The Canon EF 16–35mm lens is a family of professional wide-angle lenses made by Canon. The lens has an EF mount to work with the EOS line of cameras. Other than the front element, it is sealed against dust and water, and features a diaphragm which remains nearly circular from f/2.8 to f/5.6. Some of the features include: EF Mount L-Series Lens Aperture Range: f/2.8 to f/22 Two UD and Three Aspherical Elements Fluorine Coating Internal Focusing Ring-Type USM AF Motor Full-Time Manual Focus Override Water- and Dust-Resistant with Filter Nine-Blade Circular Aperture Minimum Focusing Distance: 11″ Return to My Gear.
The Canon EOS 10D is a discontinued 6.3-megapixel semi-professional digital SLR camera, initially announced on 27 February 2003. It replaced the EOS D60, which is also a 6.3-megapixel digital SLR camera
High-dynamic-range imaging (HDRI or HDR) is a set of techniques used in imaging and photography to reproduce a greater dynamic range of luminosity than is possible with standard digital imaging or photographic techniques.
With a unique 12-megapixel 35mm sensor, the Sony A7S is able to shoot in very low light with impressive high ISO performance up to ISO 409,600! The sensor is tailor-made for 4K video for excellent detail, plus very wide dynamic range. XAVC S high bitrate format provides higher quality Full HD video, plus expanded pro-level video features such as SLog2 gamma make for a solid hybrid photo/video camera. Some of the features include: 12.2MP Full-Frame Exmor CMOS Senso BIONZ X Image Processor Gapless On-Chip Lens Design 3.0″ 921.6k-Dot Tilting LCD Monitor XGA 2.36M-Dot OLED Electronic Viewfinder Full HD Recording in XAVC S 4:2:2 UHD 4K Output via HDMI Full Pixel Read-Out, S-Log2 Gamma Expandable Sensitivity: ISO 50-409600 Fast Intelligent 25-Point AF System Return to My Gear.
During long night sky exposures the starts appear to be moving across the sky due to the earth's rotation. This causes what are most commonly referred to as "star trails". Sometimes this is a desired effect but most often we try to eliminate them where possible. Especially when photographing the Milky Way. For this reason, The 500 Rule was created.