Sharpening RAW files from Small Sensor Cameras

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France, somewhere near Nontes. Sony RX10, ISO125, f/5.0, 1/250"
France, somewhere near Nontes. Sony RX10, ISO125, f/5.0, 1/250″

If you shoot with a small sensor camera and use Lightroom for RAW conversion, then it’s a good idea to take care when sharpening. Noise can be a particular problem when at low ISO settings but there are steps you can take. This video demonstrates how to avoid the ugly sharpening artefacts that can result and which tend to become exaggerated in later processing.

I hope you find this useful.

Friday Image No.101

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Swanage Pier, Dorset.
Swanage Pier, Dorset.

Here’s one for all you fans of Black and White. If you’re wondering what the colour image looked like at the start or the processing I used, it’s all covered in a short You Tube video.

View You Tube Channel

You might find it rather surprising if you haven’t seen it before.

Have a great weekend everyone.


Aperture & Sharpness

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Death Valley. Even for extreme cases such as this three image stitch, f/9.0 was all that was required for full depth of field.
Death Valley. Even for extreme cases such as this three image stitch, f/9.0 was all that was required for full depth of field using th e Panasonic GX1.

At one time I didn’t understand the relationship between aperture & image sharpness. I read many magazine articles and books where Landscape Photographers would commonly say they stopped the lens down to the smallest aperture to ensure the image was sharp from front to back. What I hadn’t realised is that they weren’t discussing image sharpness but depth of field. I also hadn’t realised that many of these photographers were using medium format cameras where depth of field could be a real issue. Fortunately, I now understand this relationship but there continues to be misinformation published on the subject.

Here then are the key points you need to be aware of in relation to depth of field:

  • Depth of field is how much of your image appears to be in focus from the nearest point to the most distant.
  • Depth of field is determined by the aperture you use. If all other variables remain the same, as you make the aperture smaller (larger f/ stop number), you will increase the depth of field.
  • Other factors affecting the depth of field include:
    • Where you place the point of focus – the nearer the camera the shallower the depth of field. It’s also worth remembering that the depth of field will extend twice as far beyond the point of focus as in front of it.
    • The size of the film or the image sensor – the smaller this is, the greater the depth of field at the same aperture.
    • The focal length of the lens can also make the depth of field appear greater – a wide angle lens makes the depth of field appear greater than a long telephoto lens.

When I first started in photography, what I failed to grasp is that the factors determining how sharp an image is are different to depth of field. Let’s take an example where you shoot three images using a typical lens; the first image with the aperture as wide as it will go, the second with the aperture as small as possible and the third with the aperture between the two extremes. If you then review the images looking at the point of focus, you would find that the third image with the aperture at mid-value is the sharpest image. This is because lenses are design to perform at their best when aperture is closed down by a couple of stops. Once you go to the smallest aperture though, the performance and sharpness is compromised by something called diffraction, which makes the image appear soft.

One benefit of using a Micro 43 camera for Landscape work is that you can typically achieve front to back sharpness (depth of field) without needing to stop the lens down to the smallest apertures. In my own work I tend to shoot Landscapes with the lens set to 12mm (24mm equivalent on a full frame camera). The aperture I tend to use is f/7.1 or sometimes f/8.0. Providing you place the point of focus correctly you will have all the depth of field you typically need and the lens will be near to its optimum performance.

Where I use the Sony RX10 which has a smaller 1-inch sensor, I tend to shoot with an aperture of around f/5.6 for full depth of field at 24mm. And when I was shooting with the LX5 compact camera I was using f/3.5 to f/5.0 for full depth of field at 24mm.

I hope this helps all you small sensor Landscaper photographers.

You Tube Video: Nik Color Efex Essential Landsape Filters

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Boats moored on the banks of Derwent Water at sunset, Keswick. Canon EOS300 + Sigma 10-20mm lens.
Boats moored on the banks of Derwent Water at sunset, Keswick. Canon EOS300 + Sigma 10-20mm lens.

For those of you who are Nik users, you might be interested in a new video I uploaded to You Tube. I’ve had a lot of correspondence in the past where people have struggled with how to use Nik Color Efex and why it’s different from Viveza.

Generally speaking, Color Efex is all about adding special effects to your work. But there are also a few of the filters that I think are essential. These can help you improve your photography or correct problems very quickly and I use them regularly with my own work.

This video looks at the first of these filters, which was used to enhance the image above as well as correct a serious colour cast. Even if you don’t currently use Color Efex you might find the video interesting.

View You Tube Channel

Realistic HDR

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Derwent Water, Keswick. Canon 5D MKII. 4 Image sequence merged to HDR with Nik HDR Efex Pro 2.
Derwent Water, Keswick. Canon 5D MKII. 4 Image sequence merged to HDR with Nik HDR Efex Pro 2.

If you read my newsletter on Lenscraft you will know that I’m working on a new book about HDR. You might find this odd if you know me well; following a brief fling with HDR back in 2007 I decided I didn’t like the technique and have been quite vocal about it. As a Landscape Photographer, I find unrealistic techniques make me cringe.

So what’s changed? In short, my understanding and skill with some of the software tools.

The image above which is from one of the worked examples in the book is a case in point. These images were shot on a Canon 5D and at the time I couldn’t tame the dynamic range with filters. I shot the sequence in the hope that one day I would be able to produce a realistic looking HDR image from them.

Well I think that time may be getting closer. The image isn’t yet quite as I would like it but it’s certainly appealing and doesn’t suffer from some of the obvious HDR signs that make me cringe.

And the software used for this? Nik HDR Efex Pro 2 – best of all it’s free.

The trick to making this approach work is to keep the Detail setting to “Realistic” when Tone Mapping. Also set the Depth to “Normal” and Drama to “Deep”. As you process the image be sure to increase contrast selectively as well as darken shadows. Once you have completed the Tone Mapping step it’s worth the image into Viveza where you close the shadows down and apply additional contrast if necessary.

It takes a little practice and feels as though you are engineering the HDR look out of the image. It’s time consuming but I think it’s worth the effort.

The Future of the Blog and Website

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The Hall of Mosses Trail, Hoh Rainforest
The Hall of Mosses Trail, Hoh Rainforest, Olympic National Park, Washington

Last week I posted a blog entry with a suggested mission statement and questions. There are two reasons for this. Firstly, I want to be sure that I am meeting the needs and expectations of you my readers. Secondly, it can be a struggle at times finding interesting material to write about.

Following publication, the post has drawn a lot of very useful feedback both as post comments and direct email. I would like to say a huge thank you to all those people who went to the trouble of contacting me to share your thoughts. This post is my attempt to put some structure around how I will use the blog and website in the future, based on your feedback. I should point out that I may deviate from this at times, but generally you can expect the following:

The Blog

  • The Lightweight Photographer blog will be used to answer the question “what am I doing at the moment”. This can include things that have caught my interest such as a new piece of software or new things I am experimenting with.
  • There will be a mix of equipment based the cameras I am using, probably in the ratio I use them. This means coverage will be skewed to Micro 43 but other equipment will also be featured from time to time. I will include thoughts about accessories such as tripods, filters as well as film, scanning, medium format, compact cameras and full frame. In short, you will hear about what I have been doing with my equipment and what my thoughts are.
  • If there is important news I will share it through the blog.
  • I will cover image processing, especially where I am frustrated with something, where I learn something new or I simply just want to experiment.
  • I will share any tips that cross my mind as I work.
  • I will continue to share examples of my images.

The Website

  • This is where longer tutorials and articles will appear. Material will be both written and video based with a definite emphasis on education/how to. This material is likely to be skewed towards image editing.
  • I will continue to develop Lenscraft as a free resource for photographers.
  • The Lenscraft Creative Store will continue and feature both free and paid products. More products will be added as time allows and this is where I will share my annual Christmas gift for members.

You Tube

  • This is a new channel I would like to develop. It will feature image editing videos as well as “out in the field” video footage.

I hope this sets out the future of the blog and website, providing reassurance of what to expect. My intention now is to focus on some of the answers to the questions I raised.

Once again, thank you.

Help Me to Help You

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North Wales, Olympus EM5. 12-40 lens, 1/400 at f/7.1 and ISO200.
North Wales, Olympus EM5. 12-40 lens, 1/400 at f/7.1 and ISO200.

I have been reading some books about blogging recently and apparently I need a mission statement – okay, let’s go with this for a moment. When I started The Lightweight Photographer blog it was my intention to share information about lightweight cameras as well as information about achieving fast results when editing images. Four years on and I feel I have lost a little bit of focus. In an attempt to address this, I wrote a mission statement.

To create a valuable resource of lightweight photography information and to make this freely available.

And this is where I now need your help. When I sit down to write these blogs, as well as the tutorials on Lenscraft, I am guessing a little about what people want. I am also guessing as to what problems and concerns people have about following a lightweight approach. So…

  • Do you have concerns about the image quality of micro 43 for example?
  • Do you like to print A3 images and wonder if you will be giving up print detail?
  • Are you concerned about noise levels with compact cameras?
  • Do you wonder about the aperture you should use with micro 43 cameras for depth of field?
  • Do you shoot with a Lightweight camera? Why?

I really want to hear about your concerns, thoughts, observations and questions. This will allow me to focus the blog and my website to hopefully respond to some of these points. If it is to do with photography but in particular lightweight cameras and image editing, then I would like to hear.

Please take a moment to let me know your thoughts.

Thank you.