I try to avoid adding options if possible. Every additional
option complicates the code, user interface, and
documentation. However, I was quick with the -fast option
(hehe) because frankly I was concerned about the performance
hit when I added the scanning for AFCP information, and was
prepared to fix this if it adversely affected anyone. Also,
an option was necessary here because there was no way to
work around this behaviour via the API.<br /><br
/>
But adding an option to select a particular brand of lens
along with all of the necessary support code is getting a
bit beyond the scope of the exiftool application. And since
this can be done in a custom script,<br /><br />
<code>my $make = 'Canon';
my $info = ImageInfo($file, 'LensType');
my $lensType = $$info;
my  types = split / or /, $lensType;
my myTypes = grep /$make/, types;
print 'My lens type is ', join(' or ', myTypes),
"\n";
</code><br />
I leave this one as an exercise for the determined
user.<br /><br />
- Phil
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