Antlia Sulfur II (SII) 7nm Prime Narrowband 36mm Filter (ANT-SII-7NM-PRIME-36MM)

Antlia Sulfur II (SII) 7nm Prime Narrowband 36mm Filter (ANT-SII-7NM-PRIME-36MM)Antlia Prime narrowband filters optimize the FWHM (full width half maximum) to 7nm bandpass. The suppression of optical density is (OD) 4 on unwanted wavelengths. The excellent optical coating characteristics found in the Antlia 3nm Pro series has been incorporated into the 7nm Prime narrowband filters. The result is that these filters deliver superior SNR (signal to noise ratio) and better contrast in your images. Antlia 7nm Prime filters are

Single Filter FILTER SHAPE rectangular

making it easier to frame your shot just how you want it

This book is a must-have in your astronomy collection that you’ll find yourself enjoying for years to come

since they are nearly Parfocal

47FPS@16bit@640Lines

This makes the stars in the image brighter

shipping weight 0

A patented light weight Bahtinov mask is included to provide assistance in focusing

The ESATTO 2” low profile robotic focuser is compact and lightweight

5mm PL3304205 + PL3304201 + PL3304200 7 7mm T2 extension PL3304207 7

the SCT's secondary mirror can be removed and replaced with a field-flattening lens assembly (sold separately by third party manufacturers) so that a CCD camera can be used in the front of the telescope at the f/2 focus of the instrument's primary mirror

so you can see the complete solar disk without moving the binocular