maintaining a flat field with heavy cameras.
Optical Length 20mm

Input Thread M48x0.75 Female

Output Thread M48x0.75 Male
Player One 2-Year Warranty

Player One M48F-M48M Adapter - 20mm