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PDI file submission

PDI image file entries are submitted by e-mail to the Internal Competition Secretary using the:

e-mail address.

Club members having difficulty logging in can contact the webmaster at:

[ As a simple way, click here to launch your e-mail client, primed with the correct PDI secretary e-mail address and an e-mail title prefilled. Please edit the e-mail title to show your division and the correct competition round, prepare and attach your zip file following the instructions below and edit/add the appropriate text explaining what your entries are.

NB: For above link to work, your browser must be configured to launch you standard mail client, and your mail client must also be configured correctly to connect to your chosen mail service servers. ]


1. Preparing your images for PDI entry

(Refer also to the Competition Rules).

PDI images for submission should be saved with a maximum of 1600 pixels in the horizontal dimension and a maximum of 1200 pixels in the vertical dimension. The image should be submitted in JPEG file-format in sRGB colour-space (sRGB IEC61966-2.1), with the colour-profile embedded (there is normally a check-box in your editing software in the Save or Export dialog box to ensure this). It is recommended to save in the highest quality (least compression) from your editing software. There is no limit on file-size.

PLEASE DO NOT : add entry numbers (e.g. 1, 2) in front of your image titles or add your name or initials to the title or leave the camera numbering system in the title.

2. Submitting your images files

The submission must be made by midnight on the Friday preceding each competition.

To submit your images you should:

  1. Place your entry image file(s) into a folder on your computer. The folder name should be your own name in firstname lastname format.
  2. zip up the folder. Refer to links below for how to do this. The zip file name is not important, but it might make sense to also label that file your
  3. Attach the zip file to an e-mail and include useful information to the mail such as which PDI competition round or competition you are entering (and on which date) and whether you want your entries to be considered as Nature entries in readiness for possible Paul Barrow Trophy nomination in the competition at the end of the season.
  4. Send to the Internal Competition Secretary, at


Making a zip in Microsoft Windows XP.

Making a zip in Microsoft Windows 7.

Making a zip in Microsoft Windows 8.

Making a zip in Microsoft Windows 10.

Making a zip in Apple OS X Lion (OS X 10.7).

Making a zip in Apple OS X Mountain Lion (OS X 10.8).

Making a zip in Apple OS X Mavericks (OS X 10.9).

Making a zip in Apple OS X Yosemite (OS X 10.10).

Making a zip in Apple OS X El Capitan (OS X 10.11).

Making a zip in Apple macOS Sierra (OS X 10.12).

Making a zip in Apple macOS High Sierra (OS X 10.13) and macOS Mojave (OS X 10.14).


Some example screenshots with explanations (click to see). NB: You do not need follow the full detail here. These are examples only of how I do it and this example is for PDI images. The only real key thing is that the image files for submission go together in a folder, and that folder has your name, and then you zip that folder up and send it as e-mail attachment to the competition secretary as relevant.

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For Windows and for OS X, there are 3rd party zip utilities also available – for example 7-zip (free, Windows only) or WinZip (paid, Windows and Mac), but we would strongly recommend that unless you know exactly what you are doing, you use the default zip compression methods as found in your native operating system as per above Microsoft or Apple instructions.

Please do not encrypt your zip file (i.e. do not add a password).

If you have any further questions, ask the Internal Competition Secretary.

Also refer the Competition Rules.

Refer to PDI Entries for more general information on colour-spaces and resolutions.


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