Salted Line Sea Frogs Underwater Camera Housing for Sony A7IV with 4'' Glass Flat Port

A7IV: Ocean's Black Precision Salted Line CH A7IV Underwater Housing for Sony A7IV Cameras | 4'' Long Flat Port | Optical Glass | Orange 90mm Bayonet|40m/130ft|4'' Long Flat Port|Optical Glass|Orange Also available on the Salted Line website Also available on the European website The Salted Line A7IV Housing with a 4-inch Optical Glass Flat Port bundle is designed for use with the Sony A7IV camera. It supports a range of zoom and prime E-mount lenses, providing zoom or focus functionality for some of them. Flat glass ports are ideal for both prime and zoom lenses when shooting at the water's surface. While they can be used underwater, keep in mind that a flat port can reduce your lens's angle of view by up to 28%. For optimal results with wide-angle and fisheye lenses, a dome port is recommended instead. Thanks to its compact dimensions and lightweight design, the 4-inch glass flat-port bundle is the most travel-friendly option available. This housing provides full control of all camera functions (except the joystick and Still / Movie / S&Q dial) and is equipped with a standard bayonet mount featuring a 90mm diameter, compatible with a wide range of Sea Frogs dry flat and dome ports (except those made for A6xxx and RX1xx camera housings). The control buttons feature a 50% increase in spring stiffness, providing superior tactile feedback for precise control. Whether you're into underwater or surf photography, this housing offers enhanced durability, functionality and precision, making it the ideal choice for users seeking to capture stunning images in challenging environments. The Salted Line A7IV Housing version offers several upgrades over the standard Sea Frogs housing, including: Enhanced Security: Durable stainless steel latches with locking pins. Improved Visibility: Larger LCD screen window improves visibility. Precision Control: Compatibility with a detachable 2-stage shutter grip trigger. Frequently Asked Questions How deep can it go? +The Salted Line housing is rated for depths of up to 40 meters (130 feet), ensuring reliable underwater performance.What dome and flat ports are compatible? +The housing uses a 90mm bayonet mount, compatible with all Salted Line / Sea Frogs dome and flat ports for that bayonet size.Does it include a port? +No port is included. Ports are sold separately.What O-rings and maintenance is required? +Inspect and lubricate the O-ring before every dive. Replace O-rings at least once per year or every 50 dives. Use only Salted Line / Sea Frogs silicone grease — third-party greases may cause leaks.Can I connect an external strobe without an optical cable? +The housing features a standard Synchro cable port for direct strobe connection, in addition to dual fiber-optic ports (Sea&Sea type).Does the shutter grip come included? +No — the detachable shutter grip with two-stage trigger is sold separately. Specifications Bayonet: 90mm (3.54'') Dimensions: Width: 200mm (7.87'') Height: 185mm (7.28'') Length: 130mm (5.12'') Weight: ±1105g (2.44lb) Compatible Lenses Sony Lenses: Sony FE 24-70mm F4 ZA OSS (autofocus, manual zoom gear available) Working range 35mm to 70mm Sony FE 90mm F2.8 Macro G OSS (autofocus, manual focus gear available) Sigma Lenses: Sigma 24mm F1.4 DG HSM Art E-Mount (autofocus only) Focus Gear not Available Sigma 35mm F1.4 DG DN Art E-Mount (autofocus, manual focus gear available) Tamron Lenses: Tamron 28-75mm F2.8 Di III RXD E-Mount (autofocus only) Zoom Gear not Available Key Features High-quality optical viewfinder Inbuilt leak detection sensor Interchangeable port system Synchro cable port Dual Fiber-Optic port (Sea&Sea type) Two stainless steel mounting plates 1/4" thread The reinforced metallic bottom plate Dual-sided metal latch locking system Detachable shutter grip with 2-stage trigger (not included) O-ring sealed buttons with spring Connect an external strobe with this housing. It will require a fiber-optic cable (purchase here) and a flash trigger (purchase here). Package Includes Salted Line CH A7IV Underwater Housing for Sony A7IV Cameras | 4'' Long Flat Port | Optical Glass | Orange x1 Spare O-ring Set x1 Silicone grease 5ml Housing body cap x1 Port Cap (Front) x1 Port Cap (Back) x1 Manual: Salted Line Sea Frogs Underwater Camera Housing for Sony A7IV Manual Please Note: Camera and lens not included with the housing. Disclaimer: Every effort has been made to ensure that the descriptions and images provided are accurate and up-to-date. However, occasional errors may occur, and product features, specifications, or appearances may change without notice. We recommend verifying any details that are critical to your purchasing decision.