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joe-cali.com
is the web site of Joe Cali, Australian photographer, world traveler,
amateur astronomer, adventurer and solar eclipse chaser. NACAA - National Australian Convention of Amateur Astronomers
The following downloads contain a 5-part series of short articles covering all the aspects of that presentation, my slides from the presentation, and an excel file for generating a table of light loss for various combinations of eyepieces and observer ages. Individual files Part 1 The Role of the Exit Pupil and Pupil Dilation in Light Transmission from Telescope to Retina Part 2 The Role of the Exit Pupil and Pupil Dilation in Light Transmission from Telescope to Retina Part 3 Measuring your own Pupil Dilation Part 4 The Slowing of Dark Adaption with Age Part 5 Observational Hygiene Measures Slides from my talk at NACAA 2026 Excel file - "Equivalent aperture table generator" _________________________________________________________ |
| Photography | I
have been taking and making photographs for the past 44 years.
During this time I've hung my work in more than 30 gallery
exhibitions, curated exhibitions, published work in magazines and
taught workshops and given private tuition on a wide variety of photographic topics techniques and
media. GalleriesTravel |
| Nightscape Photography |
I
have been involved in amateur astronomy and astrophotography for the
past 40 years. One of my interests is nightscape photography. In this
section you'll find some links to articles, photos and descriptions of
my Nightscape Photography, Astrophotography and Image Processing
workshops. |
| Solar
eclipses are one of the most spectacular events in nature. I saw my
first total eclipse from central Bolivia 4km above sea level in 1994.
Since then, I've travelled the world chasing these spectacular events. ....more past eclipse chases eclipse expedition plans eclipse primer future eclipses in australia |
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Astronomy |
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