One of the great advantages of the Sony E-mount system is the reduced flange distance afforded by its mirrorless design. This allows for easy adaption of lenses designed for other camera systems such as the Canon EF or Nikon F mounts. For the last few years I have been using a Canon EF mount version of the Tamron SP 45mm f/1.8 Di VC USD for astrophotography which I largely picked up for its optical image stabilisation for use with my unstabilised Sony a7S. There are certainly wider aperture prime lenses available in this popular 35mm to 50mm, however aperture isn’t everything. Having now sold my copy of this Tamron lens in favour of the much smaller and lighter Samyang 35mm f/1.8 Tiny Prime, I take the opportunity in this video to take a closer look at the astrophotography related performance of this lens before sending it on to its new owner.