ClarkVision.com

Terrestrial Volcanoes and the Color of Lava (added June 6, 2026)

Youtube Channel: @clarkvision-imaging (latest video May 18, 2026)

On-Sensor Dark Current Suppression Technology (Major updates May 19, 2026)

Exposure Time, f/ratio, Aperture Area, Sensor Size, Quantum Efficiency: What Controls Light Collection? Plus Calibrating Your Camera Updated December 6, 2025 (see new section: Per Pixel Level Signal Detection Controversy).

Canon R5 review New July 10, 2025.
This review is under construction but the results are so fantastic, I felt they should be released now. The low level uniformity sets new standards compared to all other sensors that I have analyzed or seen analyses for.

Planning Nightscape Photography Updated June 23, 2025.

Tracking Mounts for Deep-Sky Astrophotography Updated June 21, 2025.

What is the Best ISO to Use for Astrophotos? New May 22, 2025.

Do You Need a Modified Camera For Astrophotography? Updated May 21, 2025.

The Color of Nebulae and Interstellar Dust in the Night Sky Updated 01/10/2025.

How to Photograph the Sun: Sunrise, Sunset, Eclipses Updated March 6, 2024.

Black Point Selection in Astrophotos: Impacts on faint nebulae colors and solutions with rnc-color-stretch New July 3, 2023.

Advanced Astrophotography Image Stretching: New Software: rnc-color-stretch version 1.02. New June 29, 2023.

Astrophotography Made Simple New March 24, 2023.

Tracking Mounts for Deep-Sky Astrophotography New Febuary 22, 2023, Updated May 1, 2023.

Sensor Calibration and Color New July 6, 2022.
Added new information on S/N versus workflow July 28, 2022.

Aurora Photography Updated April 11, 2022.

Aurora Photo Gallery added April 8, 2022.

Source code for imaging spectroscpopy analysis released on guthub April 8, 2022.

Image Processing: Stacking with Master Dark vs no Dark Frames New article, November 28, 2021.

Blue Lions on the Serengeti and Natural Colors of the Night Sky New article, August 18, 2021.

Updated information on meteor photography. August 10, 2021 The Perseid meteor shower peaks on the morning of August 12, 2021 with no interference from the Moon. Be ready!

A Revolution Coming to Photography New December 19, 2020.

High Dynamic Range Hardware and 4K UHD HDR Movies New December 19, 2020.

Exposure Time, f/ratio, Aperture Area, Sensor Size, Quantum Efficiency: What Controls Light Collection? Plus Calibrating Your Camera New December 7, 2020.

2d2) Color Astrophotography and Critics New May 29, 2020, updated June 5, 2020, August 23, 2020.

4e) Do You Need a Modified Camera For Astrophotography? Updated June 5, 2020.

Beginning Astrophotography: Star Trails to Nightscape Photography May 31, 2019.

A Series on Color:

• Color Part 1: CIE Chromaticity and Perception (New: May 23, 2019)
  • Introduction
  • CIE Chromaticity: XYZ Color Matching Function Calculations
  • Stiles and Birch Chromaticity: The 1931 Color Matching Function Calculations
  • CIE Color Errors
  • The White Point
  • Discussion and Conclusions
• Color Part 2: Color Spaces and Color Perception (New: May 23, 2019)
  • Introduction
  • Mixing Light to make Different Colors
  • Color Spaces
  • Color Spaces of TVs and Computer Monitors Maybe Are Not What You Think
  • The Red-Green-Yellow Problem
  • The Black Level Problem
  • The Violet Problem
  • The Bluest Blue
  • Color Perception by Wavelength
  • Discussion and Conclusions
• and more coming