Segunda-feira, 6 de fevereiro de 2023
InícioCâmerasAnálise da Canon PowerShot SD550

Análise da Canon PowerShot SD550

The Canon PowerShot SD550, introduced in August 2005 (only six months after its predecessor), is the most recent model in a long line of ultra-compact ‘ELPH’ or ‘IXUS’ cameras that date back to the early 2000s.

In Europe, the Canon PowerShot SD550 is known as the Digital Ixus 750; in Japan, it is known as the IXY DIGITAL 700. (and a lot farther back than that in the film camera world).

The Canon SD550 is a relatively minor upgrade to the SD500 (Ixus 700) that it replaces; aside from a larger screen (2.5 inches as opposed to 2.0 inches) and a slight redesign of the body and controls, the majority of the changes consist of tweaks to the user interface. The SD550 is compatible with all the same lenses as the SD500 (Ixus 700).

Especificações principais

  • CCD de 7,1 megapixels
  • monitor com amplo ângulo de visão e 2,5 polegadas de TFT colorido
  • 37-111mm (Equiv.) F2.8 – 4.9, zoom ótico 3x
  • Vídeos de 640 × 480 a 30 quadros por segundo
  • Vídeos com taxa de quadros rápida (320 × 240 pixels a 60fps)
  • Clique aqui para imprimir e compartilhar.
  • Balanço de branco individualizado
  • Os métodos de medição incluem pontual, central ponderado e avaliativo.
  • DIGIC II, além do iSAPS
  • AiAF de 9 pontos
  • Nove modos de cena

Canon PowerShot SD550 Design

The Canon marketing staff dubbed the SD500’s design a “Perpetual Curve,” which departed from the boxy aesthetic of earlier IXUS and Elph models. This design was introduced on the SD500 (no straight lines on the body).

The SD550 is nearly identical to its predecessor; however, some of the controls on the back have been rearranged somewhat to accommodate the bigger screen. In addition, the color is now a slightly warmer version of champagne, which is probably something you can’t see from the screen. Still, the color is the other significant outward alteration.

Its smooth stainless steel surface is almost indulgently tactile. It is superbly crafted with admirable attention to detail, as it befits a camera at the top of the ultra-compact price range. The SD550’s appearance and feel radiate quality, much like the SD500 did before.

The drawback of the selected finish is that it appears prone to scuffs and blemishes (so keep it in a case when not in use). I also found the camera to be a touch on the “slippy” side, which meant that I felt a lot safer with the wrist strap in place than without it. But, again, Again, I think this is because of how the camera is designed.

Embora a disposição dos controles tenha sido significativamente modificada (agora existe um seletor de modo em vez de um interruptor, e a maioria dos botões mudou), os fundamentos permanecem os mesmos da maioria dos outros modelos da série.

Isso garante que você possa acessar os controles externos para medição, flash, foco (macro ou infinito) e modo automático/temporizador. Por outro lado, o excelente menu FUNC é utilizado para acessar o restante dos recursos da câmera.

Ao seu alcance

The pebble-smooth shell, along with the lack of any visible ‘grip,’ means that it can seem a bit scary handled in one hand but is, in reality, completely useable. The SD550 weighs around 194 grams when filled, which is just substantial enough to feel solid and sturdy in hand.

A colocação do botão do obturador e do controle de zoom simplifica a operação com uma mão; no entanto, você ainda deve garantir que a alça esteja enrolada em seu pulso se a câmera escapar de seu alcance e começar a se mover na direção errada.

O funcionamento e os controles

Existe uma uniformidade praticamente total nos controles e menus em todas as pequenas faixas de câmeras da Canon, tornando-se um dos aspectos mais agradáveis da revisão de uma câmera compacta da Canon. Cada nova geração é uma evolução e não uma reinvenção completa da roda.

And this is not without good reason; the combination of great external controls and the superb ‘FUNC’ menu, which offers single-screen access to virtually every other aspect of the camera’s operation, makes mastering a PowerShot simple and using it remarkably fluid. In other words, the PowerShot is a very user-friendly camera. But, of course, it is a straightforward camera; it is a “point-and-shoot” type that offers little control over the manual settings.

What you do get, however, is control over the majority of the critical settings, including metering, flash, ISO, white balance, file size and quality, and so on. What you do not receive, however, is any significant control over the apertures and shutter speeds of the camera, except a small selection of subject modes.

Canon PowerShot SD550 Performance

Desempenho e tempo dos eventos

The SD550 gives the impression of being highly quick and responsive in regular usage, which is supported by the results of our testing (note the performance appears to be identical to the SD500).

The SD550 operates well in all aspects, including turning on, zooming, navigating the menus, shooting images, and utilizing the flash. It will very seldom, if ever, make you wait for anything. Unusually for a Canon, the processing speed (thanks to the DIGIC II processor) is almost matched by the focus speed, which is very respectable. It rarely hunts and rarely takes more than half a second to find its mark, even in low light at the long end of the zoom. This is true even when shooting at the most extended end of the zoom.

This is the quickest time we’ve ever seen a Canon small camera focus in our experience. The continuous shooting performance is also quite good for a 7-megapixel ultra-compact camera, as long as you use a fast SD card. The shutter lag, especially when using the optical viewfinder, seems immediate. This is an impressive feature for a camera with such a small sensor size. Excellent.

notas de tempo

Os tempos listados são as médias dos resultados de três procedimentos separados. A menos que especificado de outra forma, todas as temporizações foram realizadas em uma imagem com resolução de 3072 por 2304 pixels usando o formato SuperFine JPEG (aprox. 2.650 KB por imagem). Um cartão SD SanDisk Extreme III de um gigabyte foi usado como meio de teste para esses procedimentos.

AçãoDetalhesTempo, segundos
Energia: Desligado para Gravar 1.0
Power: desligado para jogarImagem exibida1.1
Alimentação: Gravar para desligarToda a atividade cessou1.7
Potência: jogar para desligarWhen the buffer is empty~0.0
revisão de registroImagem exibida~0.5
Modo: gravar para reproduzir 1.6
Modo: Reproduzir para GravarLente já estendida~1.3
Jogar: AmpliarTo total magnification (~10x)~0.8
Reproduzir: Imagem a ImagemTempo para exibir cada imagem salva (sem transição)~0.2
Reproduzir: Imagem a ImagemTempo para exibir cada imagem salva (com efeito de transição)~0.5
Reproduzir: visualização em miniatura3 x 3 miniaturas~0.4
AçãoDetalhesTempo, segundos
Zoom de Wide para Tele37 a 111 mm (3 x)1.3
Atraso de meia pressão (0->S1)Ângulo amplo~0.35
Atraso de meia pressão (0->S1)Telefoto~0.45
Meio a Lag de pressão total (S1->S2)Visualização ao vivo do LCD< 0,1
Meio a Lag de pressão total (S1->S2)Visor< 0,1
Atraso de pressão total (0->S2)Visualização ao vivo LCD, grande angular~0.5
Fora para tiro tomadoVisualização ao vivo do LCD~1.4
tiro a tiroFlash desligado1.4
tiro a tiroFlash ligado (redução de olhos vermelhos desligada)1.8
tiro a tiroFlash ligado (redução de olhos vermelhos desligada)2.7

Modo Contínuo

The findings of our continuous shooting test include the actual frame rate, the maximum number of frames that can be taken, and the amount of time that must pass before another shot may be taken after the maximum number of frames has been taken. A one-gigabyte SanDisk Extreme III SD card was used as the testing medium for these procedures. The shutter speed was maintained throughout these experiments at a value greater than 1/200 of a second.

Modo de condução contínua

The SD550 only has a single continuous shooting mode, and after each frame it captures, it displays a small review image for you to look at. The quoted speed of 2.0 frames per second was found to be utterly accurate by our testing; however, the rate decreases slightly at some lower resolutions for unknown reasons; this may be due to the additional processing overhead incurred when shrinking the file size before creating the JPEG.

Tipo de imagemModomédia quadros
por segundo
Quadros em uma explosão *1Depois de
3072 x 2304 JPEG superfinoContínuo2,1 qpsIlimitadon / D 
3072 x 2304 JPEG finoContínuo2,0 fpsIlimitadon / D 
3072 x 2304 JPEG NormalContínuo2,0 fpsIlimitadon / D 
2592 x 1944 JPEG Super FinoContínuo1,7 qpsIlimitadon / D 
2048 x 1536 JPEG Super FinoContínuo2,0 fpsIlimitadon / D 
1600 x 1200 JPEG Super FinoContínuo1,9 qpsIlimitadon / D 

There is nothing wrong with this camera; not only does it maintain a suitable 2.0 frames per second at most file sizes and quality settings, but the buffering is so fast that you can pretty much shoot indefinitely, even at the highest 7MP/Super Fine setting, as long as you have an SD card that is fast enough.

Ao usar um cartão rápido, não parece viável preencher o buffer, o que significa que você pode continuar tirando fotos enquanto tiver capacidade no cartão e energia na bateria para isso.

Canon PowerShot SD550 Image Quality

Um equilíbrio de branco perfeito

In addition to the camera’s built-in auto white balance, the SD550 features five different white balance settings. These are sunny, cloudy, incandescent, fluorescent, and fluorescent H. You may also set the white balance manually by pointing the camera at a white or gray object and using the ‘custom’ white balance setting. This setting is available as an additional white balance option.

Even if you switch the camera off, it will keep the custom white balance setting that you have previously selected. When usually shooting outside, the auto white balance serves its purpose admirably (as confirmed by our studio tests). Fluorescent illumination doesn’t pose much of an issue indoors, but incandescent (tungsten) lighting produces a relatively strong orange color cast. This is something that we’ve experienced with the majority of Canon PowerShots.

When we asked Canon about its method of determining the white balance, we were told that the warm colors that appear on the camera’s display when it is being used to capture images in incandescent light are deliberate and are done so to “try to keep some of the warm atmospheres of this kind of shot.”

Desempenho em um flash

O flash embutido no SD550 supostamente tem um alcance de trabalho de 0,5 metros a 4,8 metros (1,6 pés a 16,4 pés) na extremidade ampla do zoom e 0,5 metros a 2,8 metros (1,6 pés a 9,8 pés) na extremidade telefoto , tornando-o ligeiramente mais potente do que a maioria dos outros modelos da gama. No modo macro, ele pode focar até cerca de 30 centímetros (cerca de 12 polegadas) (em todos os casos, supondo que o ISO esteja definido como automático).

In the tests we ran in the real world, the flash performed adequately with a minimal warm tone (which is excellent). Even with the red-eye reduction feature activated, the moment has a very short recycle time, ensuring you won’t miss any spontaneous photo opportunities. At the same time, you wait for it to fire. We discovered that the autofocus (AF) illuminator would enable focus in total darkness (or as close to it as possible) at distances of up to approximately one meter.

Foco macro

The macro mode of the SD550 is most effective at the broad end of the zoom, as is the case with most tiny digital cameras. At this end of the zoom range, you can get as near as 5 centimeters, which is not terrible for an “ultra-compact” camera. Even if the performance is less outstanding at the long end of the zoom (with a subject distance of 30 centimeters), it is still rather handy.

Sensibilidade ISO / Níveis de ruído

The ability to raise the sensitivity of the sensor of a digital camera is referred to as the ISO equivalent setting. The function is achieved by increasing the “volume” (gain) of the signal amplifiers contained within the sensor (remember, the sensor is an analog device).

When you magnify the signal, you also boost the noise, and the noise becomes more apparent as the ISO value increases. At greater sensitivities, many of today’s cameras also make use of noise reduction and sometimes even sharpness decrease.

We take a series of pictures of a GretagMacBeth ColorChecker chart to determine the amount of background noise (controlled artificial daylight lighting). The exposure is balanced with the ISO (for example, ISO 200 and 1/200 of a second to maintain exposure uniformity between cameras).

Canon PowerShot SD550 Movie mode

Seria necessário um fabricante ousado hoje em dia para fabricar até mesmo um modelo barato sem um modo de filme fundamental, e a capacidade de gravar filmes está se tornando um componente cada vez mais significativo na decisão de compra de câmeras desse tipo.

The SD550 features a maximum movie size of 640 by 480 pixels, sufficient to fit most television screens when played back at 30 frames per second. This feature has become standard for cameras of this type. Additionally, it allows shooting at a lower frame rate and smaller size. The high frame rate mode can record videos with a 320 by 240 pixels resolution at 60 frames per second.

The videos are pretty smooth and show very few compression artifacts; the only significant issue is that the exposure system is occasionally unable to keep up with the quick changes in scene brightness. The overall quality is good. Unfortunately, the AVI files are enormous; while using the highest quality level (640×480 at 30 frames per second), you will burn around 1.7 MB of data every second. Because of this, if you plan on shooting many movies, you will need to invest in some large and quick SD cards.

Canon PowerShot SD550 Concerns Regarding the Specific Image’s Quality

Em relação à qualidade de imagem, uma câmera ultracompacta como essa inevitavelmente envolveria algum sacrifício por parte do usuário.

The question that needs to be answered is how much of a sacrifice we are willing to make regarding image quality to obtain a genuinely pocket-sized camera. Additionally, the question that needs to be answered is whether or not there is any real advantage to the large 7-megapixel files (over, say, the 4-megapixel SD300) in real terms for everyday use.

Primeiro, a boa notícia: esta é uma Canon e possui todas as características típicas da Canon, incluindo cores exclusivas que são brilhantes e naturais, exposição e foco exatos e um nível muito alto de detalhes (consulte os testes de resolução).

The photographs, particularly those containing delicate low-contrast detail such as foliage, sometimes appear soft or muddy (they are very smooth, almost too ‘polished’). Still, they react well to sharpening and print nicely when they are.

Higher contrast information is displayed cleanly, but bright and contrasty images might create metering issues. Additionally, the relatively high contrast can generate some highlight clipping; still, there is not much to complain about overall with this camera.

Finally, just like with all of Canon’s other compact cameras, we discovered that the so-called “intelligent” AiAF system was the source of so many focus errors (and slow focusing in general) that we would recommend turning it off unless you absolutely cannot use the pre-focus (half-press) lock for off-center subjects. In that case, we would recommend leaving it on.

We noticed that corner softness was a minor issue at the wide end of the zoom range and maximum aperture. Still, it is much better than in prior generations, and it isn’t particularly noticeable in images taken in real-world environments. Purple fringing, a common issue with Canon cameras, presented itself as a challenge for us in many high-contrast photographs.

Ultimately, the SD550 produces the kinds of results that very few people in the target market would find anything to complain about. On the contrary, it would make the ideal ‘always carry’ camera for anyone who is accustomed to using a larger, more sophisticated camera and doesn’t want to sacrifice too much image quality for portability.

In addition, I’d like to point out that the issues described below do not account for more than approximately 5 percent of the about 400 photographs that I took during this test. They are restricted to a relatively narrow range of shooting scenarios except purple fringing.

Canon PowerShot SD550 Coloring along the edges

In almost all of the photographs that feature highly bright (particularly overexposed) sections, there is a traceable amount of purple fringing. In some of the pictures, it is pretty prominent.

Na maioria das situações, não é suficiente estragar as fotos, mas ao fotografar com uma lente grande angular em um dia ensolarado, você pode acabar com franjas extremas nas bordas do quadro onde as áreas claras e escuras se encontram.

Problemas com a exposição e destaques cortados

Clipped or blown-out highlights were not unusual when we used the SD550, just as they were with the SD500 that came before it. These issues occurred most frequently in extremely bright and highly contrasty shooting conditions.

The issue, which is by no means exclusive to this camera, seems to be caused in part by the camera having a reasonably high default contrast setting (which is common in cameras in the ‘lifestyle’ sector of the market because it produces ‘punchy’ prints), and in part, because the metering can sometimes be fooled by scenes that have an extensive range of brightness levels. Neither of these factors is unique to this camera.

Canon PowerShot SD550 Specifications

Material do corpoMetal
Também conhecido como• Nome europeu: Canon IXUS 750
• Nome japonês: Canon IXY Digital 700
Sensor• CCD de 1/1,8″, 7,4 milhões de pixels no total
• 7,1 milhões de pixels efetivos
Tamanhos de imagem• 3072 x 2304
• 2592 x 1944
• 2048 x 1536
• 1600 x 1200
• 640 x 480
Clipes de filme• 640 x 480 a 30/15 fps
• 320 x 240 a 60/30/15 fps
• 160 x 120 a 15 fps
• Até 1 GB (640×480, 320×240, 30/15 fps) (dependendo da velocidade e capacidade do cartão de memória)
• Até 3 minutos (160×120) (dependendo da velocidade e capacidade do cartão de memória)
• Até 1 min (320×240, 60 fps) (dependendo da velocidade e capacidade do cartão de memória)
• AVI (Motion JPEG/mono soundly)
Lente• 37 – 111 mm (equiv. 35 mm) zoom óptico de 3x
• F 2.8 – 4.9
Velocidades do obturador15 – 1/2000 seg
Foco• Foco automático TTL
• AiAF de 9 pontos
• AF de 1 ponto (fixo no centro)
• Modo macro de 5 cm (Wide), 30 cm (Tele)
Modo de disparo• Automático
• manual
• Macro Digital
• Retrato
• Folhagem
• Neve
• Praia
• Fogos de artifício
• Embaixo da agua
• Interior
• Crianças e animais de estimação
• Instantâneo noturno
• Assistente de costura
• Compensação AE -2,0EV a +2,0 EV em passos de 1/3EV
Sensibilidade• Automático
• ISO50,100,200,400
balanço de branco• Automático
• Luz do dia
• Nebuloso
• Tungstênio
• Fluorescente
• Fluorescente H
• Personalizado (manual)
Parâmetros de imagem• Vívido
• Neutro
• Nitidez baixa
• Preto e branco
• Minhas cores (9 configurações)
ContínuoDois fps até o cartão de memória ficar cheio
Instantâneo• Construídas em
• Modos: Automático, ligado, desligado, redução de olhos vermelhos, sincronização lenta, bloqueio de exposição do flash
• Alcance: 0,5 m - 5,0 m (W) / 3,0 m (T)
Armazenar• Cartão de Memória SD
• SD de 32 MB fornecido*
VisorImagem Real Óptica
monitor LCD• LCD TFT de 2,5″
• 115.000 pixels
Conectividade• USB 2.0 de alta velocidade
• Saída A/V
Poder• Bateria recarregável de íons de lítio NB-3L
• Carregador incluído
• (KIT de adaptador CA opcional ACK900)
Na caixa*• Canon PowerShot SD550 Digital ELPH (IXUS 750, IXY DIGITAL 700)
• Munhequeira
• Bateria de íon de lítio
• Cabo AV
• Cabo USB
• Cartão SD de 32 MB
• CD-ROM do software (Canon Digital Camera Solutions e ArcSoft PhotoStudio)
Outras características• Medição pontual (central), ponderada ao centro e avaliativa
• Compatível com PictBridge, Exif Print e DPOF
• Histograma de reprodução
• Sensor de orientação
• Iluminador de foco automático
• Flash opcional de alta potência HF-DC1 (escravo)
• Estojo impermeável opcional
Peso (batt inc)192 g (6,8 onças)
Dimensões90 x 57 x 27 mm (3,5 x 2,2 x 1,1 pol.) Excluindo saliências

Veredicto Final

The SD550 does not significantly advance the state of the art, and given that it was released only six or seven months after its predecessor, the SD500, I would have been shocked if it had done so. However, the SD500 was a small gem of a camera (and the most excellent IXUS / ELPH model to date), and the SD550 is just that little bit better than its predecessor. This is generally positive news. It is one of the few cameras available on the market today that has a true ‘luxury’ feel to it, such as the quality of its build and materials, and the image quality is excellent (for a camera in this class); it is fast, responsive, and reliable, and it is one of the few cameras that can shoot 4K video.

There are still a few image quality issues that pixel peepers will be dissatisfied with, such as the slight corner softness, the purple fringing, and the slightly muddy low contrast detail; however, the smooth, clean, bright, and punchy images will delight the typical user who is more interested in printing their pictures than zooming into them on the screen and looking for problems. The battery life (when using the screen) could still be improved, but other than that, this is a camera that it’s hard not to like and a camera that encourages you to take it everywhere and use the thing. I was disappointed with the new 2.5-inch screen because it has a woefully low resolution (though it’s still lovely to use for those who like to hold the camera at arm’s length), and the battery life (when using the screen) could still be improved.

The SanDisk SD550 is, in a nutshell, the same as the SanDisk SD500 but with a few extra bells and whistles. It is still fairly pricey, and the absence of absolute control is unusual for a product at this level; however, there is certainly enough to put it near the top of the list for anyone looking for a luxury point-and-shooter. Maybe not enough for a Highly Recommended rating, but certainly enough to put it there.

Prós e contras

Bom para
  • The Bottom Line: The Positives
  • Excelente resolução
  • Muito portátil e fácil de transportar no bolso
  • Impressionante em sua estrutura e composta inteiramente de metal
Precisa Melhorar
  • O acabamento é vulnerável a arranhões e arranhões e pode ser escorregadio na mão.
  • Quase não há muito espaço para ajuste manual.
  • There is still no information on exposure at shutter speeds faster than 1/60 of a second.

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