Showing posts with label photography. Show all posts
Showing posts with label photography. Show all posts

November 04, 2017

Photography for wargamers – Part 2 – Equipment

Let’s yet again start with a small clarification. When it comes to photography equimpment, two things become apparent as soon as you start dipping your toe in this particular hobby. First and foremost, if you want something better than the basic stuff for snapshots, the price-tag rises rapidly and steeply. Second, the better equipment really does produce better quality images and gives you more flexibility in regard of what kind of images can be taken… if you take time in finding out how to take advantage of its potential.

That being said, even the most basic of today’s cameras are surprisingly capable, especially if you’re don’t bump too hard into their technical limitations. Under normal lighting conditions (always the most important factor), taking snapshots is, as I already said in previous post, a no-brainer! Personally, I’m neither interested in nor able to spend massive amounts of money on cameras, lenses and periphery equipment and my kit is as basic as it gets.

Before we get any further - as it turns out, this post is quite long and meandering all over the place, but arrives to a pretty basic conclusion. If you’re an experienced photographer or don’t have the patience to read through my rantings, please skip straight to the bottom where you’ll find the only really relevant point I’m hoping to express here.

Cameras in general

If we take a quick look at what’s available on the market, I think the cameras can be split into three groups.

  • Mobile phone cameras – pretty much everyone has a mobile phone these days and they’re all equipped with a camera. Quality of those tiny cameras varies widely, but I must say that I am constantly amazed by the capability of one that is built-in in my (by now ancient) Samsung S4 phone.

    Out of necessity, mobile phone cameras are technically limited. The lens is small and they lack much of manual control available in ‘proper’ cameras. Also, they usually save images in compressed format, which limits post-processing possibilities.

    On the other hand, the automatic controls of mobile phone cameras are these days extremly capable and will usually produce a sharp and vivid image of whatever you’re pointing the camera at. I would advise everyone to spend some time experimenting with their mobile phone camera, you may be very surprised by what can be achieved with it.

    Perhaps the most important advantages of mobile phone cameras are of very basic nature. They’re free, you get one when you buy a mobile phone. Also, this is the one camera that you usually have with you! There is a reason for saying that the best camera you’ll ever have is the one that you have with you. Smile

  • Compact cameras – this type of cameras ranges from simple point-and-shoot affairs to some pretty advanced, professional products with very impressive optics and features. Prices vary accordingly. From wargaming perspective, I’d say that a suitable compact camera should have following features:
    • As good optics as you can afford - there is no coming around the fact is that the better optics, the sharper and better pictures you’ll get ‘out of the box’. On a flipside of the coin, keep in mind following – ‘wargames’ pictures are most often intended for the net. For practical reasons, image files for the net need to be small, with obvious consequences for image quality. So if you intend to use your compact camera primarily for wargames and shots of minis, it doesn’t make much sense to spend a lot of money on top of the line products!
    • Shortest focusing distance – try to get a camera with short ‘shortest focusing distance’. Being able to focus on small objects short distance away from the lens is very practical feature for wargamers!
    • Decent zoom capability – being able to zoom on stuff is always useful, but don’t go overboard. Currently, the craze for maximum zoom capability is the ‘next best thing since sliced bread’, but very high zooms are of limited useability if you can’t stabilize the camera, usually by putting it on a tripode. A zoom of x10 is more than enough under most circumstances.
    • Ability to take RAW images – RAW is digital equivalent to film negative of old times. Shooting in RAW gives you a lot of possibilities to adjust the image in post-processing and this feature is pretty much a must if you’re intending to get a bit more serious about photography in general.
    • Small aperture – heads up(!!!), this one is a bit counter-intuitive, because small aperture is represented by large number in ‘f-stop’-variable. But basically, you want a camera where you can make a very small hole in your shutter. Look for maximum number for your f-stops, bigger is better. For now you’ll need to take my word for it – it is important.
    • High ISO range – being able to push ISO sensitivity of camera sensor reduces exposure times and allows for taking sharp images in crappy lighting conditions. Photographers usually wrinkle their nose at high ISO setting, because it impacts image quality… but once again, if image is intended for Facebook or a blog, sharpness is usually more important factor than some color distortion.
    • Tiltable LED display – I’ve learned this one the hard way. The representation of the image your camera will take is shown in two ways – through a traditional view-finder (not necesserily included in compacts these days) or a LED display. Most photographers will rave about necessity for a traditional view-finder. Personally I’d say that for wargaming purposes a good quality, large LED display is much more useable. And it should be tiltable, because we often want to place the camera in small, constrained places and at wierd angles. Being able to tilt the display and see what image will show is very useful in these situations.
    • Small footprint – once again, constrained places and wierd angles. Small cameras are easier to handle.

  • DSLR cameras – DSLR stands for Digital Single Lens Reflex and DSLR cameras are the ‘big wigs’ among cameras. They consist of a camera body and wide range of exchangeable lenses, often designed for a specific type of photography. DSLR cameras take (at least in theory) best pictures and offer most flexibility for the photographer. They’re also expensive, bulky as hell and have the steepest learning curve if you want to use them to their full potential.

    If you think of picking up a DSLR camera, you actually have two decisions to make. The first consists of the choice of camera house. This is a serious commitment, because camera houses are expensive. More importantly, you bind yourself to a specific brand.

    Your decision should be based on two consideration – what producer and how advanced the camera-house is to be. From technical perspective, I’d say that the considerations are the same as for a compact camera. As for the producer, you have couple to choose from – Canon, Nikon, Sony and Pentax are some of the biggest names on the market. All make excellent products. While prices for different types of camera houses (entry level, enthusiast and professional) are pretty much the same regardless of producer, there can be relevant differences in performance of inner electronics, advanced features and layout of the camera interfaces (buttons and software). This last factor can be of particular importance, so try stuff out at your local dealer before you commit.

    Choice of lenses is as important aspect as the camera house if you decide to pick up a DSLR for your wargaming photography. When you buy a DLSR camera, you’ll usually get a so called stock lens. Let’s put it straight – stock lenses are usually crap and of lowest available quality when it comes to optics quality. They will do to start with, but sooner or later you will probably want to upgrade to something better and more flexible.

    The range of choices when it comes to lenses is mind-boggling, but basically you have two types of lenses for DSLR:
    • prime lenses – these lenses have a preset, non-adjustable focal length, measured in mm. Lenses with short focal lenght are used to take images with wide angle or close-ups. Lenses with long focal lenght are used to take images with ‘small’ angle and at longer distances. Advantages of prime lenses are that since they are simpler to construct (less moving parts and less complex optics) they tend to be cheaper and able to produce really good pictures. The drawback is that since you can’t zoom with a prime lens, you need to place your camera in ‘right’ place och change the physical lens between shots.
    • zoom lenses – these lenses allow you to zoom on the image subject and are therefore much more practical. There are two types of zooms – normal and tele. Normal zooms can vary between 10-20mm and 50-100mm. This gives you good flexibility at distances between below a meter and maybe 10-15 meters. Telezooms are used for long distance photography, but are also very useful if you want to zoom on couple of 6mm minis from 5-6 meters away.

Here’s the thing about lenses – personally I am yet to find optimal choice when it comes to good lens for wargamers. I won’t go into details right now, but there is a couple of very specific and conflicting aspects when it comes to wargaming that make choice of optimal lens a bit of a challenge.

Other equipment

Beside the camera itself, unless we’re talking about mobile phone cameras, I’d consider a good tripode with adjustable mounting head the most useful addition to your photography kit. Tripods come in different sizes. A table tripod like a Joby is very practical for small cameras. Full-size tripode is bulky, but is indispensable if you want to take sharp photos, especially when long exposure times are necessary.

One piece of equipment I’m very divided about are camera flashes. Every camera has one built in. They’re usually crap, for a multitude of reasons. First and foremost, photos taken with built in flash are pretty much always washed-out and flat, because the light ‘floods’ the subject. Second, the range of a built in flash is usually very limited. This means that a couple of meters directly in front of the lens is properly illuminated and the rest of the image is significantly darker. There are ways to control first of these undesireable effects, but you can’t do much about the second. Thus, if I can avoid it, I don’t use built in flashes. This limitation is especially important in my opinion in regard of compact cameras.

On the other hand, I am currently seriously considering getting proper flash light for my Canon DSLR. External flash lights for DSLR are extremly powerful and with long range. They have no problem with properly illuminating a medium sized room. The trick is to learn how to control the light they’re making, so you don’t get these washed out images I mentioned above.

My own stuff

IMG_0067

Here’s what I use these days:

  • Camera in my Samsung S4 mobile phone. Up ‘til now, I’ve mostly used it when I wanted to take a quick snapshot of something close up or didn’t want to fiddle with adjusting the images afterward. However, over last couple of days I’ve done some more in-depth tests with this camera and I must say that I am mightily impressed by its capabilities. I may very well have underestimated its useability up ‘til now!

  • Panasonic Lumix LX-7. I fell in love with this little compact camera as soon as I saw its specifications. At the time, I was under the impression that the most important factor was wide aperture, usually a quite expensive feature in camera optics. This little thing is capable of f1.8 at its shortest focal length (that’s when you take ‘wide’ images) and it blew my mind at the time. These days I’m of the opinion that wide aperture isn’t as important as I have once believed. Nevertheless, I still think this little camera is very useful for wargaming photograpy. It takes sharp images and is capable of focusing at very close ranges. It is however limited by crappy build-in flash, limited zoom (3.5x) and, ironically, limited smallest aperture (f8.0).

  • Canon 1200D DSLR camera. The ‘big gun’ in my arsenal and under right conditions a very capable beast. This model is an ‘entry level’ DSLR camera from Canon, but it’s very good piece of equipment. But it’s not the easiest camera to use and on a bad day I can be quite frustrated by a galore of blurry images it delivers to me after a gaming session. After having it for a couple of years, I am still learning how to use it properly. At times it can be as frustrating as a baby crying its head off for no apparent reason. But, as long as I pay it the time and attention it requires, it is also the most fun camera I’ve ever had.

    My DSLR has usually a cheap Tamron telezoom mounted on it. I’m pretty sure that it is one of root causes of these less than perfect pictures I’m sometimes getting out of this rig. It turned out to be less than optimal choice for wargame photography, but it was cheap and it has a wide zoom capability. It has to do for now.

    My other lens (beside the stock lens that followed with the camera and which I never use) is a Canon 50mm prime lens. This little puppy is as cheap as it gets and delivers shockingly sharp images. It is also totally unuseable for wargaming purposes. Its minimum focus distance is not short enough to allow for useable closeups and it requires too much distance between the camera and the table for good wide angle shots. I love this little lens to bits as long as we’re talking normal photography (portraits and street), but it’s useless for wargames.

Additional comments

One thing that is perhaps worth mentioning are compact system cameras, which is a hybrid between a compact camera and a proper DSLR camera. They’re usually very capable, advanced products with all the features of a DSLR, but in smaller package and sometimes with single, permanently mounted zoom lens. Since I don’t own one, I have no experience of this type of camera. And so, I skipped over it in my post. However, compact system cameras may very well be optimal choice for a wargamer who wants to have some fun and be able do a bit more with his kit.

Another thing that I would like to touch upon are ‘current trends’ in photography equipment. Some ten years ago, the craze was all about megapixels, the more the better. Of course that’s not the case, but it was an easily defineable ‘good, better, best’ factor when marketing a camera. Number of pixels is basically number of dots that can read light and color in a sensor. The ‘gut feeling’ may suggest that more dots equals sharper images and that’s correct assumption… under some very specific and for wargaming purposes irrelevant circumstances. Where ‘megapixels’ or resolution comes into the picture (no pun intended) is when pictures are printed on paper – large size prints do require high image resolution to look good. And by ‘large print’ I mean poster size pictures! For standard prints a 10 megapixel sensor is more than enough. For web photos on a blog or Facebook you can probably use 3 megapixel camera and not see any difference.

Today, the craze is about extreme zoom capability. This in itself can be very useful for wargamer, but keep two things in mind. First of all, pushing zoom lenses to the extreme does come at a price and you pay it with reduction of image quality. Also, the more zoom is used, the more sensitive the camera becomes to vibrations. If you think you can zoom your camera to those 30x while holding it in your hand, you’ll in for a surprise when you see the image you’ve taken. So, if you intend to play with extreme zooms, get a tripode and save yourself a lot of frustration.

Final thoughts

Allright, so that’s the ‘rant’ about equipment, Hopefully I had something useful to tell you, but in the end it all boils down to this single piece of advice I can give to anyone thinking about investing in equipment to take ‘better  pictures’ – advanced and expensive kit doesn’t automatically equal better pictures. Cameras are precision tools and just like any other tool, the more advanced it is, the more expertise and dedication it requires to get most out of it. If you’re ‘just’ interested in taking some snapshots and aren’t interested in investing time and effort in learning about photography, then there is really no point in investing in more advanced gear. Buy stuff that fits your needs, aspirations and your level of interest in photography and don’t expect miracles first time you use that shiny new DSLR. Smile

October 29, 2017

Photography for wargamers – Part 1 - The rant and The Theory

Bet some of you are thinking “Photography for wargamers, eh? Quite pretentious of you, laddie,  considering the quality of some of the pictures on your blog! Also, hadn’t that done been before?!”.

Well, sure… but it hadn’t been done by me yet and considering how frequency of my wargaming activities have decreased to another low watermark, I do what I have to do to keep this blog alive. Smile

Seriously though… I’ve been toying with the idea of writing a couple of posts about this topic for quite a while. You see, wargaming is what actually got me into photography in the first place and the specific challenges of taking photos of wargames is what shaped my ‘development’ in photography department. Along the way, I’ve made (and keep making) a lot of mistakes, but I’ve also learned a couple of things while having a blast with cameras (most of the time). So, if I can help somebody to avoid some of the pitfalls I’ve encountered and maybe tell something informative about this particular aspect of our hobby, I’ll consider it effort well spent.

Before we continue, couple of usual disclaimers. First and foremost, I am not an expert of any kind, so keep that in mind. I may be mistaken in my definitions, terms or explanations. Second – once we get so far and if I at any time describe some technique – it may work for me, but doesn’t necessarily have to work for you. As always on this blog, YMMV principle is in effect!

Allright, let’s get on with it then. I will approach this subject from an absolute beginner’s perspective, so let’s start off with the basics of photography and digital cameras.

Basic principles

What a photo camera does is really pretty simple – it’s a dark box with a sensor of some kind that catches light and registers it on some type of medium. In old days, it was a film coated with light sensitive chemicals. These days, photography has become digital affair and the light is caught by a light sensitive sensor, transferred into zeros and ones and stored on a memory card.

From a photographer’s perspective, there are two factors that need to be controlled – how much light to allow into the camera and for how long to catch the light. Both these factors are controlled by something called the shutter. Shutter is the “gate”, located either in the camera itself or in the lens, that separates the outside world from the light-sensitive sensor. When you make a photo, this gate opens to a certain degree and for certain amount of time.

Lenses with different apetures

Aperture is the term used for the hole that appears when the shutter is opened. Aperture is the first of thee fundamental factors in digital photography. In the picture above you can see different apertures for a specific lens. The shutter opens in pre-defined incremental steps, called f-stops. The lower the number of the f-stop, the bigger the hole.

The aperture controls one thing – how much light is allowed into the camera to be registered by the sensor. In simplest possible terms, the bigger the hole, the more light is let in. This reduces the time needed for the sensor to register the image. But that’s just the part of the truth; size of aperture affects the image in other ways. We’ll get to it in a while.

Shutter speed is term used to describe the amount of time that the shutter is opened to allow the light into the camera. It’s the second of the factors that you need to decide upon whenever you take a picture. The longer the shutter is opened, the more time you allow for the sensor to register the light. The relation between aperture and shutter speed is simple – the smaller the opening, the more time your sensor will need to register adequate amount of light.

In picture above the f/1.8 opens the shutter wide open. This usually means that you can keep your shutter opened for very short while, usually a miniscule fraction of a second. On the other hand f/11 aperture barely opens the shutter. This makes it necessary to keep it opened for significantly longer time, sometimes several seconds.

ISO is the third and final factor that needs to be controled when taking pictures. Unlike aperture – the size of a hole in your camera – and shutter speed – the time the hole is opened – ISO is a bit more abstract in its nature. Basically, it’s the setting that controls the sensitivity of sensor in your camera to the light. ISO typically starts somewhere around 100 and goes up in predefined increments up to its maximum sensitivity setting. The higher the ISO setting, the more sensitive your camera sensor becomes.

Exposure Triangle

These three factors are directly related to each other. Together they form so called exposure triangle. Put these three together and here’s what you get:

  • Shutter speed – the shorter the shutter speed, the bigger aperture needs to be and/or the more sensitive your ISO settings needs to be. The longer your shutter speed is, the more you can reduce your aperture and reduce ISO sensitivity of your sensor.
  • Aperture – the wider aperture (smaller f-stop number), the shorter time is required for your shutter to be opened and/or your ISO sensitivity needs to be. Small aperture requires for your shutter to be opened for longer time  and/or  your ISO needs to be increased.
  • ISO setting – low ISO setting will increase the amount of time your shutter is opened and/or  for your aperture to be set to ‘bigger hole’.

Zero sum game

Pretty simple, eh? But what does it have to do with anything? Well, consider for a moment the most common problems with photos:

  1. They are either too dark or to bleak.
  2. Photos are blurry.
  3. Only part of the photo is in focus.
  4. There is a lot of strange inaccuracies, like small spots, all over the image.

Problem no. 1 is caused by either too little or too much light hitting your sensor.

Too much light will result an ‘overexposed’ image – the sensor will be overloaded with the light and register either too much light or, even worse, reach to its maximum sensitivity, resulting in homogenous blobs of color without any detail.

The opposite happens when too little light reaches the sensor. That’s caused by too short shutter speed, to small aperture (too high f-stop for selected shutter speed) or too low ISO sensitivity for selected shutter speed/aperture combination.

When a photo is ‘good’, the shutter speed is adjusted to right time for your ‘opened hole’ (aperture) and current setting for light sensitivity for the sensor in the camera.

Problem no. 2 is easier to explain – your shutter time is so long that your hand shakings or vibrations disturb the camera to such degree that its movement is registered in the image. Some folks have a so called ‘steady hand’, personally I seem to have a hand of an alcoholic in the middle of withdrawal. Any shutter speed above 1/250 of a second will result in blurry image if I hold the camera!

To counter this problem, increase the aperture (lower f-stop number) or increase ISO setting.

Problem no. 3 can be caused by your camera focusing on wrong spot. More probably though, your field of depth  is too short. What’s field of depth, you ask? Well, it’s the distance from your initial focus point that remains sharp and in focus. Consider your own eye. When you read, you see clearly the text you focus on and maybe a bit around it. Rest of the page is ‘out of focus’. Depth of field in a camera works the same way. And it’s controlled by your aperture – the bigger the hole (smaller f-stop number), the smaller amount of image will be in perfect focus!

I’ll be talking about field of depth a lot more later on, so ponder the consequences of this behavior for a second and let’s move on.

Finally, problem 4. Daddy of this one is your ISO setting. Basically, the more sensitive your sensor becomes (higher ISO setting) the crappier it becomes at understanding what colors look like.

Conclusion

If we put things together, here’s what you get. Perfect picture is correctly exposed, with sharp focus on stuff we want to take a photo of and with correct reproduction of colors. Easiest way to get a sharp photo is to keep shutter speed as low as possible. But that demands that aperture is wide open and that reduces the distance in which things are sharp and in focus. Quite often, the physical limitations of the camera lens itself can be the limiting factor – its shutter cannot be opened wide enough and we need to accept longer shutter speed than we’d wish for. Of course, we could increase the ISO sensitivity of the sensor. But that may make the photo grainy and (worst case scenario) covered with mis-colored dots.

OK, so let’s keep the ‘hole’ small. This will increase shutter speed, resulting in blury photos. Fine then, let’s push ISO to the maximum settings… oh damn, these mis-colored dots are there again!

So… you now think ‘Is he saying that there is no way to take a good picture?’. Well, kind of… actually, taking a good picture under good lighting conditions can be a no-brainer. But it’s when things aren’t working so great in the lighting department that it can be quite valuable to be able to figure out what causes the problem and maybe figure out a work-around.

But we get there in next installment of this series.