For example, its suggested to use the code
<a href="/wiki/File:Lu3 1.tiff"><img src="https://upload.wikimedia.org/wikipedia/commons/d/db/Lu3_1.tiff" /></a>
To link to another website. This isn't going to work
*The link is a local link, other website is probably different domain
*The image src is to a tiff file, it should be to a thumbnail as most browsers cannot read tiffs
**Furthermore, for the file formats they can read, files are big, you probably don't want to insert a 200000px file on to another website (Same thing goes for the use directly inline on Wikipedia).
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