I like the angle of this photo.

Ultegra is nice stuff although the Cassette is actually Deore XT from the MTB line. Still a 6000-level component, but with an 11-30 spread that suits my riding style and gives me a 1:1 gearing at the bottom of the grann ring.

The rear derailleur is rated at a very conservative 27t but has no problem with the 30t largest cog on this cassette due to the vintage-spec low hanger