Along with several leica primes that I have used with my R3 and SL are two Tamron 2 Adaptalls. I have both the SL and the R adapters. I recently purchased an R8. I was suprised to learn that my non APO 2X extender could not be used along with a number of other lenses. Is it safe to use the Adaptall with the R8 (I have a 24 and a SP 70-210 3.5 Tamron)?