Digital Camera Basic Knowledge Lens - what is focal length
AvantesVarius
Opticalspectrometer
It was a large room, going far back, and the rich old red flock paper was peeling from the walls in long strips, and blackened with vague patches of rising damp; the ancient clay, the dank reeking earth rising up again, and subduing all the work of men's hands after the conquest of many years.
The luncheon was laid in a low room, with a beam running across the ceiling; the walls, once bright with red flock paper and much gilding, were soiled and dull now, after the manner of a great many of our dining-rooms.
Edmund OpticsSpectrometer
The AvaSpec-Mini-CL series can be equipped with a 2048 pixel CMOS detector or our first-to-the-market 4096-pixel array. Enjoy the speed and enhanced native UV/NIR response of CMOS with an incredible resolution of up to 0.09 nm unavailable anywhere else. The low stray-light design allows stray-light levels from as low as 0.2% and the fast response time boasts data transfer speeds as fast as 4.6 ms/scan and integration times ranging from 30 µs to 50 s.
It was never very light in that room, for the walls were covered with a crimson flock paper and the woodwork was black; while the windows, which looked on the canal, were always shaded till dark.
It was a chamber over forty feet long, with dark flock paper and dark curtains, with dark painted wainscoating below the paper, and huge dark mahogany furniture.