M54 (female) to M48 (male) adapter - ASToptics
Looking for a reliable and precisely manufactured mechanical connection between accessories with M54 and M48 threads? The ASToptics adapter is exactly what you need. This compact reduction adapter allows seamless connection of components with different thread sizes, without compromising the accuracy or stability of your entire optical train. It is an ideal choice for both visual observation and demanding astrophotography.
Precision engineering for your optical train
The ASToptics M54 to M48 adapter is manufactured with an emphasis on precise thread engagement - M54 x 0.75 on the female side and M48 x 0.75 on the male side. The optical length of just 1 mm ensures that inserting this adapter into your optical system will have minimal impact on the achieved focal length. This is especially important in astrophotography, where every millimeter matters when setting the correct backfocus distance. The overall dimensions of 60 x 60 x 10 mm guarantee a compact fit without unnecessarily adding length to your imaging train.
When will you use this adapter?
From a practical standpoint, you will appreciate this adapter whenever you need to connect accessories with different thread diameters - for example:
- Filter drawers or filter wheels
- Field correctors or flatteners
- Camera sensors with flat registration
- Other optical accessories in your train
The M54 thread is a common standard on the output side of many refractors and Newtonian telescopes, while M48 is widely used with astro cameras and filters. This adapter serves as a natural bridge between these two worlds.
Why choose ASToptics?
ASToptics is a well-respected manufacturer of astronomical accessories, with products designed with the real needs of observers and astrophotographers in mind. Their adapters are characterized by precise machining, tight thread tolerances, and the use of quality materials that withstand cold nights and repeated assembly and disassembly. If you are building or optimizing your optical train, investing in a quality ASToptics adapter pays off - it eliminates play, prevents camera tilt, and contributes to sharp, centered images across the entire field of view.
Technical specifications
| Parameter |
Value |
| Female thread |
M54 x 0.75 |
| Male thread |
M48 x 0.75 |
| Optical length |
1 mm |
| Overall dimensions |
60 x 60 x 10 mm |
| Manufacturer |
ASToptics |
| Suitable for |
Visual observation, astrophotography |
