[kh99]

I guess you'd want something like:

<img src="images/misc/equipos/{post.field10}">

and maybe something after {vb:raw post.field10}, like .jpg or .gif if you need it.

Also if there's a possibility that a user hasn't chosen any image, you might want to check for it, like:

<vb:if condition="$post[field10]"><img src="images/misc/equipos/{vb:raw post.field10}"></vb:if>