Hi bro thanks yeah the lens seems to perform well and noticed very less barrel distortion the imagine posted are not been corrected just crop a bit to remove the vignette. Yeah it's big bigger than my Leica-R 21mm Super Angulon

yes the lens could take filter (77mm) one thing I like with it also. Sadly my FL-NEX adaptor upon visual checking seems the one causing the Vignette than the lens.
My lens although has a marking it say "R" but it looks like the FL non-R version :-(
Some spec of the lens
Name : Canon Lens FL 19mm F 3.5
Focal Length : f=19mm Aperture Ratio: 1:3.5 Construction: 7 components, 9 elements
Coating : Magenta, Purple Diaphragm: Manual type Min. Aperture: 16
Distance Scale : 0.5-7 OO in meters, 1.75-20 OO in feet
Angle of View : Diagonal 96°, Horizontal 87°, Vertical 65°
Focusing System :Straight drive double helicoid
Hood: None Filter Size: 77mm Length x Max. Dia: 18 x 63mm (11/16" x 2-1/2") Weight: 150 grams (5-5/16 oz.)
Pix and spec taken from MIR site