About 5 minutes in Photoshop
Started a new project with a white background,
Added your logo as a new layer,
Cut out a bit of the logo to make room for text,
Added "IS" text in white then moved it into the logo,
Added "PHOTOGRAPHY" text in black and in a slightly smaller size then moved it into the logo,
Added a drop shadow to "PHOTOGRAPHY" text,
Merged layers and saved,
Done!.
