This is the Dorr DMF-15 Macro TTL Flash for Sony Alpha [371182] DMF-15 Macro TTL Flash is for Sony Cameras - connects by the connector rings included from 52 and 72mm. The macro flash can be halved to individually provide light. Has a guide number of 15 at ISO 100 and can be used either with TTL auto or manual setting. ...Contact us if you need more help.