The 18mm, 24mm and 35mm lenses were the first in the range of Canon K35 lenses to be converted into TLS cam form. Classed as the most complicated to convert in the series, these three lenses required an intensive design and development process. The 55mm and 85mm were then completed with the fixed rear glass being housed in the stainless steel PL mount. The conversion process covers all variants in the K35 series.