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M42-M48 Photo Adapter for FMA180
This M42-M48 photo adapter is the essential component for connecting larger format imaging accessories to your Askar FMA180 astrograph. It directly converts the FMA180's standard M42x0.75 T-thread output to the wider M48x0.75 thread common on 2-inch filter wheels, filter drawers, and full-frame camera T-rings.
M42 to M48 Conversion for the Askar FMA180
In photographic mode the Askar FMA180's rear thread is M42x0.75. This adapter provides an M48 connection point, so you can add your existing M48 accessories to the FMA180's imaging train.
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What is the primary purpose of the M42-M48 adapter for the FMA180?
Its main function is to convert the Askar FMA180's standard M42 T-thread to a larger M48 thread. This allows you to attach accessories that use the M48 standard, such as 2-inch filter drawers or T-rings for full-frame DSLR and mirrorless cameras.
Will this FMA180 adapter work with other telescopes?
It is intended only for the FMA180. The FMA180 Pro already comes with an M48 adapter at the rear (M48x0.75), so it does not need this adapter.
What kind of accessories can I attach to my FMA180 with this adapter?
This adapter opens up compatibility with a wide range of M48-threaded accessories. Common examples include:
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2-inch Filter Wheels and Drawers: For convenient multi-filter imaging sessions.
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Full-Frame Camera Adapters: M48 T-rings are preferred for larger sensors to reduce vignetting.
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Off-Axis Guiders (OAGs): Many larger OAGs use M48 threads for a more rigid connection.
Does this M42-M48 adapter change the back focus of the FMA180?
Askar does not publish this adapter's optical length, so include it when you work out your spacing. In photographic mode the FMA180's back focus is a standard 55mm, or 83mm after removing the extension tube.
How do I install the M42-M48 adapter on the Askar FMA180?
Installation is straightforward. You typically unthread the existing M42 adapter or extension from the rear of the FMA180's focuser or optical train. Then, you carefully thread the M42-M48 adapter in its place, ensuring it is snug but not overtightened.
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| Kind |
thread converter |
| Telescope-side connection |
thread: M42x0.75 (T2); gender: female |
| Camera-side connection |
thread: M48x0.75; gender: male |
| Warranty |
1 year |
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Askar M42-M48 Photo Adapter for FMA180
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- Askar 1-Year Warranty
