Author Archives: Geoff Shaw

Lens Diffraction – all you ever wanted to know, and a lot more besides.

Posted on June 8, 2023 by Geoff Shaw

You have probably heard of lens diffraction and its effects of softening your images when the lens is set to a small aperture (large f-number). The image above illustrates diffraction effects (Click on the image to see an enlarged image … Continue reading →

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Depth of field – a simulator …

Posted on June 8, 2023 by Geoff Shaw

Here is a useful resource to help you get your head around depth of field and how it changes depending on aperture, focal length, focal distance and sensor format. You can see the effect of changing any of these parameters … Continue reading →

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WCC Creative 2023 Meeting 2, 2023-04-11

Posted on April 14, 2023 by Geoff Shaw

Meeting Notes Link to PPT handout of the meeting notes (only available after the meeting). Homework The homework exercise is to create a “surreal landscape”. I made some suggestions in the presentation but there are so many possibilities, so feel … Continue reading →

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Changing you Lightroom Catalog Backup Location

Posted on March 2, 2023 by Geoff Shaw

It has always struck me as dangerous that Lightroom Catalog Backups are stored in the same location that the active Catalog. If that drive fails (and they do so more often than one expects, see HERE) then you lose both … Continue reading →

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WCC Creative Competition 2023

Posted on February 14, 2023 by Geoff Shaw

Creative competition and Creative SIG Meeting Timetable 2023 Creative image entries due Judging and Creative SIG NOTES Tuesday, 31 January 2023 Tuesday, 14 February 2023  judge: Heather Prince Tuesday, 28 March 2023 Tuesday, 11 April 2023  judge: Brett Ferguson Tuesday, … Continue reading →

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WCC Creative 2023 Meeting 1, 2023-02-14

Posted on February 13, 2023 by Geoff Shaw

Meeting Notes Link to PPT handout of the meeting notes (only available after the meeting). Heather Prince (the Judge for the comp) suggested use of the Harmonization Neural Filter to help blend layers in composites. Here are some links on … Continue reading →

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WCC competition entries

Posted on January 13, 2023 by Geoff Shaw

The rules about what is allowed in your competition entries can be tricky, so this is an attempt to clarify what is and isn’t allowed, and is provided as a guide. The full details are available in the WCC by-laws … Continue reading →

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Macro and close-up photography

Posted on January 10, 2023 by Geoff Shaw

Introduction These notes are meant to be a very brief introduction to Macro and Close-Up photography. There are many books (try your local libraries) that cover this area more comprehensively, as well as many online resources. A few are listed … Continue reading →

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Recolouring Objects in Post Processing Software

Posted on November 1, 2022 by Geoff Shaw

Sometimes you may wish to recolour part of an image. Perhaps turn a black umbrella into a colourful red; perhaps change the colour of a dress; maybe change those red roses into the rare blue variety. Here are some notes … Continue reading →

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G’MIC

Posted on August 24, 2022 by Geoff Shaw

G’MIC, GREYC’s Magic for Image Computing is a full-featured open-source framework for digital image processing. It includes a wealth of image processing filters (about 600 at the time I write this), and is available as a stand alone command line … Continue reading →

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