voidptr

# Many systems, such as Arch, MSys2, Cygwin, etc., need to have Bash interpret 
# their startup scripts, set Environment variables, etc. Therefore, setting your 
# default shell to anything other than Bash might not be a good idea. In these 
# cases, the conventional advice is to append 'exec fish' at the end of your 
# .bashrc. However, this approach creates another problem; should you need to 
# drop into Bash to run a bash script, you need to be careful to use 
# 'bash --norc' every time. Otherwise, Fish will start up again when you don't 
# want it to. Obviously, this is cumbersome and inefficient. Thus, instead of 
# doing a naked 'exec fish' at the end of your .bashrc, use the following:

voidptr

Optimal focus is at (about) 74.5

For best results with material of mm thickness (thk) use:

thk	set	("Focus" value [too low])

1	75		(70.5)
2	74		(69.5)
3	73		(68.5)
4	72.5		(67.5)