Do you have a question about the Celestron C90 and is the answer not in the manual?
Explains the manual's structure for spotting scope setup and operation.
Provides critical safety warnings to prevent eye damage and equipment damage.
Step-by-step instructions for attaching the spotting scope to a photographic tripod.
Steps to attach a camera body to the spotting scope for photographic use.
Safe procedures for observing the Sun, emphasizing solar filters and finderscope protection.
| Optical Design | Maksutov-Cassegrain |
|---|---|
| Focal Length | 1250 mm |
| Focal Ratio | f/13.9 |
| Aperture | 90 mm |
| Eyepiece Barrel Diameter | 1.25" |
| Mount Type | Not included (OTA only) |











