Posts Tagged ‘Resolution’

[Nikon AF-S 70-300mm ED-IF VR] Class resolution – sharpness pure.

[Nikon AF-S 70-300mm ED-IF VR] Class resolution – sharpness pure.

From ghoff

I work with a D300 now and build my lens collection. From the history I still have the 18-200 and the 50 / 1.8. What with the 70-300 I have received is simply top. Immediately compare images in low light conditions recorded. The 70-300 provides amazing. So I just wanted the photos, high resolution (comparable to the 50mm – and wants to read what a zoom), clean images with good contrast and excellent color reproduction over the entire zoom range even at open aperture (according to test reports, the lens on Vollformatsensor at the edge and at open aperture is not as good and therefore has “only 5 stars” instead of “Excellent” received – this does not affect me because I use the DX format in the D300 and have more hits since the verdict “Excellent” too).

In addition, the lens for Nikon, despite its very reasonable price even equivalent processed, no rattles, nothing moves, dust and splash protection. Measure I could not, but my feeling tells me that the VR still works somewhat better than the 18-200. With 300mm and 1/40sek. hot shots from the hand at open aperture – but what is – or? The 18-200 is unfortunately now dead for me, this image I will not renounce. Sorry, but it annoys me when at 100% magnification in the telephoto range everything is blurry, as with many lenses and also the 18-200. This is the sharpness of the lower part OK, but it sings from the resolution of 80mm from the right at 18-200. It is also different, see 70-300.

As previous speakers have said, I confirm. The only weakness I must admit: From 250mm telephoto in the candlelight of Autofouks needs a little time sometimes – but OK, so I can live (I can even use the Einstelllicht – but what the D300 is almost still in the dark without a light sharp relief !) The 70-300mm is already the top right and affordable lens for me.

translated from amazon.de customer review.

Top 20 Questions to consider when buying a digital camera

My first top 20 questions to ask when buying a digital camera.

1. How many megapixels  resolution? Once and for all, at least for me, it is necessary to obtain the highest resolution possible to buy their own currency at the time of purchase. Period.

2. Who has made the goal? Most cameras will give you an idea of where the goal was just looking around the room before the lens. Whether the camera lens had the reputation of a company like Leica, Zeiss, Canon, etc. .. Quality objective is one of the most important factors you should consider especially if you intend to use it for commercial reasons, technical or scientific purposes.

3. Will I need interchangeable lenses? How are they available for my camera specific in mind? Having the option of interchangeable lenses gives you the freedom to experiment with different focal lengths. Although some P & S (point and shoot) DSLR cameras can not compete with a generous zoom for a system of non-interchangeable lenses. It should also be noted the number of lenses available for use with your camera because of the flexibility reasons. You can cover almost all of “zoom” with interchangeable lenses that modest zoom ranges interchangeable lens systems, or S & P cameras.

4. It does not have a zoom capability? What is the scope? Almost all the applications listed above, I need a zoom (telephoto) or outside (wide), especially if you do not have space to move around the object you are shooting . For landscape shots, wide angle shots are very common and on appeal, while the zoom on the details, like a break and the wide angle shots. For weddings and events, you need a zoom, because there will be times when you have little space and time, you will have difficulty moving. It is good to know that you can do all types of shooting, even without leaving your beautiful position.A zoom will give you the efficiency and versatility of your photography, so my suggestion is to go for the longest series can be obtained (usually by a 7X to 10X for Point and shoots). It is also worth noting the speed of zoom in or out it will be a factor if you shoot events like weddings. If you are unable to grasp that “decisive moment” to zoom speed.

5 poor. Available to capture RAW images? Many photographers as you have a digital camera function if you want big prints of your photos. Even if this is correct, the main reason why you want this is because the advantage that you … True full control of your photos … of exposure, color, metadata, and many hdr more.

6. Can I connect an external flash? Have the capacity external flash will give you the power and creative freedom to light the subject so that all you want. You can connect your digital camera to all types of lighting with more options and versatility. This is the form of a hotshoe or a PC-Sync socket. If your camera does not have this function, there is still hope, said flash accessories are sold by partner companies in several flavors that do the same job, more or less.

7. It has a tripod socket? Some of the best photos I’ve seen are certainly done with a tripod, which is a must if you want to do this kind of photography.The plans available light in a marriage, life and product shots still, studio of art and photos … everybody needs a tripod to the success of the performance … so guess what happens when you do not have a tripod? … We can not effectively use a tripod!

8. development manual and automatic? It will not be obvious at first why it is necessary especially if you’re just starting in photography. But if you’re like me … Full control of the “freak” when it comes to cameras … and want to express your creativity is really a must have.

9. You can connect to filters? and what size filter? creative expression through effects is one of the many reasons that makes photography fun and interesting, and testing of filters is a creative exercise, you should try your photography especially if you are a beginner. Remember to always ask if the camera you are considering a digital filter that can process and ask for the filter size. (To save you the right to buy a filter with the filter size problem) Please note that most digital SLR should be able to handle filters for most purposes that are integrated with in the filter thread lens.Most P & S (point and shoot) digital cameras do not usually have a filter thread incorporated in May and need accessories like this, you should check to see sure.Again There are many accessories in May third parties who buy filters to fit your P & S digital cameras do not have this provision. I will discuss this in a future post and to watch. (Or subscribe to my announcement of the list (feed via e-mail), so you will know when it is high.

10. Can I upgrade the firmware? The good thing for some manufacturers of digital cameras is they continue to improve their digital cameras, even after selling it to you … is available as a firmware upgrade. Usually, it is an improvement compared to a or more characteristics of a camera. Make sure your digital camera you are considering buying is a simple way to update its firmware. It is in the form of a simple download via the site manufacturer’s Web (and now preferred) or a warning CDROM.Another FREE – be sure to consider whether a reduction is possible, or even with the digital camera … Why is it necessary to request a drop … Why you May want to reinstall a firmware earlier … just in case you do not like the result of a firmware, it upgrade.Occasionally is a function that is removed from the update that came to bed and it was decided that you want to keep this function instead of a bunch of small updates to the new firmware. (Yes, I have personally experienced.)

11. There are objects or additional software to go with? Some people ignore the fact that you can save a lot of money just to do simple arithmetic. Did you know that you can actually get your digital camera for less when it comes study and the market? If you buy a digital camera comes with software that you can actually use … like photoshop, elements, or any other software for editing images for this issue, has already recorded “the money that would otherwise spend. Some retailers throw many extra … If ask.Always just try to ask these things that you buy at the end, however, if it is not – as bags, extra batteries, extra lenses, memory cards, tripod, cleaning products, etc.. … Believe me you will end up buying these things not to put on the front. What you have to lose, just ask. You think I do not want any of my camera as the acquisition cost of up to 30% Get away.

12. There is a local support in your region? Find answer to that will give you a great advantage over the long term. It would be better not sleep at night because he believes that more security – that if something goes wrong with your digital camera, you can take to have it repaired at a moments notice? Not knowing where the equipment will be repaired (or if he reached a distance of repair facilities) is one of the worst feelings a photographer can have especially if you’re in the middle a photo or project.

13. What kind of warranty? Worldwide / Countrywide? Travel If you know very well that his country or, even better – everyone can not guarantee your camera everywhere. always the warranty card and glue on camera bag.

14. Has the ability to take video and audio, I know, most DSLRs do not have this functionality. However, some lens reflex digital are not interchangeable. It is a very useful feature to have if you are on a project or a photo and want to save a document or procedure, a moment or an idea that would otherwise be recalled problems or even in writing. It is always a good idea to bring a camera to P & S backup function.The what you could do with audio and video on a Photoshoot is limited by your imagination … interviews, documentation, quips funny, procedures training, Bloopers, etc.

15. It has a manual white balance? white balance is one of the most interesting digital cameras. The fun and exciting to work with him. After this option photography fun-o-meter up. In future posts, I white balance will be discussed in detail in order be sure to stay tuned.

16. How is sensitive to infrared? If you plan to make infrared photos or enter the exciting world of infrared photography to art, then you want to know if your digital camera can do. TIP: There is a simple way to test the sensitivity of the digital infrared camera is using a very common – a remote control. For the S & P, you can point the remote at the lens and the shape that the light is low. This should give you an idea of the sensitivity of the IR camera. For DSLRs, you’ll need to take pictures of the LED and test a little “or you can simply search Google or the model camera that you have in mind for other experiences and thoughts on the matter.

17. ISO sensitivity? adjustable manually? ISO sensitivity is a term that refers to the sensitivity of film to light. In the digital world, it refers to the sensitivity of the electronic sensor of your digital camera compared to the standard ISO film.The used for greater sensitivity of the camera faster or better, you can save a specific amount of ISO light.High is useful to take better pictures in the dark … as parameters in a church or in the night. ISO higher, the more you can capture the details of a dark scene. An caution – note the amount of noise this camera at high ISO. Some people and some do not. Again, do not be afraid to ask or do research on the noise characteristics of your model of camera in mind to see if it is the right choice for you.

18. How high or low, you can set the shutterspeed? What are the minimum and maximum opening settings? Shutterspeed settings and opening the fundamental mechanisms that drive the device and controls the amount of light that has been exposed by the film or image sensor. You can use the high shutterspeeds into action to prevent strokes and vibrations of the device, and is used only for shutterspeeds movement and the long or bulb exposures. You can check information on these web sites you have given in the 1st can be seen that the technical specifications for a camera. A bulb or “T” of the function is a feature to have, because you can take risks for virtually very long periods of time. Another feature is that if the device has a remote control for Use of this bulb or “T” mode. This gives you the ability to take pictures without holding the camera and add the camera shake. “With the theme of openness, small (small aperture opening) allows you to have greater depth of field so that the pictures are clear nearly far on a large aperture (open aperture) where your pictures have a depth of field and seem to “selectively concentrated

19. has a form of image stabilization? New cameras how often that character. In short, an image stabilizer is a kind of mechanism built into the lens or the camera (as the manufacturer and their implementation) that basically prevents you from obtaining blurred images when shooting in low light, or if you use a long or telephoto lens. With this function can make the difference between a blurry photo (aka no photo!) a one.

20 usable. How can concentrate in the vicinity? macro skills? more the device can focus the bulk … image of an object that can be taken in relation to the size final image of the pictures … and the image of the object. .. more details, you can get. If you want to take pictures of small objects such as flowers and beautiful details, it ‘ is a must-have.That is everything. Whew.Do is really to go beyond all these issues … Of course not, but even if only to study and reflect on half of them … and take time … I promise you one thing that certainly will … … be very intelligent! when he first began to ask these questions … you are ergo in a better position to decide what to buy a digital camera … Because you are now armed with the most powerful tool anyone can have the power of information! In However, I hope you will find much more value to their own problems, like many of my friends and being able to get the camera in your dreams.Enjoy!

Aldrin Garcia is a Computer Consultant, Professional Photographer and Professional Blogger currently based in the Philippines. Current Projects include a digital imaging consultancy for the 350 page coffee table book “CEBU” and his Photography pursuits at http://www.aldringarcia.com. If you’re starting out as a digital photographer or doing it as a hobby you can check out and subscribe to his blog at http://digicamresource.blogspot.com for more tips, ideas, techniques and musings.

Digital camera resolution base, exposure, focus and storage

ResolutionThe amount of detail a camera can capture is called the resolution, and is measured in pixels. The more pixels a camera, the more it can capture images and the larger one can be without becoming blurry or “grain”. High-end consumer cameras can capture more than 12 million pixels. Some professional cameras support over 16 million pixels (megapixels), or 20 million pixels for large format cameras. For comparison, it was felt that the quality of 35mm film is approximately 20 million pixels. FocusJust in the exhibition and the film, a digital camera is to check the amount of light reaching the sensor. The two elements that you need to do this, the openness and speed, are also present on conventional cameras.

Aperture: The size of the opening of the device. The aperture is automatic in most digital cameras, but some allow manual adjustment to give professionals and amateurs more control over the final image.

Shutter speed: The amount of time that light can pass through the opening. Unlike the film, the light sensor in a digital camera can be reset electronically, so digital cameras have a digital shutter rather than a mechanical shutter. These two aspects work together to capture the amount of light needed to make a good image. In terms of photography, they have the exposure of the sensor.

In addition to controlling the amount of light, the device is to adjust the lenses to control how light is focused on the sensor. In general, the lenses on digital cameras are very similar to conventional camera – some digital cameras can also use conventional lenses. Most of the techniques of auto focus.

The focal length, however, a significant difference between the objective of a digital camera and a 35 mm camera. The focal length is the distance between the lens and the sensor surface. Sensors from different manufacturers vary in size but are generally smaller than a piece of 35mm film. In order to project the image onto a small sensor, the focal length is reduced in the same proportion. Focal length also determines the size, or zoom, when you look into the camera. 35 mm camera, a 50 mm lens gives a matter physics. Increasing the focal length increases the magnification, and objects appear closer. The opposite occurs when the focal length decreases. A zoom is a goal that has an adjustable focal length, and digital cameras have optical zoom or digital – some have both. Some cameras also have the ability to focus macros, which means that the camera can take pictures very close to the matter.

Digital cameras are one of four types of objectives:

1) fixed focus, fixed zoom – These are the types of disposable lenses on the cheap film cameras – inexpensive and great for photos, but fairly limited.

2)-Optical Zoom with Auto Focus – Similar to the camera lens on a video, they are “large” and “TV” options and automatic focus. The camera in May or May not support manual focus. Indeed change the focal length of the lens rather than information that affects the sensor.

3)-digital zoom – With digital zoom, the camera takes pixels from the center of the image sensor and interpolation (change) to make a full-sized image. According to the resolution of the image sensor, this approach can create a blurry or grainy. You can manually do the same with the image processing software – just take a picture, cut out the center and enlarge.

4) Replaceable lens systems – These are similar to the replaceable lenses on a 35mm camera. Some digital cameras can use the lens of the camera 35 mm. Most images storage of digital cameras have an LCD screen so you can see your image now. This is one of the great advantages of a digital camera – you get immediate feedback on what you entered.

Of course, the display of images on the camera, would lose its charm if that’s all I could do. If we want to be able to transfer the image to your computer or sent directly to a printer. There are several ways to do so. Although most devices are now able to connect via serial, parallel, SCSI, USB or FireWire, but typically also use some kind of removable storage device. Digital cameras use a series of storage systems. They are reusable, digital film, and they use a card reader or caddy to transfer data to a computer. Many of the fixed or removable flash memory. Digital camera manufacturers often develop their own flash memory devices, including SmartMedia cards, CompactFlash cards and Memory Stick. Other storage devices removable disks, hard drives (external or Microdrive), and write CDs and DVDs. Whatever the type of use and storage, all lots of digital cameras need space for images. Usually store images in one of two formats – TIFF, which is not, and JPEG, which is compressed. Most use the JPEG file format for storing images, and sometimes the quality settings (such as medium or high).

To get the most out of their space, almost all digital cameras use some sort of additional data compression to make the files smaller. A compression routine uses models that are repeated. The image can be reconstructed exactly as it was recorded, reducing the file size does not exceed 50%, much less often. Another irrelevance routine called compression eliminates some of the best sense, taking into account the fact that digital cameras record more information than the human eye can easily detect.

By Brian Lee

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