Waist-level viewfinder equivalent full focal length of about 28mm/35mm. [Window ratio 28mm about 16:9, 35mm about 4:3]. [The display mirror is a special lens with concentric circle texture, which is not obvious when placed at the waist].
eBay
Our IWB Hybrid design has a leather backing that is smooth and comfortable against your body. The design is intended to maximize comfort and protect the finish of your firearm while making it easily accessible in a variety of situations.
eBay
GCL32D Optical Level Device Optical Laser Level Auto Level 32x Optical Auto Level Mapping Level. Dial Unit: 1. Tripod adapter: 5/8" thread. Level Accuracy: 8'/2mm. Field of View: 1°30'. Compensator Type: Magnetic Damping.
eBay
Autofocus: 11-point focus (9-point cross sensor in the center). 920,000 dots. ISO sensitivity: ISO 100-25600 (when set to extended). Wide range of colors (more than 100 combinations possible). Other features.
eBay
eBay
Here’s a clear overview of both components • Accuracy: ± 1.5 mm per km double run leveling. • Field of View: Wide, bright optics for clear images. • Durability: Rugged, weather-resistant housing suitable for outdoor use.
eBay
Bright Optical Waist Viewfinder. 1X Waist Level Viewfinder （as your choosed）. The reason why I start making those is all my friends like it. Can't find anything similar in the market or there is a few low quality antique ones.
eBay
The analyzer applies the principle of photochemistry and is used with blood lipid test strip(ML-301). The whole blood sample to be tested is added into the sample area of the strip. In the process of rapid infiltration, blood cells are filtered out or dissolved.
eBay