If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#12
|
|||
|
|||
Dynamic Range of Point & Shoots...
wrote:
MarkČ (lowest even number here) wrote: I seriously doubt you'll find anything that backs up this claim. Please cite your data, if you've found something would have to defy logic. The EOS 400D review at DPreview claims that the 400D has a dynamic range that's roughly 5% better than the D80, 350D, and the Sony Alpha. The usable range is supposed to be around 8.4EV. In their EOS 5D review (same author), the measured dynamic range was around 8.2 EV. These were done in JPEG tests. Both cameras have about one extra stop of headroom in RAW mode. Those who are concerned about the minutia of dynamic range differences are unlikely to shoot in jpeg. Has it occurred to you that jpegs are far more limited than the range that can be pushed/pulled from a RAW file? Once you convert to jpeg, you've given away a tremendous amount of data and potential dynamic range. -- Images (Plus Snaps & Grabs) by MarkČ at: www.pbase.com/markuson |
#13
|
|||
|
|||
Dynamic Range of Point & Shoots...
Colin_D wrote:
wrote: MarkČ (lowest even number here) wrote: I seriously doubt you'll find anything that backs up this claim. Please cite your data, if you've found something would have to defy logic. The EOS 400D review at DPreview claims that the 400D has a dynamic range that's roughly 5% better than the D80, 350D, and the Sony Alpha. The usable range is supposed to be around 8.4EV. In their EOS 5D review (same author), the measured dynamic range was around 8.2 EV. These were done in JPEG tests. Both cameras have about one extra stop of headroom in RAW mode. The difference in test results is so small, it's probably more accurate to say that neither the 400D nor the 5D has a real advantage in dynamic range --- at least based on this one test. Which is interesting, considering all the hoopla about the big bad full frame sensor having better dynamic range than a tiny sensoor in an entry-level digital rebel. Maybe I misunderstood the articles? Read for yourselves: http://www.dpreview.com/reviews/canoneos5d/page22.asp http://www.dpreview.com/reviews/canoneos400d/page19.asp See also this link from Roger Clark: http://www.clarkvision.com/imagedeta...rmance.summary where the 5D is vastly superior to all other cameras. Colin D. And note that Figure 4 in digital.sensor.performance.summary all the DSLRs real dynamic range bump up against the 12-bit A/D limit (the pink horizontal line at about 11.6 stops). Thus, it would be expected that the 400D and 5D would measure out to the same dynamic range at low ISO. But they would diverge as the ISO increases (similar to Figure 5: the D200 would be close to the 400D, and the 1D Mark II would be essentially the same as the 5D). Roger |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
dynamic range | Paul Furman | Digital SLR Cameras | 36 | February 22nd 06 04:05 AM |
Fastest point and shoots?? | chas | Digital Point & Shoot Cameras | 3 | June 9th 05 04:41 AM |
Top 5 Point and Shoots under $500 | measekite | Digital Photography | 12 | March 1st 05 04:15 AM |
Top 5 Point and Shoots under $500 | measekite | Digital Photography | 0 | February 27th 05 07:48 AM |
Are we ignored regarding dynamic range? | ThomasH | Digital Photography | 43 | January 1st 05 11:32 PM |