18.3mm Backfocus Spacer - part of 160FF and QUADTCC-TEC140 (A2680)
Brand : Astro-Physics
Part # changed to EXT327-18.3
May 31, 2021 - Part # changed to EXT327-18.3 to more clearly describe its function.
This 18.3mm adapter is supplied with the QUADTCC-TEC140. You may purchase it separately to adapt the QUADTCC that you may have purchased for another telescope. The image for this product is the 22.1mm version (A5020).
|Backfocus Spacer Length||Part Number|
Important Note: When purchasing the QuadTCC the proper length Backfocus Spacer is included for the scope specified. However, when ordering the QUADTCC for a TEC scope you will also need to order a Drawtube Endcap (S35RFAA) for the focuser. This only applies to the TEC focusers. This part is integral to the Astro-Physics 3.5" focusers and is not needed as a separate purchase. The S35RFAA screws onto the drawtube's 4.100" x 24 thread (same as Starlight Instrument's 3.5" focuser endcap thread).
|Scope||Part Code||Backfocus Spacer||Spacing with Bf. S.||Spacing without Bf. S.|
|AP 130 GTX||QUADTCC-AP130||22.1 mm||80.8 mm||102.9 mm|
|TEC 140||QUADTCC-TEC140||18.3 mm||80.8 mm||99.1 mm|
|TEC 160||QUADTCC-TEC160||17.0 mm||80.8 mm||97.8 mm|
|TEC 180||QUADTCC-TEC180||16.0 mm||80.8 mm||96.8 mm|