The abbreviation of the English letters of the telescope sometimes has different meanings in different telescope brands. Generally speaking, the following are easy to identify:
(1) CF: Central focus
(2) ZCF: Traditional Porro prism left and right expansion type, center focusing
(3) ZWCF: One more “super wide-angle” (W) than the item (2)
(4) CR: Camouflage color rubber case
(5) BR: Black rubber shockproof housing
(6) BCF: black, center focusing
(7) BCR: black camouflage rubber shell
(8) IR: Aluminum alloy lightweight housing
(9) IF: Individual focus adjustment for left and right eyes
(10) WP: Waterproof type with nitrogen gas
(11) RA: External rubber anti-vibration protection
(12) D: German prism, roof prism (straight tube type)
(13) HP: high eyepoint
(14) SP: Super high resolution
(15) ED: Ultra-low chromatic aberration lens
(16) AS: Aspherical lens
(17) ZOOM: Variable magnification zoom lens
(18) WF: Wide-angle field of view