Wednesday December 22 2010 (This review has been prepared with Focus Numérique, a French photo news website)
Owning a 50mm lens is probably a must for any photographer. These primes are ideal for many good reasons. Mounted on a full-frame body, they provide a neutral field of view. Not a wide-angle, and not yet a telephoto lens, it is said to be close to human vision. On wide sensors, a 50mm lens can be the perfect companion for many different activities, including reportage, portraits, or even landscapes.
Mounted on an APS-C sensor, they become a short 75mm telephoto that is highly suitable for portraits.
In addition to their optical qualities, 50mm lenses usually use a simple optical formula. They are thus small, light, fast, and usually affordable, although at least one sells for more than 1,000 USD.
Many qualities, yes, but many models, too, and choosing the right one isn’t always easy. That’s why we have produced this short analysis.
Canon japan announced a service upgrade for the EOS 5D Mark II and EOS 7D that sees the camera’s mode dial will be replaced with a new locking version. The new design is similar to the current EOS 60D model, that it has a center button when pressed it allows the user to change the dial setting, and if center button is not pressed the dial will remain lock to prevent the changing of the mode setting while you travel.
Firmware version 1.2.3 incorporates the following fixes.
Fixes a phenomenon in which the settings of the Speedlite Transmitter ST-E2 revert to the default settings when both the camera and the ST-E2 are set to auto power off.
Fixes a phenomenon in which the Macro Ring Lite (MR-14EX, MT24-EX) and slave flashes do not sync while shooting wirelessly.
Firmware version 1.2.3 is for cameras with firmware up to Version 1.2.2. If the camera’s firmware is already Version 1.2.3, it is not necessary to update the firmware.
Canon 60D vs 550D vs 7D – which one is better? @ DigitalRev
Canon EOS Rebel T2i/550D
Canon EOS 60D
Canon EOS 7D
Sensor (effective resolution)
18-megapixel CMOS
(4 channel)
18-megapixel CMOS
(4 channel)
18-megapixel CMOS
(8 channel)
22.3 mm x 14.9mm
22.3 mm x 14.9mm
22.3 mm x 14.9mm
Sensitivity range
ISO 100 – ISO 6400/ 12,800 (expanded)
ISO 100 – ISO 6400/ 12,800 (expanded)
ISO 100 – ISO 6400/12,800 (expanded)
Continuous shooting
3.7 fps
6 raw/34 JPEG
5.3fps
16 raw/58 JPEG
8 fps
15 raw/94 JPEG
Viewfinder
magnification/
95% coverage
0.87x/0.54x
96% coverage
0.95x/0.59x
100% coverage 1.0x/0.63x
Autofocus
9-pt AF center cross-type
9-pt AF all cross-type; center cross to f2.8
19-pt AF all cross-type; center cross-type to f2.8
Shutter speed
1/4000 to 30 secs; bulb; 1/160 x-sync
1/8000 to 30 secs; bulb; 1/250 sec x-sync
1/8000 to 30 secs; bulb; 1/250 sec x-sync
Shutter durability
n/a
100,000 cycles
150,000 cycles
Metering
63-zone iFCL
63-zone iFCL
63-zone iFCL
Live View
Yes
Yes
Yes
Video
H.264 QuickTime MOV 1080/30p/25p/24p; 720/60p/50p
H.264 QuickTime MOV 1080/30p/25p/24p; 720/60p/50p
H.264 QuickTime MOV 1080/30p/25p/24p; 720/60p/50p
LCD size
3 inches fixed
1.04 megapixels
3 inches articulated
1.04 megapixels
3 inches fixed
920,000 dots
Wireless flash
No
Yes
Yes
Quick Guide: About Sensor Channel
Sensor Channel are the output data lane from sensor… 8 is better than 4 since it can transfer more data at the same time….The faster the camera can get the data off the sensor the faster it can fire the next shot.. resulting more fps (frames per second) in continuous brust/shooting mode.
Luminous-landscape written a very informative article on DSLR unexpected ISO behavior, Major camera manufacturers DSLRs are silently increasing the ISO without photographer’s knowledge. The data for whole analysis is given by DxO lab.
The above graph show the light loss at the sensor for different Canon and Nikon cameras when using a f/1.4 lens. For example the Canon EOS5D has -0.25 the D3s has -0.30 EV light loss…click on the image to see the larger version. In order to compensate for this light loss and produce correctly exposed images, camera manufacturers are compensating by silently increasing the ISO.
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DxOMark review: Which 50mm lens for my camera?
