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.
Had opportunity a few months ago to get out under a new moon and give my new Sony 20mm f/1.8 prime lens a test and see how it stacked up against the Sigma 20mm f/1.4 which I had been using for quite a while. Both are awesome lenses with the Sigma is also noticeably brighter, however it has its faults. And that is heavy coma up in the corners which unfortunately do not clear up a great deal as you stop down the lens. It is this fault that had me very interested in the Sony 20mm option from the moment it was announced and in this video we take a bit of a look at how they compare. Finishing off the video is a time lapse taken over several hours using these two lenses on my A7S and A7R.