I just bought this lens it turned out to be an
[color=#282828][font=helvetica, arial, sans-serif]ISCO Iscorama Anamorphot 1,5x[/font][/color][color=#282828][font="arial, sans-serif"][size="2"] 54 and it is in good condition[/size][/font][/color]
[color=#282828][font="arial, sans-serif"][size="2"]It has 77mm thread so I have to figure out how to mount it on my lens[/size][/font][/color]
[color=#282828][font="arial, sans-serif"][size="2"]So far I tested it against Carl Zeiss FLEKTOGON 35mm on canon 550d[/size][/font][/color]
[color=#282828][font=arial, sans-serif][size=1]And I did not notice any vignetting but it was a quick test just by holding camera against the lens.[/size][/font][/color]