Promaster P-TTL Flash Models
Promaster makes a series of P-TTL compatible flashes, and also has a module-based line. The module-based models require the 5050DXR/PX digital flash module.
- 5250DX — a very simple module-based model with a tilt head and non-zooming reflector.
- 5550DX — still basic, but this module-based flash adds a tilt and swivel head.
- 5750DX — a more powerful module-based flash with a non-motorized zoom and a secondary reflector.
- 7200EDF — a basic P-TTL-dedicated model with a bit more power.
- 7400EDF— this P-TTL-dedicated model adds a motorized zoom (and a power increase).
- 7500EDF— and this P-TTL adds yet more power, a swivel head, and a secondary reflector.
As with the Sigma flashes, firmware upgrades must be performed at the factory.
Note: as of September 2009, it has been confirmed that the 7500EDF does not work properly with the Pentax K-7 camera body. An update is pending.
And Promaster also has a macro ring flash, the MacroLume TTL Digital. This is module-based, and uses the same modules as the 5000-series flashes. Promaster informs me that modules and flash units shipped from the warehouse after August 2008 have the proper codes to communicate with current Pentax dSLRs but that earlier copies may need to be sent in for an update.
