Sigma To Offer Installation of Rear Filter Holder for 14mm f/1.8 DG HSM Art Lens

[SecureGSM]

yep, that simple until you found out that you knocked camera's mirror with your quick solution, caused weather sealing problems, dust ingress, lens performance issues or something else to this effect. and now enjoying multi million dollar claims or have to ensure that technicians are trained, lens is serviceable and warranty can be honored past the installation.

I have learned that building a prototype and proper test runs is important.

As far as a one hour design, for something that simple. If it takes you longer then that to come up with a solution you would not have a job very long. Then again, the world is going to crap.. So what do I know..

 

[Antono Refa]

And what was / is the Canon's filtering solution for 11-24 F4 L ?

Rear gelatin filter, same as I would expect the Sigma 14mm f/1.8 to have been sold with from the beginning.