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Main tube outer diameter：174mm
especially if light pollution is a significant problem
the Air offers an incredibly convenient alternative
One of the key advantages of the PHQ design is the integrated flat-field optical system
SharpStar SCA260 Aspherical Cassegrain Telescope 260mm - Fast f/5 Optics
RT90 or RT90 (GPS) + USB Programming Cable imx290 camera Main tube outer diameter：174mmRT90 or RT90 (GPS) Digital ham Mobile radio supports analog and digital mode It provides dual band, dual standby, a dual display, dual time slot, operating on both 400 480MHz UHF frequencies and 136 174MHz VHF at up to 50 watts VHF and 45 watts UHF. Using Time Division Multiple Access (TDMA) digital technology,AMBE++vocoder, compatible with Mototrbo DMR Tier I &II. The RT90 supports 250 zones, 3000 channel, 10000 contacts, it has built in CTCSS DCS,
