through the Nikon F-Mount - Nikon SG-3IR - an inexpensive but very helpful accessory
Nikon SG-3ir IR-panel - Begagnad - Almqvist Foto
Nikon SG-3IR IR Panel for Built-In Flash (D200, D70, D70S) at KEH Camera
Menu e3: Nikon DX SLR (D40-D90, D3000-D7500) Talk Forum: Digital Photography Review
Amazon.com : Nikon SG-3 IR Panel for Built-in-Flash : Camera Flash Accessories : Electronics
Nikon SG-3IR IR Panel for Built-in Flash D200, D70, D70S Boxed from Japan | eBay
Nikon SG-3IR IR Panel for Camera with Built-In Flash Speedlight | eBay
Nikon D7000 with Nikkor 16-85/3.5-5.6 and SG-31R IR panel | Flickr
Nikon Integrated IR Panel SG-3IR for DSLR Camera Built-In Flash from Japan New | eBay
New SB900 Speedlight SB-900 cover SB-910 Flash IR Infrared SB910 Red Cover Focusing Panel part for Nikon SB900 COVER
Nikon D200 IR | Geospatial Modeling & Visualization
Used Nikon SB-R1 Macro Speedlight Remote Kit (inc Case, Stands, Ring Mount & Adapter Rings, Clamp Arm, Diffuser Panel, SG3-IR Panel etc)| London Camera Exchange -Southampton (Civic Centre)
D90 - light reflected with any sync speed below and including 1/200 in commander mode: Nikon DX SLR (D40-D90, D3000-D7500) Talk Forum: Digital Photography Review