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Contents

Introduction


Photography - creative & technical

revised 2017 Jan 30

A question of distance

revised 2010 May 16

RAS 200

revised 2014 Aug 26

Photography


Camera techniques

revised 2016 Feb 14

Digital image structure

revised 2007 Oct 18

A few of my photos

revised 2011 Jan 30

Standard image file formats

revised 2011 Nov 16

Pinhole photography

revised 2017 Jan 5

Astrophotography


Star photography - trails or no trails

revised 2016 Feb 2

Astrophotography with a simple compact camera

revised 2011 Mar 25

Camera following the stars - stacking

revised 2014 Jul 4

Photography through the telescope

revised 2011 Mar 26

Exposure settings for astrophotography

revised 2012 Aug 1

Dark, flat & bias frames - why I don't use them

revised 2015 Oct 26

Photographing the moon

revised 2015 Oct 26

Finding the target

revised 2012 Dec 9

Astrophotographic observations


My latest & best astrophotographs

revised 2016 Feb 22

Astroscapes

revised 2015 Apr 13

The Milky Way

revised 2015 Oct 28

Constellations

revised 2015 Nov 5

Deep sky: star clusters, nebulae & galaxies

revised 2015 Nov 5

Novae & supernovae

revised 2014 Jan 3

Solar System: Sun, Moon, planets, comets, etc

revised 2015 Oct 28

Geocentric or heliocentric?

new 2016 Dec 28

Some mysteries

new 2009 Dec 11

My telescope & camera


Telescope & observatory

revised 2012 Apr 17

Hints & tips for using a SkyWatcher telescope

revised 2011 Mar 22

Go to or not go to

new 2014 Jul 4

Resolution, field of view, etc

revised 2011 Mar 31

My usual astrophotographic process

revised 2015 Oct 26

Using GRIP


Introduction to GRIP

revised 2012 Mar 15

Download & install GRIP

revised 2016 Oct 8

What's new in GRIP

revised 2016 Oct 8

GRIP's main menu

revised 2009 Dec 2

Plotting realistic star charts

revised 2009 Dec 9

The batch menu

revised 2012 Mar 12

Processing steps for astrophotographs

revised 2014 Dec 17

Table of open images

revised 2009 Aug 20

The combination menu

revised 2009 Aug 20

Menus available on each image window

revised 2009 Oct 13

The image menu

revised 2009 Aug 20

The blob menu

revised 2010 Jan 15

The measurement menu

revised 2009 Aug 20

The geometry menu

revised 2009 Aug 20

The levels menu

revised 2009 Nov 19

The convolutions menu

revised 2009 Jul 27

The image help menu


The measurement table menus


Troubleshooting GRIP

revised 2015 Nov 6

How to...


How to subtract photos with GRIP

new 2007 Apr 9

How to open RAW images in GRIP

revised 2007 Apr 10

How to recombine colour channels with GRIP

new 2007 Apr 9

How to measure the diameter of a pinhole

revised 2017 Jan 5

How to estimate unknown magnitudes of stars

revised 2010 Feb 15

Background correction


Panoramas & overlapping photos


Plotting positions of solar system objects

new 2008 Jan 3

Programming with GRIP


Download source code and API

revised 2015 Nov 3

What is Java?

revised 2011 Dec 14

Images in Java

revised 2012 Apr 17

ImFrame class structure

revised 2012 Apr 17

Pixel interpolation

revised 2012 Apr 17

Reading & writing images in Java

revised 2012 Apr 17

TIFF: little- or big-endian?

revised 2011 Nov 23

Image metadata

revised 2012 Apr 17

Blob detection and measurement

new 2011 Nov 23

Minimal GRIP application

revised 2012 Apr 20

Dark-adapted software

revised 2015 May 5

Programming angles

revised 2015 Apr 5

Odds & ends


Why learn to program?

new 2015 Feb 3

Terrain - maps, simulation

revised 2014 Jul 6

The Mandelbrot curve

revised 2015 Sep 15

How these pages were made

revised 2010 Feb 27

Some links

revised 2013 Apr 5

Joyce Loebl Magiscan image analyser

revised 2016 Jan 1