Drawing and homemade view finder tool

In typical Chicago spring fashion, it's snowing here today.  Lucky for me, I have my own make believe spring growing right here in my studio.  This is the completed drawing on the 10x10 canvas, basically the same as my last post's drawing, except bigger and on canvas.  I did spend more time with this one, and I really loved every minute of it.  

Since this is more or less repeating my last post, I thought I would show my little homemade view finder tool.

I made this years ago, as you can see by the smudges and dried paint, from a 5x7 gray mat you can purchase for framing photos.  I cut the corners, then marked off the interior edges, starting at the corners going out, every half inch.  I can view my set up through my adjustable opening and determine exactly what size canvas will make the best composition.  Once that is decided, I paperclip the corners and continue to use it to help locate the major shapes during the drawing phase.  The mid-toned gray can be used to judge values as well.  

Now back to fun with flower!