Why is it not possible to use an ALEXA Mini or AMIRA in combination with the Impression V Filters? Is this also true for ALEXA Mini and AMIRA cameras that have been converted for use with Leica M mount lenses?

“A Signature lens with an attached Impression V Filter cannot be mounted to an ALEXA Mini or AMIRA because the filter protrudes into the lens port too deeply, and might lead to a mechanical collision between the camera and the filter. This could potentially cause damage to the Impression V Filter.”