We found one dictionary that defines the word focussing/focusing helical:

Tech (1 matching dictionary)

1. PhotoNotes Dictionary of Film and Digital Photography (No longer online)

▸ Words similar to focussing/focusing helical ▸ Usage examples for focussing/focusing helical ▸ Idioms related to focussing/focusing helical ▸ Wikipedia articles (New!) ▸ Words that often appear near focussing/focusing helical ▸ Rhymes of focussing/focusing helical ▸ Invented words related to focussing/focusing helical