User Activity

I have a Canon 5 DSr.  I like the mirror lock-up but when I use my ring flash (Sigma), I have an initial flash when I activate and a second flash at the time of exposure (if the battery recharges quickly enough).  Is there a way to prevent the flash ...
In Lightroom 6 one can chose a lens profile correction.  Unfortunately, I have 3 lenses that do not have a pre-set lens correction.  These lenses are the Macro MP-E 65, the original version of the TS-E 24mm and the TS-E 90 mm.Once one get these profi...