Image Editing

Getting Rid of Those Halos

Often during the post processing of RAW files we experience the problem of edge artifacts or 'halos' as they are commonly known, becoming particularly apparent in the JPEG conversion. Halos may be caused by a number of factors including sharpening, colour, light and contrast adjustments, downsizing for the web and so on. Halos are typically around 1-2 pixels wide and are more discernible on bright monitors which can accentuate contrasting tones or even our club projected images

So whether you think they're important or not, many of our judges think so and home in on 'halos'. As a result I've spent many hours carefully cloning or brushing those pesky pixels into oblivion. However I have good news! Thanks to our own Photoshop guru, David Price (whom I have paraphrased below) there is a quick and simple way of curing the problem:-

Step 1. Complete your processing workflow, save and resize the image to final.

Step 2. Create a layer in Photoshop and change the layer designation from 'normal' to 'darken' in the drop box in the layer window

Step 3. Select the clone stamp tool and set it to around 15 px and 0% hardness.

Step 4. Enlarge the image to 300-400%

Step 5. Position the clone stamp on the background adjacent to the halo, hold down the alt button and click the left mouse button, release then re position the clone stamp over the halo.

Step 6. Left click the mouse button and holding it down drag the clone stamp over the halo and watch it disappear

Step 7. Continue this technique until the halo has been removed or reduced to an acceptable level

Da-Daaaaaa! No halo!

Note: You may need to adjust the opacity down from 100% to fine tune the output.

DoF Calculator, Why we haven't had this facility before now, I ask...

Just for a bit of fun, try clicking on this link Camera Sim but note; it will only work on a laptop. To see it on a mobile device go to

Following on from our Flash Workshop, try another link. This is more complex, but really good! Virtual Lighting Studio ...and this one works on my Android.


A: Ed Gregory: Everything about Lightroom in 15 minutes!

B: Tim Grey: Contrast and Compare: Lightroom CC and Lightroom Classic CC

C: Tony Higginson: Shooting (and processing in Photoshop) a vertical panorama

D: Tony Higginson: An introduction to RAW processing in Photoshop

E: John Adams: Creating a single image Triptych in Lightroom"

F: Gavin Hoey: Creating a single image triptych in Photoshop

G: John Pivko: How to Add Realistic Fog Atmosphere to Your Images

H: Aaron Nace: How to stretch images using Photoshop's Content-Aware Scale tool

I: Adding lightrays to your image using Adobe Photoshop

J: Macro Photography - Using Extension Tubes

A. An Introduction to Lightroom

Now to try out lightroom. If you can stand the pace, this is a brilliant overview of the most popular functions.

B. Lightroom CC or Lightroom Classic CC

Many of us are Lightroom users and Adobe have just brought out their latest version and called it Lightroom CC ...hmmm ...isn't that what we already had? Yes it is, but what we had has now been rebranded Lightroom 'Classic' CC. Tim Grey of Grey Learning explains the confusion in his latest production:

C. Photoshop - Processing a Vertical Panorama

There are literally hundreds of videos available to assist and teach the use of Adobe editing products and I shall just keep putting up examples. Adrian spotted these which feature Tony Higginson. In the first one he is shooting and then post processing a landscape of Loch Assynt using Photoshop. 18 minutes long, but full of good information ...and I do like the finished product!

D. An Introduction to RAW Processing in Photoshop

In this video Tony Higginson explains how to process RAW files of landscapes in Photoshop.

E. Processing a Triptych in Adobe Lightroom

John Adams presents a step by step illustration of how to create a triptych on one image out of three discrete shots.

F. Processing a Triptych in Adobe Photoshop

Gavin Hoey presents a step by step illustration of how to create a triptych on one image out of three discrete shots.

G: Creating a misty atmosphere using Adobe Lightroom

John Pivko explains how to add a realistic fog atmosphere to your images.

H: Stretching an image using Adobe Photoshop's Content-Aware Scale tool

Aaron Nace explains and demonstrates the Content-Aware features.

I: Adding lightrays to your image using Adobe Photoshop

Gavin Hooey again! This time to add light rays to your image using Photoshop.

J: Macro Photography - Using Extension Tubes

Macro Photography - Using Extension Tubes. A Canon based article, but lots of general information

Article on Extension Tubes