Celestron Omni 4mm Plossl vs Celestron Omni 9mm Plossl: specs compared
Updated 05 September 2026.
1
specs differ
Celestron Omni 4mm Plossl and Celestron Omni 9mm Plossl differ on 1 spec: focal length.
| Spec | Celestron Omni 4mm Plossl | Celestron Omni 9mm Plossl |
|---|---|---|
| Focal length | 4 mm | 9 mm |
| Apparent field of view | 50 degrees | 50 degrees |
| Barrel size | 1.25 in | 1.25 in |
| Eye relief | 6 mm | 6 mm |
| Optical design | 4-element Plossl | 4-element Plossl |
Questions and answers
How do Celestron Omni 4mm Plossl and Celestron Omni 9mm Plossl compare?
Celestron Omni 4mm Plossl and Celestron Omni 9mm Plossl differ on 1 spec: focal length.