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Starizona M42 Extension - 10mm
The Starizona M42 Extension adds exactly 10mm of length to any imaging train using standard M42 threads. This single-piece tube features both male and female M42 threads, allowing it to be inserted between M42-threaded accessories to help achieve the precise back focus required by your flattener, reducer, or coma corrector.
Achieving 10mm of M42 Back Focus
Back focus is the critical distance from the last optical element in your train to the camera's sensor. The Starizona M42 Extension provides a fixed 10mm of that required distance. For many imaging setups, achieving the specified back focus is a matter of combining different extension tube lengths, and this 10mm piece serves as a fundamental building block for fine-tuning that spacing.
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What is the primary use for the Starizona M42 Extension - 10mm?
Its sole purpose is to add a precise 10mm of length to an M42-threaded imaging train. This is done to achieve the exact back focus distance required by an optical corrector like a field flattener or focal reducer.
My flattener requires 55mm of back focus, but my camera and OAG only provide 45mm. Will the Starizona 10mm extension solve this?
Yes. In that scenario, this 10mm extension is designed to fill that exact 10mm gap in your M42-threaded optical path, bringing your total spacing to the required 55mm.
Can I use the Starizona 10mm extension to image the Orion Nebula (M42) with my specific camera and telescope?
This extension can be a critical component for imaging any object, including the Orion Nebula (M42), if your optical train requires exactly 10mm of additional M42 spacing. Correct spacing is essential for sharp stars across the field, regardless of the target.
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| Thread |
M42 (male/female) |
| Length |
10mm |
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Starizona M42 Extension - 10mm
× 1
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Starizona Warranty
