[Scythels]

re: lenscore - it's a good concept but a bit of flawed execution.  There are optics in between the sensor and camera - wwhat is their purpose?  Are they diffraction limited?  It sounds like the optics are a focal reducer / beam expander / other image circle modifying component.  Unles these optics are ultra fast and ultra well corrected (an impossible feat...) they degrade the performance of the lens in front of them.  Depending what aberrations are present in those optics different lenses will suffer (or be apparently improved) on a case by case basis.  For example, if those optics have overcorrected spherical aberration and a lens has undercorrected spherical, the sum is closer to perfect correction of spherical...  Or if they have coma, that can actually improve off-axis resolution when a lens has imperfectly corrected spherical aberration...

 

The test also puts lenses outside design spec.  What is the coverglass thickness on the sensor?  Is there a coverglass?  This will affect center performance some, and edge performance massively. 

 

They also fail to disclose what they are doing.  Are they imaging a test chart?  If they are, its resolution must be extraordinary to avoid limiting the performance of the lens. 

 

It would be easier to measure the lenses the way we do in my lab - through interferometry - than it is to do this.  Of course such a test can only happen at infinity, but it also has the benefit of having "no" limit to the resolution of the test.