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2.7" Thread-On Extensions for Astro-Physics Focusers and Accessories (A3502-A, A3503-A, A3504-A, A3505, A3506, A1008-A)

Brand :

Part numbers changed. Refer to description.

SKU:
A350-
A3505
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 May 31, 2021 - Part # changed to more clearly describe its function. Refer to the chart below. 

 

EXT27-15.2 (formerly A3505)
2.7" Thread-on Extension

This extension has a net spacing distance of 0.60" (15.2 mm).

 

EXT27-19.1 (formerly A3503-A)
2.7" Thread-on Extension

This extension has a net spacing distance of 0.75" (19.1 mm).

 

EXT27-22.9 (formerly A3506)
2.7" Thread-on Extension

This extension has a net spacing distance of 0.90" (22.9 mm).

 

EXT27-31.8 (formerly A3504-A)
2.7" Thread-on Extension

This extension has a net spacing distance of 1.25" (31.8 mm).

 

EXT27-44.5 (formerly A3502-A)
2.7" Thread-on Extension

This extension has a net spacing distance of 1.75" (44.5 mm).

 

EXT27-64.8  (formerly A1008-A)
2.7" Thread-on Extension

This extension is provided with Astro-Physics refractors that have the 2.7" focuser. It is for use when observing straight-through without a diagonal or when imaging without a prime focus field flattener. [Note that this extension may be too long except for special applications.]

This extension has a net spacing distance of 2.55" (64.8 mm).

 

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