vent youth
now almost all cameras offer the ability to save photos in the classic format is jpg or in raw but what is the difference?
The jpg is a compressed format to save the images so that they occupy little space and is born when the memory available to users were small and expensive.
The raw is an uncompressed format that takes up much space but offers many advantages over jpg.
Firstly, it should be clear what is meant by compression of a file that could be confused with the zip-compressed files for example.
jpg When we talk about is how we speak mp3 music, both are files that take up little space, but to achieve this have to lose information.
To be more clear I do the example of a camera with 10 megapixel sensor, the raw file of this machine is great about 18Mb and the same photo in jpg will have a weight of about 5Mb . As you can see the difference is huge and all that is missing is information that was lost that can not be retrieved later.
Personally I choose depending on the size of the photo shoot, for photos that do not interest me much, those made without pretensions or just a memory I choose to have quietly while the jpg for pictures or for important pictures shooting in raw only. The reason is simple, are derived from a raw file and much more information can be recovered much more photos, you can go for example to retrieve a wrong white balance or adjust lights and shadows with precision.
The downside is that the same memory card shooting in RAW I can not save many photos but let's be honest, when we go out and we have 400 shots are already too plentiful.
To make a parallel with the analog raw as we could see the film negatives and prints as a jpg.
One thing to consider is that the raw format is not natively supported by the pc, however, be converted in jpg, slowly but are solving this problem in the computer is hard to abandon one in favor of a standard more. Bear in mind that shooting in RAW will fill your hard drive very quickly and it is advised to take into account buy an external images only to be lighter on your computer. I for example, when shooting in raw end of the day I find myself with 4-5Giga of photographs, I find myself once a month and the laptop's hard disk so I had full armarmi external disk large capacity and also much more reliable as a long life .
As always, these are personal choices, evaluated and then proceed as you like because the raw is not vital, just as well you shoot in jpg and not normally notice the differences between the two formats.
In a previous speech I talked about the brightness of the objectives and the F number that indicates we are using the diaphragm. To summarize in a few words f indicates the aperture, the smaller the number, and more light will pass by allowing a gap between the foreground and background.
Here are some shots that I did and I think that explains everything better than a thousand words, the order of the aperture used is as follows: f2-f4-f5.6-f8-f11-f16-f22. As you will notice that the number will grow to change the image, what is said is that as the number f also increases the exposure time because less light passing through the goal we must increase the time of installation, then you must use a tripod if available light is low.
f2
f4
f5.6
f8
f11
f16
f22
As you can see the blur varies greatly between a light and a dark lens, be aware that targets low-end usually start from f3.5-f4 and then you can understand that with these lenses can do many things but not, for example portraits that highlight the face and not the rest unless you work in the studio with the appropriate backgrounds. The downside is that the bright lenses are expensive and therefore should be evaluated well spending in relation to the future use. Another issue to consider is that the lower the f-number the greater the chance to miss the focus, instead of the flower if there was a face with f2 I can focus the eye lashes and do not degrade the picture, so to speak .
Another thing to keep in mind is that most of the objectives to make the most of f5.6 in the sense that this value the lens aperture can resolve details as to the best values \u200b\u200blower or higher tends to lose a bit of punch, but this is a general discussion because there are lenses that do not suffer from this problem like the one I used for these shots.
What is the stabilizer image? The question may seem trivial but in fact many believe that the stabilizer in some way to prevent blurring due to subject centered and instead just goes to prevent small fluctuations due to the hand of those who are photographing.
There are two types of image stabilizer, or on the lens or camera body, which is better between the two?
I personally think that at the final result is equivalent, but I find the fact of having the image stabilizer in the camera body will bring many benefits, let's see some. A body-stabilized makes any stabilized lens you mount on the lens and allows you to have lighter and less expensive than those which incorporate the stabilizer. For example, if you buy a Canon or Nikon and go see their telephoto lenses you'll find that on average larger, more expensive and heavier than the equivalent focal length covered by such optical Sony, Olympus or Pentax mount because the latter makes the image stabilizer in the body.
The stabilizer has benefits in two cases, the first is whether we are using telephoto lenses with which even small fluctuations are amplified in our hand and the second when we photograph low light because the stabilizer is designed to increase the shutter speed without needing to go with the iso.
Surely you can not live without stabilizer, but also because it lacks a convenience that allows you to take home a lot more photos and many more situations?
The downside of this feature is the battery consumption that rises enough so it is better to switch off when not in use, there is usually a menu or a button dedicated to this. Please note that with the wide-angle lens in good light your shutter speed should be such to render unnecessary the stabilizer and then you can keep it off.
One thing to remember is to always turn it off if you use a tripod! Yes, because if the stabilizer is useful in your hand can do the exact opposite on a stable, why? Simply because the gyro stabilizer move thousands of times per second and if built on a solid base of generated micro moved that it can not compensate for their Essendon cause.
to photograph wild animals in the first place you need a good canvas, from 300mm up, you need both light and is stabilized either he or the camera. Without these things you can hardly take home a satisfactory picture.
Wild animals are wary and easily frightened so you have to photograph them from a distance unless you are accustomed to human presence so you must always remember to move in silence, even if you are several people otherwise flee before they can see them. A typical example is the deer, they have very sensitive hearing and sense the approach you since you are away so if want to photograph you have two choices, move quickly and quietly lurking and trying to cross them or wait until it passes close but you need to know the paths that normally fight.
Pay attention to scents, aftershave and deodorant to have strong smells and wild animals and hear them stay away.
Always try to go out on sunny days because the time of the shot must be very fast and if you must manually set the ISO on medium to high in low light so you always have a short time. This arrangement will also allow you to avoid the micro-shake blur due to your focal length lenses that push will be greatly magnified.
when I go into the woods I carry the bare minimum level of equipment, usually only have the camera with a telephoto lens on, a spare battery and a cloth to clean the lens, everything else is only useless encumbrance that in addition to slow the march also risks making unnecessary noise.
A detail often overlooked, which affects more males pee a lot ... maybe being in the woods and having put themselves need to pee freely ... not There is nothing wrong of course but the animals use urine to mark territory and go pee means to signal their intrusion in any animal in passing that he will stay well away from us or path we have embarked.
About paths avoid those beautiful wide and busy, with some birds have little chance to breed wild animals, then choose those small, barely visible because they probably are those used by their deer or wild boar when they move. Look at the ground while walking, the droppings are always good signs in the area to see if there something or not to photograph and observe on the ground even though there is evidence for example of a small excavation because the wild boar can also do some good holes in search of food.
to the photograph and will consider the light I suggest you also set the exposure on the single focal point as the focus, thus avoid photos where the subject may be exposed to evil maybe losing a potentially good shot.
not take along food, which is spread to attract animals, nature photos must be such, you can do in the parks to attract sparrows and robins but in a forest would only make the picture unnatural.
like walking, this is essential, do not go in the woods if you do not like to walk for hours up and down the trails and do not bring back the whining, the nature photos, or do it alone or in a well-knit group that knows how to move and get what he wants. If you carry someone who just wanted to make a picnic in a meadow you'll probably make a snack or complain constantly making you miss the "prey".
Photo hunt is carried out exactly as hunting guns with the difference that the animals instead of killing them unnecessarily you photograph, what I believe far more noble and worthy of note.
What focal length to use for portraits?
depends ... because every focal length brings with it the peculiarities in the portraits that are subject to change.
gendangolare If we use for the portrait, put a 28mm or not, we come very close to the subject to have a close and the lens will distort the facial features
A short telephoto, say the 100mm is usually the ideal focal length for portraits because it produces special geometric deformations in the face of the subject and allow to stand at a distance that allows the person to relax more not feeling too heavily the presence of the target.
You should also keep in mind that the longer the focal length used, the higher you get the separation between subject and background and this, together with bright lenses, allows for a lot of fuzzy beautiful.
About brightness of the lens you have to be a bit 'careful, slow, light type f 2 or less, so make a blurry but you may get more easily out of focus areas on the face of the subject, for example, you have to focus their eyes, and the tip of the nose!
For some this is a virtue, I find it a fault because if I want a portrait that is readable to the entire face but it is a subjective matter exactly as I hate the portraits that are all the rage now with the heads cut off, simply do not like them.
Fundamentals in a portrait is the eyes, those MUST be Focus then when you do this kind of shot they make sure to focus on the point of focus.
The reason? Simply because they are the most expressive part of the face, eyes the people speak, his eyes tell who they are then to those who see the photos.
When making portraits, even people who know each other, it is essential to establish a relationship, talk about, because otherwise the person to relax in front of a car is easy to do the "faces" and be unnatural.
This is one of the reasons why you should choose the long lenses, not to stay on the subject and allowing it to relax.
With children, everything is more complicated, usually move and then agitate the perfect shot is difficult and you should run a lot and then skim the best ones because the risk is very high and rough micro maybe those shots that seemed to have succeeded in reality are not. The best thing is to make them play a bit 'with the camera, let him review some pictures so you get used to that gun that's been focusing on him and not be intimidated otherwise you will have few opportunities to make some candid shots because the kids or hide or to get started "posing".
Beware also the lights, the portraits are key to highlight the details or hide them, if for example you have before you a young girl to avoid the gray areas and ensure that the light is soft, never a direct flash because it would accentuate the imperfections of the skin. Conversely, if the person is elderly and has many wrinkles and want to enhance this particular to give it much importance then you have to work on the shadows to bring out the grooves on the face data from wrinkles.
Even the camera angle is important, a thin person has no problem of double chin and you can pick any in the filming from the bottom up but if a person a bit 'in How about meat no doubt look down would accentuate the double chin! Hence for such people will be preferred portraits made by a raised dot, like standing on a stool, so that the subject raise head slightly, making the small imperfections less noticeable.
| Sensor Type | Width | Height | Format |
|---|---|---|---|
| 1 / 3, 6 " | 4mm | 3mm | 4 / 3 |
| 1 / 3, 2" | 4.536 mm | 3,416mm | 4/3 |
| 1/3” | 4,8mm | 3,6mm | 4/3 |
| 1/2,7" | 5,371mm | 4,035mm | 4/3 |
| 1/2,5" | 5,76mm | 4,29mm | 4/3 |
| 1/2" | 6,4mm | 4,8mm | 4/3 |
| 1/8" | 7,167mm | 5,319mm | 4/3 |
| 1/1,7" | 7,6mm | 5,7mm | 4/3 |
| 2/3” | 8,8mm | 6,6mm | 4/3 |
| 1" | 12,8mm | 9,6mm | 4/3 |
| 4/3" | 18mm | 13,5mm | 4/3 |
| Canon APS-C | 22,2mm | 14,8mm | 3/2 |
| Nikon DX - Sony APS-C | 23,7mm | 15,7mm | 3/2 |
| Canon APS-H | 28,7mm | 19,1mm | 3/2 |
| 35mm Film / Full Frame | 36mm | 24mm | 3 / 2 |