Black Friday Promotion: Unbeatable Deals and Exclusive Gifts!    >> 

SV197 1.25inch Cheshire Collimating Eyepiece for Newtonian Reflector Telescope

SKU: W9154A
US$ 18.74 -25%
List Price: US$ 24.99
  • 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;

In Stock Out Of Stock

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.

2 reviews

Write a review

Works great for calibrating your telescope.

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.

Very helpful

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.
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.

Ask About This Product