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Antlia Extension Tube for Solar Discover CaK Assembly - 50mm
The Antlia 50mm Extension Tube gives more back focus, if needed, when the Antlia Solar Discover 5Å CaK assembly is used with a Barlow lens. This helps the solar imaging system reach focus during shooting.
Achieve Solar Focus: 50mm Extension for CaK Imaging
Adding a Barlow lens to the 5Å CaK assembly moves the point of focus further out. If the imaging train then needs more back focus to reach focus, the Antlia 50mm Extension Tube provides it.
50mm vs. 70mm Extension: Choosing the Right Back Focus
Antlia offers this extension tube in two lengths, 50mm and 70mm. The right one depends on how much extra back focus your setup needs to reach focus with the Barlow lens.
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50mm Extension (This Model): The shorter of the two lengths.
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70mm Extension: The longer version, for setups that need more back focus than the 50mm tube gives.
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When do I need the Antlia 50mm Extension Tube for my CaK assembly?
You need the Antlia 50mm Extension Tube when you add a Barlow lens to your imaging train with the Antlia Solar Discover 5Å CaK assembly and find you cannot reach focus. This shows when the focuser is racked all the way out but the image remains soft. Antlia offers the tube to achieve more back focus if needed.
How do I install the Antlia 50mm Extension Tube?
The tube goes in the imaging train to add back focus when the 5Å CaK assembly is used with a Barlow lens. Antlia does not state the thread or the exact position in the train; contact us if you need help planning your setup.
Should I get the 50mm or 70mm Antlia Extension Tube for my Solar Discover CaK Assembly?
Antlia offers both lengths to achieve more back focus if needed. Choose the 50mm tube if that is enough to reach focus with your Barlow lens, and the 70mm version if your setup needs more.
Will the Antlia 50mm Extension Tube work with other telescopes?
Antlia offers this extension tube as an accessory for the Antlia Solar Discover 5Å CaK assembly. It does not state the thread or compatibility with other telescopes.
What's the main sign I need an extension tube for imaging the Sun with my Antlia CaK Assembly?
The primary sign is running out of focuser travel. If you have a Barlow lens in the optical path and have turned the focus knob as far "out" as it will go, but the image of the solar surface never becomes sharp, an extension tube like this 50mm model can give the extra back focus needed.
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| Length |
50mm |
| Purpose |
Adds back focus when using the Antlia Solar Discover 5Å CaK assembly with a Barlow lens |
| Compatibility |
Antlia Solar Discover 5Å CaK assembly |
| Available Sizes |
50mm |
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Antlia Extension Tube (50mm)
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