Sunday, April 20, 2014

Focus, focus, focus


A search for the obvious. Do other landscape images look shaper than your digital images?

Many shooters believe that their images will be sharp because they use a VR vibration reduction lenses. WHOA, its a start but study all Gavin Hardcastle images. He is a professional landscape photographer from Vancouver Island, BC Canada. He teaches photography workshops all over the world and writes extensively about his experiences on location.  suggestions for a Super sharp image.

Vibration Reduction (VR) systems compensate for image blur caused by small, involuntary movements (from unsteady hands, shooting from a moving vehicle, etcs) Known as camera shake. VR can be found in many Nikon products, such as interchangeable lenses for SLR cameras, digital cameras and binoculars. In this article, the principles of VR will be explained by using an interchangeable SLR lens as an example.
Fig. 1 shows how the light from subject (A) reaches focal plane (A’) through the lens. Without camera shake, light from A converges at A’. However, if the camera’s lens moves up or down (ie. camera shake — see arrow) the light from A will converge on A”. This gap results in image blur. The VR System works by adjusting the lens to compensate for camera shake and to make sure light from A converges on A’. Each VR Unit contains a VR lens elements and driving motors to make this happen.

Fig. 1: For the sake of simplicity, this diagram shows only one lens element. In actuality, an interchangeable VR lens has many lens elements.
To compensate for image blur caused by camera shake, the angular velocity (amount of camera shake) should be detected accurately. Two angular velocity sensors are used in the VR System. One detects "pitching" (vertical movement), while the other detects "yawing" (horizontal movement). Diagonal movements are detected by combining the results of both sensors. These sensors detect camera movement as angular velocity every 1/1000 second. Angular velocity data is sent to a microcomputer built right into lens, which then calculates the amount of compensation needed. After this data is transmitted to the VR unit, the adjustments are made instantaneously.

How to Get Super Sharp Landscape Photography Images

The most common question I get asked by my workshop students is ‘how do you get such sharp images?’. It’s actually really simple. Basically, avoid movement of any kind while the shutter is open, focus well and choose the right aperture for your creative vision. Mostly it’s just plain old common sense with a couple of technical elements thrown in, so if you want to learn how to get super sharp landscape photography images, here’s my list of top tips.

Top tips for sharper landscape photography

How to take sharp landscape images - Gavin Hardcastle

1 – Use a good tripod with a sturdy ball head and make sure everything is TIGHT

Seems obvious, but time and time again I see students using decent tripods and they often don’t have everything clamped down tightly. For example, the attachment that is screwed to the underside of your camera should be as tight as you can get it, eventually it’ll work its way loose. Make sure that ball head is completely locked down once you’ve composed your shot.

2 – While taking the shot, don’t place your hands on your tripod

The vibrations of your hands will blur the shot. When that shutter opens, your hands should be nowhere near the camera.
How to get ultra sharp landscape shots - Gavin Hardcastle

3 – Use the 2 second timer or a remote shutter release

This insures that the shutter won’t open until you are completely hands free.

4 – Cheap lenses will defocus while you rotate your circular polarizer

This is another one that seems obvious but I’ve seen it happen a lot. Let’s say you’ve achieved perfect focus on your landscape composition and now you’d like to rotate the polarizer which is attached to your perfectly focused lens. Guess what, as you rotate that filter, the lens is now losing its focus because of the movement and pressure you’re exerting on the filter. This rarely happens with high end lenses but I’ve seen it happen a lot with cheaper kit lenses that are poorly engineered. When this happens simply remember to refocus before hitting the shutter.
How to get tack sharp landscape images Gavin Hardcastle

5 – Enable the mirror lock-up if you have a DLSR

Using mirror lock-up ensures that the mechanical shock induced by the cameras mirror mechanism has dissipated by the time the shutter opens.

6 – Remove your camera strap

In windy situations it will act like a sail and induce vibration.

7 – Add some weight to your tripod’s central column

If the conditions are windy, it will also help reduce vibration.

8 – Place a small but heavy bean bag on your camera and lens

Do this just before taking the shot to further eliminate movement from shutter shock.
How to get very sharp landscape photos - Gavin Hardcastle

9 – Choose a Mid-range to Narrow Aperture

This one should be an article in itself but for now it’s important to understand that if you want corner to corner focus in your landscape images you’ll need to select an aperture that gives you a wide depth of field. Using f/2.8 is pointless, so pick an aperture like f/11 or f/16 depending on how close you are to your foreground subjects. Be aware however that the narrower the aperture (larger number like f/22) the less sharp your image will be due to light diffraction so experiment with your lenses to discover their sweet spot for wide depth of field.
Side Note: Shallow depth of field in landscapes can be beautiful when done well, in which case you’ll need a wide aperture like f/2.8 and ideally a lens that delivers beautiful bokeh – most super wide angle lenses don’t do bokeh well.
How to get really sharp landscape photographs

10 – Focus In the Distance

Don’t focus on the object closest to you. Pick an object in the middle distance that has a clear contrasting line and focus on that. You could focus to infinity but beware that most of the wide angle lenses I’ve used actually focus beyond infinity so I often have to focus to infinity and then carefully rotate the focus wheel back so that it’s just slightly before the ‘infinity’ mark.

11 – Put Your Glasses On

If you need glasses in order to see clearly and focus on things, it should go without saying that you might need to put on your stylish and expensive bifocals in order to achieve clear focus in your photography. Besides, everyone knows that glasses make you look cool and more intelligent, so why not put them on?

12 – Use Live View or EVF magnification

If you have a DLSR with an optical viewfinder I highly recommend that you use your cameras ‘Live View’ mode and then magnify it to your point of interest and use your manual focus ring to achieve sharp focus  If your camera has an EVF (Electronic View Finder)  you can do the same thing while looking in the EVF. I actually prefer this because you don’t get distracted by glare on the LCD or external light sources. Either way, remember to disable auto focus if you decide to focus manually with Live View.
How to get super sharp landscape images
I use every single one of these techniques in my Vancouver Island photo workshops and I teach them to all of my students. If you follow these tips every time you shoot landscapes, you’ll be sure to get much sharper images. If you’ve got some of your own tricks and tips for getting super sharp landscape images please leave a comment below and share your knowledge to me terry@terrydeglau.com.

Now, when you are making sharp images, try to make some urban dance images.

15 Beautiful Urban Dance Images


I love it when a photographer works on shooting a project over time with a similar theme. One photographer I’ve followed lately who does that is Dimitry Roulland who has been working on a great series of photos of dancers and gymnasts in urban settings.






























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