laser lens size

[stan kern]

i meant to order a 20mm 63.5 focal and i slipped up on the selections and i got a 19.1mm 63.5

it looks close will it be ok to use it , seller will not take the 19.1mm back

[Kev Williams]

depends on your lens holder, should be okay if there's enough lip to prevent the lens from falling thru- and there should be, there's only a .020" difference all around between 19 and 20mm.

[stan kern]

checked and its ok , thank godness