Up for sale is a fantastic example of Canon’s FD 24mm f/2.8 Super-wide angle lens. Introduced with the “new” FD line of bayonet mount lenses, this model retains the excellent image quality of its breech-mount predecessor, with reduced size and weight. Additionally, this lens has been completely disassembled and CLAed (Cleaned/Lubed/Adjusted), with cleaning of individual components aperture cleaning and total helical cleaning/relube for exquisite like-new performance! This lens features the Canon FD mount (bayonet type) which can be used natively on Canon film SLRs. Digital mount compatibility chart. Canon EOS M Mirrorless. Canon EOS R Mirrorless. Put quite simply, lenses get dirty over time. However, opening them up tells a quite different story. While these lenses may appear tightly built, they nearly all use open designs, which allows substantial amounts of dust, dirt, and grit to enter the lens, where it settles into delicate precision components, adversely affecting the mechanical properties of the lens and leading to increased wear. Furthermore, even in unused samples, lubricants tend to degrade over time, leading to degraded focus action as grease dries out, or slow blades and soiled optics as oil migrates within the lens. Q: What services do you perform on the lens before sale? With the lens disassembled, I perform a full CLA (Clean Lube Adjust). This entails cleaning out any internal and external soiling, cleaning aperture blades of grease that can slowing, re-lubing the focus helical, and adjusting all components for tightness and accuracy. Where there is extensive dust or internal lens soiling, I will disassemble lens cells and clean off surfaces; however, it is my general philosophy to keep lens elements in their factory positions in assembled cells when at all possible to ensure optimum performance. What do you mean DUST? Vintage lenses have dust in them. In fact, they had dust in them when they were brand new from the factory! This is because prior to the advent of very modern sealed designs, lenses were not put together in a clean room environment, and the natural static charge of the glass tends to attract dust particles. Coupled with the open designs used in these lenses, it is virtually impossible to find any vintage lens without some degree of dust particles visible when you look closely through the lens. All of my CLA lenses have at minimum the exterior and internal cell surfaces wiped with a dust-free, lab-grade optical tissue and then blown off with an air bulb prior to reassembly and thus have a significantly below average amount of dust for a vintage lens.