Watch the Diminished Ideas online guitar lesson by Jeff Beasley from Shred Ahead Blues Rock
The fingering of this diminished arpeggio is a bit more player friendly. It launches on the flat five of the modern approach to the pentatonic scale which includes the flat five. Also, the flat five is the characteristic note of the diminished arpeggio. Anything diminished gets its name from this idea of decreasing the distance from, in this case the five to the root.