Adapted lenses and choice of shutter type

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Magnar W
Magnar W Veteran Member • Posts: 5,914
Adapted lenses and choice of shutter type
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I did a simple test with my Sony A7rII and an adapted lens to find how different types of shutters works. This will probably be of interest for many that use series 7 Sony cameras. ISO was adjusted to ensure even brightness, and shutter speed goes from 1/8000 sec at top to 1/250 sec at bottom, with one full stop difference.

Even at 1/1000 sec, the image shows a darker band at the upper part with EFSC enabeled, and it gets worse as the shutter speeds up.

  • Mechanical shutter - works fine for most tasks, but mechanical first shutter curtain might cause vibration that smoots out finest detail
  • Electrnic First Shutter Curtain (EFSC) - might cause a dark area in the upper frame, or uneven exposure at very fast shutter speed. This is rarely seen with hative lenses, but is common with adapted lenses. Might also affect bokeh for very bright lenses at very fast shutter speed. There is no shutter vibration, though.
  • Full electronic shutter, Silent Shutter - has pretty slow readout speed and is not recoomended for fast moving subject, panning, etc. since this shutter type can introduce rolling shutter effect.

 Magnar W's gear list:Magnar W's gear list
Sony a7 Sony a7R III Sony FE 90mm F2.8 macro Zeiss Loxia 21mm F2.8 Zeiss Loxia 35 +2 more
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