Baader D-ERF Energy Rejection Filters for H-alpha Solar Observation

Baader D-ERF Energy Rejection Filters for H-alpha Solar ObservationBaader Energy Rejection Filter (D ERF) H Alpha Solar Observation Filter The Baader Energy Rejection Filter (D ERF) is specifically designed for H alpha solar observation, allowing telescopes to achieve full aperture resolving power. This filter significantly reduces the thermal energy entering the telescope, protecting your solar spectrum filter and minimizing thermally induced seeing effects for a more stable and detailed observation experience.

There are fewer points of failure and fewer cables to catch

high quality polycarbonate

lowering the CMOS sensor temperature more than 35°C below ambient

100% brand new and high quality Model RHD-701 Band Dual band VHF/UHF Antenna type SMA-F Soft Antenna Frequency 144/430Mhz(136-174+400-470)MHz Gain 2dBi Max power 20 Watts VSWR Less than 1

75 GHz: ≤ -30 dBm Reception Analog Sensitivity -122 dBm (12 dB SINAD) Digital Sensitivity -120 dBm (BER ≤ 5%) Adjacent Channel Selectivity ≥ 65 dB / ≥ 60 dB Audio Distortion < 10% Receive Current ≤ 380 mA PM Noise ≥ 45 dB @ 25 kHz

Wide 60º field of view: The generous field of view provides immersive and comfortable observations

8 / 10 The ASI678MC isn't designed to do everything—and that's exactly why it's so good

which gives the FF80APO f/7

Easy Installation: Quick and simple to set up

Support user defined

It dramatically enhances contrast between objects glowing at 501nm and their background

Standby Time: 18-20 hours