Telrad Riser Base (New Version) Planisphere 6 μm RMS across image

6 μm RMS across image circle Optical Coatings StarBright XLT Off-axis Illumination 93% at 11 mm (

Multi-coated optics increase light transmission resulting in brighter and sharper images with high contrast levels

Back Focus: Adjustable

2 system allows for shorter exposure times compared to traditional f/10 astroimaging

Telrad Riser Base (New Version) Planisphere 6 μm RMS across imageThe Riser Base is available in nominal 2. 5" and 4" heights. Used in conjunction with the existing mounting base, it acts to offset the sight from the main tube for easier viewing. Select 2. 5" or 4" Riser base. These are the newer version of the risers that are injection molded.