The Pentax AF540FGZ II Flash is an on-camera flash that is compatible with Pentax DSLR cameras. The AF540FGZ II has a guide number of 177′ at ISO 100 and an effective range of 2.6 to 26.2′. Additionally, it features an all weather construction with 28 seals that pairs with Pentax weather-resistant cameras for safe operation in all conditions.

Product Features

• Wireless Functionality with 4 Channels
• Full Manual and P-TTL Exposure Control
• Guide Number: 177′ at ISO 100
• Effective Range: 2.6-26.2′ at f/5.6
• Weather-Resistant Construction