Optolong CLS Filters

Optolong CLS FiltersThe Optolong CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i. e. skyglow). Together with the highly

Frequency Range PMR446 Channel Number 16 Output power 0

Each pager has a built-in 300mAh lithium battery

and guaranteed to meet specs even after years of use

Maximum Receivers: 998

sky temperature

5mm earphone jack

Applicable models: Retevis RT97 RT9550 RT92 RT74 Mobile Radio

Built-in 1200mAh lithium upgraded battery for transmitter and receivers

Underneath the Base is a 3/8 thread which can mount to many of todays popular photo tripods

5/15/20/25/30/50kHz Scrambler function 8 Group’s Scrambler Wide/Narrow Band Yes P1-P5 with programmable functions Yes Voice pressure /expansion function Yes Repeater offset shift Yes Contact book Yes ANI ID Yes DTMF/2 tone/5 tone coder Yes Remote kill/ stun/ activate/ revive Yes Keypad lock function Yes 0-9 SQL grade setting Yes 1750MHz tone Yes Reverse frequency Yes Auto Power off Yes VOX function Yes Busy lockout function Yes Scanning function Yes COMP function Yes Monitor function Yes CTCSS/DCS setting and scanning Yes TOT function Yes Battery voltage display Yes Channel name display/editing Yes Emergency alarm Yes Keypad lock function Yes Power saving function Yes LCD Backlight Yes Chinese and English voice prompt Yes PC software programmable Yes Specification Frequency stability ±2

Clear aperture: 26mm (1

Allows nearly 100% transmission of O-III and H-beta lines