The Metz Mecastudio BL-400 Flash Head is an excellent flash head for studio photographers looking for a high-quality product at a reasonable price. Metz have focused their 70 years of experience in the photo-flash field into producing this cost-effective, yet highly capable and well-built head, with top-of-the-line features. With 400w output and a guide number of 65, the BL-400 is powerful enough for most applications and settings; and further boasts an integral, adjustable modelling lamp, overheating protection, a LED display and a 6 f-stop power range, adjustable in 1/10-stop increments.