Tip 3 – AI Servo Focus

Sorry, just a short tip this time round…. really busy atm.

I was pm’d about focusing so this is on selecting your AF mode. You will need your camera manual for this one if you don’t know how to change these settings.

Generally when photographing children it is best to use the AI Servo auto focus (I think this is called continous focus for the nikon shooters). In this mode the focus keeps changing with the moving subject while you have your shutter button pressed half way. If you are fortunate enough to have older children or are photographing still life/landscape you could choose One Shot AF but generally I just keep my camera on AI Servo. I only tend to use manual focus when doing macro photography.

Also if your having trouble with focusing, make sure your choose your focal point rather than just using the centre point and recomposing. Look up the selecting AF Point which will be in your Auto Focus section of your manual. Another important aspect of getting good focus is to have a good shutter speed. Usually having a shutter speed of over 125 for short lenses and over 300 for long telephoto lenses. On top of these things it is important to have good exposure.

Sorry so short but hope this is helpful to someone.

Cheers
Andrea

Take your camera off Auto – Aperture Priority

I think the first step to understanding your camera more is to use some of the semi auto modes and get a full understanding of both Aperture and Shutter Speeds and their creative use before going across to manual mode.

 

So, let’s look at aperture.

 

In photography, aperture is the hole or opening through which the light is emitted.  It is used to control the depth of field or the amount of the photo in focus. It is also used to control the exposure together with shutter speed and iso but we will just look at today just from the DOF (depth of Field) point of view.

 

The aperture is the F numbers you see on your camera.  When you choose a small F number (like 2.8) you are choosing a wider aperture or letting in more light as the hole is bigger.  A smaller F number gives a smaller depth of field or amount of the photo in focus while a larger f number like f22 gives lets in less light and gives a much greater dof.

 

To work out what would be in focus in a photo would depend on what F stop you have chosen.  Here is a link to an online dof table http://www.dofmaster.com/doftable.html As you can see, your DOF depends on how far away from your subject (and also the lens you’re using – this table is based on the 50mm on a crop format camera – 400D, 450D, D80 etc etc)

 

So, what does this mean?  Basically if you are wanting to take a picture of your child with a nice blurry background you will want to chose a small F stop number (what is referred to as a wide aperture).  Generally for portrait work with individual people this is often between f2.8 and F4.  Of course when you have got your focussing down pat and if your lens allows, you can open up wider (to 1.2 – 1.8) but your focus plain will be even smaller.  Also remember that generally when you focus the depth of field is approximately 1/3 in front of that point and 2/3 behind the focal point.

 

You will also want your subject a couple of metres or more from the background to have a nice blurry background.  The quality of the background blur (or area out of focus) is referred to as Bokeh.  Better quality lens will give you better quality Bokeh.

 

Also look for distracting elements that may be at the same focal plane as your subject as these items will also be in sharp focus and may be distracting, unless you are doing a more environmental portrait and then a strategically place branch (or something) in the same focal plane as the subject can add a 3 dimensional feel to the image.

 

Okay so enough rambling, here’s my suggestion to help you take your first photos not using auto.

 

1.  Find your camera manual and work out how to put your camera on aperture priority.   Also look at how to change your aperture (which dial to turn) and where on your camera the F stops show.

 

2.  Set you camera on Aperture Priority Mode and choose a F stop of 2.8 or the smallest number you can on your lens (kit lens is 3.5 from memory).

 

3.  Find your subject and position them a few metres from the background (just make sure that there’s not a tree coming out of the top of their head or something like that). Take the photo from the same level as them if you’re taking a picture of a child rather than from above them pointing down (unless that’s the look you’re particularly going for).

 

4.  Now take the same picture using  f 5.6 f8, f11, f16 and f20 for comparison later.  You will notice that the amount of in focus area increases with the larger F stop numbers (stopping down)

 

5.  Now move your subject closer to the background and take the series of photos again

 

6.  Now move them further away and again take the series of photos. 

 

Hopefully you’ll have a better understanding of aperture and its relationship with DOF when you upload and study the photos.

 

Things to note

– Because you are in aperture priority your camera will choose your shutter speed.  Make sure you are taking your photos where there is lots of light otherwise the shutter speed may drop too low and your photos will end up blurry.

 

Happy to answer questions 🙂 🙂

Catchlights

What seems to draw us into a portrait more than anything else is without a doubt the eyes. They are the window of our soul and we want them to sparkle in our photos. So how do you get nice catchlights? Firstly outdoors…

You may want to do this with someone that will stand still for you. Take you subject to some open shade outdoors. This may be under a heavily shaded tree, a pavillion etc but try not to position your subject in dappled light (shade with bits of sunlight floating through). Now firstly turn your subject towards the darkest area (usually to face the trunk) and you will see that their eyes are quite dark. Next, turn your subject towards the brightest source of light (usually the direction of the sun. Have you subject stand 1 – 2 metres from the edge of the shade and look at their eyes. They should go now have some nice light in them. Even the darkest eyes can sparkle like in THIS picture.

You can achieve nice catchlights in lots of different places. on a veranda looking out towards the daylight, under an alfesco area looking out towards the daylight, inside with the subject looking towards a large window or sliding glass door, inside the garage with the door up looking out towards the light, pretty much anywhere where the subject is looking towards a brighter light source then where they are standing. Remember to focus on the eyes and take when setting your exposure, get up closer to your subject so that you aren’t taking in so much of the surronds and set your exposure before moving back and taking your photo.

Again, hope this is of some help

cheers
Andrea