Your zeiss zm 21/2.8 looks so nice! — no visible distortion, pretty sharp. I think 90º angle of view is one of the most interesting which wide-angle lenses can deliver. Regarding the practical side, are you using an external viewfinder on you leica body or are you using the built-in 28mm framing lines?
Hey Luiz, good to see a comment/question from you again!
In answer to your question, I am not using an external viewfinder… I just use the entire viewfinder as an approximation and it allows me a margin of error when composing.
Prosophos 
Hi Peter.
Your zeiss zm 21/2.8 looks so nice! — no visible distortion, pretty sharp. I think 90º angle of view is one of the most interesting which wide-angle lenses can deliver. Regarding the practical side, are you using an external viewfinder on you leica body or are you using the built-in 28mm framing lines?
Hey Luiz, good to see a comment/question from you again!
In answer to your question, I am not using an external viewfinder… I just use the entire viewfinder as an approximation and it allows me a margin of error when composing.
Always a pleasure to visit your site!