Autumn is my favorite season; it's a time of change and duality.  Heat fading into chill, light fading into dark, green fading into brown.  I waited as long as possible to look at the entries for this week's photostream. and I'm glad that I did:  a theme presented itself.  As a lover of the time of year and of half frame cameras, the first piece below called out to me loudly, and as I looked at the rest I noticed a variety of common subjects.  So here I present to you a series of pairs.