Nikon's semi-pro APS-C DSLR with 12.3MP sensor, dual card slots, and video — the D300 successor.
The Nikon D300s was released in 2009 as the successor to the D300, adding 720p video recording and a secondary SD card slot alongside the primary CompactFlash slot. The 12.3MP DX CMOS sensor, 51-point AF system, and 7fps burst rate continued from the D300. Weather sealing is built into the magnesium alloy chassis. At approximately 825g with battery it is a professional-grade APS-C DSLR. A battery grip (MB-D10) extends burst speed to 8fps.
The 12.3MP DX CMOS sensor pairs with EXPEED processing. The 51-point Multi-CAM 3500 DX AF system provides 15 cross-type points. Burst shooting runs at 7fps (8fps with MB-D10 grip). 720p video at 24fps — no 1080p. Weather sealing throughout. Battery life approximately 1,000 shots using the EN-EL3e. Body weight approximately 825g with battery and card, dual card slots (CompactFlash primary and SD secondary).
The D300s retained the D300's 51-point AF and 7fps while adding 720p video and dual card slots — the SD secondary enables JPEG overflow or direct field copying between cards. The 720p limitation reflects 2009 DSLR video technology; the D7000 (2010) added 1080p. The 51-point AF with 15 cross-type points remained the APS-C DSLR benchmark at launch. The EN-EL3e battery, specific to the D300/D300s series, provides approximately 1,000 shots per charge.
On the used market the Nikon D300s is affordable as a vintage professional APS-C DSLR. Condition checks: shutter count via EXIF, CF and SD card slot contacts, weather sealing at port covers, and EN-EL3e battery health — specific to the D300/D300s, D200, and D80, not shared with the EN-EL15 series. The D7200 provides significantly better image quality and modern DSLR performance. Compatible with all Nikon F-mount lenses; screwdrive AF-D lenses autofocus on the D300s's built-in AF drive motor.