A recent article on Petapixel on Adobe Lightroom CC (the upgrade from the regular Adobe Lightroom) has my interest piqued. LR now comes with a dehazing tool that reportedly does great stuff to photos that have haze in them. A lesser-known application is the automation of contrast and exposure adjustment to astrophotographs. I decided to revisit one of my older photographs of the Milky Way from Yosemite and try it out. The result is below.
Tag Archives: Astrophotography
On Nikon’s Mode 3
The so-called Mode 3 is an undocumented Nikon DSLR feature which I came across on the internet when looking for noise reduction techniques in astrophotography. There’s some information on it here but nothing specific to the D700. It’s possible that Mode 3 is irrelevant for later Nikon DSLRs.
On Didymium
Didymium filters, also known as the “poor man’s sky glow filter” are used as safety goggles by glass blowers. Didymium glass selectively blocks the radiation component emitted by sodium in glass (589 nm), which is also the predominant component of regular sodium-vapor street lamps.
Prasenjit Sengupta, Ph.D. 