Hood depth

The length of hood depth is very important to avoid unnecessary strong light that would do harm on a clear and transparent picture causing flare, this is especially said on old designed optical construction while period the technology had been developed enough, both coating on glass materials methods and lens element designing construction. No argument is necessary on importance of a device to cut off any harmful stronger light source invasion on the imaging format no matter how it is a conventional silver salt film or digital formatting image. If I mention some ideal opinion on this topic, Barn-Door for movie camera should be invited even in still camera field and be adjusted rotating it cutting any harmful light sauce invasions occasionally for every shot.
Based on this concept, did I actually check the hood depth that is necessary for Minolta MC ROKKOR PF 58/1,4 standard lens under the condition, most closest iris setting at infinity helicoid position. As an experimental trial attempt, I put longer one for 135/3,5 with 55mm diameter resulting the proof, even far longer hood depth was not enough for 58/1,4 if used on APS-C narrower imaging format, lacks 15mm forward!?
It looks so trifles as to be ignored, but stacking things small and trifle is important and the result of things stacked is not trifles no more than things great, so I conclude today.