Recurve sight from Shibuya.
This model (520-9-A) is a classic sight for the recurve archer. There is a large vertical adjustment range of 107 mm, which is especially useful with a draw weight of less than 40 lbs (for comparison: Shibuya Ultima II RC: 97 mm, Arc Système SX200 95 mm, Decut DC-RE 100 mm, Win&Win WS700 109 mm).
This sight is equipped with a type "A" extension bar, which means that it is stiffer than type "B" (see recommended products below). The stiffer model is especially designed for archers with a higher draw weight to better cope with the higher/stronger vibrations. However, the type "A" extension bar is also suitable for archers with a lower draw weight. Type "A" is 12 grams heavier than type "B".
Key features:
- The Ultima RC PRO is the newest member of Shibuya's Ultima family.
- The extension bar is made of carbon and most of the other parts are made of light and strong aluminium.
- Attractive, modern polygonal extension bar design for even better damping and vibration control.
- The vertical threaded rod is suspended in a damped manner to prevent vibrations and noise.
- Sight block is guided over two diagonally mounted surfaces with plastic glides, thus no play between sight carriage and rail.
- Large knob for quick adjustment or removal of the sight block.
- The quick adjustment screw has a larger contact surface to the extension bar and thus ensures that the extension bar is fixed even more securely.
- Fine adjustment of the vertical axis 1/480" (0.05 mm) per click.
- Fine adjustment of the horizontal axis 1/640" (0.04 mm) per click.
- There is a metal scale on both sides of the adjustment rail. One has a standard scale, the other is blank and can be individually labeled.
- The locking screw of the lateral coarse adjustment has been replaced by a thumb screw and can thus be loosened by hand.
Technical specifications:
| Right-/Lefthanded: |
Models for RH and LH available. |
| Length of extension bar: |
APD* 249 mm |
| Adjustable length of the extension bar: |
60 mm with 5 steps |
| Travel per step of the extension bar: |
12 mm |
| Length of elevation rail: |
5,2" / 132 mm (4,2" / 107 mm adjustable range) |
| Inch / mm epr click (vertical): |
1/480" / 0,053 mm |
| Inch / mm per Revolution (vertical): |
1/24" / 1 mm |
| Horizontal adjustable range: |
5,4 mm |
| Inch / mm per click (horizontal): |
1/640" / 0,04 mm |
| Inch / mm per Revolution (horizontal): |
1/32" / 0,8mm |
| Thread for scope: |
8-32 UNF standard for recurve |
| Weight: |
233 g |
* APD: Aperture Distance = Distance between sight pin and mnounting point at the riser.
