Product Detail
SV197 1.25inch Cheshire Collimating Eyepiece for Newtonian Reflector Telescope
- SV197 cheshire collimating eyepiece fits for Newtonian and SCT reflector telescopes; also useful for aligning refractor optics very accurately;
- The SV197 cheshire collimating eyepiece for accurate alignment of any Newtonian reflector telescope mirrors; ideal for ensuring the optical alignment;
- Peephole in top; The SV197 cheshire collimating eyepiece can directly see the result of the calibration;
- Precision machined from aluminium with fine crosshairs and a clear bright mirror with sighting hole;
- Easy alignment; no batteries needed; for secondary mirror collimation; can be used only during the day;
SV197 1.25inch Cheshire Collimating Eyepiece for Newtonian Reflector Telescope
The SV197 cheshire collimating eyepiece for accurate alignment of any Newtonian reflector telescope mirrors; ideal for ensuring the optical alignment
Fits in 1.25 inch focusers
SV197 cheshire collimating eyepiece can be inserted into 1.25 inch focusers or diagonals.
More Accurate than the Normal Collimation Tool
Collimation eyepiece is more accurate than the normal collimation tool, can help you better enjoy star watching-fun. Suitable for Newtonian Telescopes.
How To Collimate Telescope With Cheshire Eyepiece:
The view through the Cheshire eyepiece during the collimation will differ between telescopes. For fast telescopes (f5 and below), it will be little off-center, and for the slow telescopes (f5 and above), the view will be more centered and easier to collimate.
1.The goal here is to center the primary mirror reflection in the secondary mirror and reflection from the Cheshire with the secondary mirror.
2.To achieve that, you have to use the adjustment screws on the secondary and primary mirrors while looking through the Cheshire eyepiece collimator tool.
| Model | SV197 |
| Net Weight | 156g/5.51oz |
| Fit Size | 1.25''(31.75mm) |
| Material of Crosshairs | Steel |
| Body Material and Processing | Aluminum & CNC |
| Dimension | 141×41×32mm |
1.Made of high-quality aluminum material. Anti-rust, wear-resistant, and durable. CNC precision manufacturing, oxidation black, steel cross wire. the crosshairs are clearer and easier to use.
2.The inner structure can reduce light reflection to improve the clearness of view.
3.Collimation eyepiece is more accurate than the normal collimation tool, can help you better enjoy star watching-fun. Suitable for Newtonian Telescopes.
My laser collimator was driving me crazy - would collimate with the laser, pull it out, and even if I put it back in with the same orientation, the laser would not show centered the second time. So I bought this collimator to use with the laser for fine tuning and verification and it works very well in my 10 inch dob.
My telescope was out of calibration, so bought this to try to get a clearer picture. This made a big difference in my images through my telescope. Makes adjusting the mirrors a much easier task. A must have for your telescope.