Olympus SHG Four Thirds Lenses — Do They “Cover” more than a Four Thirds/MFT Sensor?
UPDATE: it appears that I made a mistake in measurement. I have revisited this topic in my October 21 entry.
I’ve been speculating that the Olympus SHG (Super High Grade) zoom lenses might actually have been engineered to cover more than a Four Thirds sensor (FT is the same size as Micro Four Thirds). My speculation is based on the fact that the performance of the SHG lenses is so outstanding, even compared to Leica M glass.
The flange focal offset is all wrong, but I focused the Olympus SHG 14-35mm f/2 ED at infinity at ~25mm zoom, and shown below is what I found for the coverage of the 14-35 on the full-frame Nikon D800.
I also measured the size of the projected image circle with the lens focused at infinity and zoomed to 35mm. The circle measured ~23mm.
Since the sensor diagonal for the FT and MFT formats is 21.6mm, this proves that the Olympus SHG lenses have no potential to cover a sensor larger than Four Thirds / Micro Four Thirds.
Well, that’s a bummer, but the SHG lenses are still by far the best quality lenses for any Four Thirds or Micro Four Thirds camera.