Description
Telescope Adapters and Extensions for the AstroPhysics 2.7 thread
Extensions, Adapters and Retaining Rings
The ubiquitous AP2.7 inch thread has become an astronomy industry standard thanks to the tireless efforts of Roland and his team at Astro-Physics. Optec has produced an extension set and a few new adapters in an effort to extend this industry standard.
Optec's AP 2.7-inch extension tubes feature female threads on one end with male threads on the opposite end with knurled bases to help attach and detach these tubes. The extensions can be combined and stacked. We believe our four and five piece sets will provide all the needed extension for fixed focal length telescopes with 1/4" (6.35mm) increments using a minimum number of pieces.
All extensions and mounts are made from high strength 6061 aluminum alloy and black anodized. Anti-reflection threading and internal baffles on the largest extension tube help minimize internal reflections. All internal surfaces are painted and baked with a non-reflecting ultra-flat black paint.
Specifications
- Spacer Lengths Available: 1/2", 3/4", 1", 1-1/2", and 3"
- Clear Aperture: 2.52" (64mm)
Extension Tube Sets
| Stock #19880 AP2.7 Extension Tube Set, 4-piece set
| |
| Stock #19881 AP2.7 Extension Tube Set, 5-piece set
|
|
Individual Extension Tubes and Retainers
| Stock #19882 AP2.7 Extension - 1/2" Length
|
|
| Stock #19883 AP2.7 Extension - 3/4" Length
|
|
| Stock #19884 AP2.7 Extension - 1" Length
|
|
| Stock #19885 AP2.7 Extension - 1-1/2" Length
|
|
| Stock #19886 AP2.7 Extension - 3" Length
|
|
Stock #19887 AP2.7 Male-to-Male Adapter
|  |
| Stock #19888 AP2.7 Retaining Ring
|
|
Target Extension | Spacers Required | AP2.7 Spacer Stock Numbers | DSI 3.5x24 Stock Numbers |
0.50” | ½” | 19882 | 19891 |
0.75” | ¾” | 19883 | 19892 |
1.00” | 1” | 19884 | 19893 |
1.25” | ½” + ¾” | 19882, 19883 | 19891, 19892 |
1.50” | 1-½” | 19885 | 19894 |
1.75” | 1” + ¾” | 19884, 19883 | 19893, 19892 |
2.00” | 1-½” + ½” | 19885, 19882 | 19894, 19891 |
2.25” | 1-½” + ¾” | 19885, 19883 | 19894, 19892 |
2.50” | 1-½” + 1” | 19885, 19884 | 19894, 19893 |
2.75” | 1-½” + ¾” + ½” | 19885, 19883, 19882 | 19894, 19892, 19891 |
3.00” | 3” | 19886 | 19895 |
3.25” | 1-½” + 1” + ¾” | 19885, 19884, 19883 | 19894, 19893, 19892 |
3.50” | 3” + ½” | 19886, 19882 | 19895, 19891 |
3.75” | 3” + ¾” | 19886, 19883 | 19895, 19892 |
4.00” | 3” + 1” | 19886, 19884 | 19895, 19893 |
4.25” | 3” + ¾” + ½” | 19886, 19883, 19882 | 19895, 19892, 19891 |
4.50” | 3” + 1-½” | 19886, 19885 | 19895, 19894 |
4.75” | 3” + 1” + ¾” | 19886, 19884, 19883 | 19895, 19893, 19892 |
5.00” | 3” + 1-½” + ½” | 19886, 19885, 19882 | 19895, 19894, 19891 |
5.25” | 3” + 1” + ¾” + ½” | 19886, 19885, 19883, 19882 | 19895, 19893, 19892, 19891 |
5.50” | 3” + 1-½” + 1” | 19886, 19885, 19884 | 19895, 19894, 19893 |
For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.
