Timings & File Sizes
The performance of the DX4900 was pretty much a mixed bag. Power on / off timings were average for this kind of camera (extending lens). Auto focus was surprisingly fast with an average AF time of around three quarters of a second (fast by digital camera standards) and sometimes even faster at wide angle with good light. Unfortunately this good AF performance was let down by a badly lagged LCD live view display and a longer than usual shutter release lag.
Also slow was image writing. This appeared to be a combination of a slow CF interface and limited internal processing power. It took notably longer to shoot and store lower resolution images than higher (see lower down this page).
Timing Notes: All times calculated as an average of three operations. Unless otherwise stated all timings were made on a 2272 x 1712 Fine JPEG image (approx. 850 KB per image). The media used for these tests was a 256 MB Viking CF card.
|Power: Off to Record||Lens extends||4.7|
Power: Off to Play *1
|Power: Record to Off||Lens retracts||2.7|
|Power: Play to Off *1||Lens already retracted||0.5|
|Mode: Record to Play||Image displayed||0.5|
|Mode: Play to Record||2.3|
|Play: Image to image||2272 x 1712 Fine||<0.5|
|Zoom from Wide to Tele||Full zoom from 35 mm to 70 mm (2 x)||1.8|
|Auto Focus LAG||Wide angle (35 mm) *1||0.5 - 0.8|
|Auto Focus LAG||Telephoto (70s mm) *1||0.8 - 1.1|
|Shutter Release LAG||Using viewfinder||0.2|
|Shutter Release LAG||Using LCD monitor *2||0.4|
|Total LAG||Using viewfinder *3||~0.9|
|Total LAG||Using LCD monitor *3||~1.1|
|Off to Shot Taken||6.4|
|Shot to Shot||Only for first two shots, after that >5 sec||3.8|
|*1||Add approximately 0.8 seconds for low light situations|
|*2||We were surprised by how large the LCD lag was, the timing includes any lag introduced by the LCD 'live view'.|
|*3||Depending on focus and light levels|
Auto Focus LAG is (roughly) the amount of time it takes the camera to autofocus (a half-press and hold of the shutter release button), this timing is normally the most variable as its affected by the subject matter, current focus position, still or moving subject etc. This timing is an average.
Shutter Release LAG is the amount of time it takes to take the shot after autofocus, this timing assumes you have already focused (half-pressed the shutter release) and now press the shutter release button all the way down to take the shot. This timing is an average.
Total LAG is the total time it takes (not just the two above added together)
if you haven't pre-focused, that is no finger touching the shutter release
button, press it all the way down in one movement, this new timing is
how long it'd take if you were in one of those spur-of-the-moment situations.
This timing is an average.
The DX4900 has only one continuous shooting mode, 1224 x 816 (300 KB JPEG) @ 3.8 fps.
|Mode||Image Type||Frames per sec||Max no. of frames *1||
|Continuous||1224 x 816||3.8 fps||12||11.0 sec|
|*1||In a single "burst", finger held down on shutter release until the camera stops shooting.|
|*2||You can take a frame as soon as there is space in the cameras internal buffer, writing continues "in the background".|
File Write / Display and Sizes
Timings shown below are the time taken for the camera to process and "flush" the image out to the Compact Flash card, the timer was started as soon as the shutter release was pressed (shutter click was heard) and stopped when activity indicator on the LCD stopped blinking. This means the timings also include the cameras processing time and as such are more representative of the actual time to "complete the task". The media used for these tests was a 256 MB Viking CF card.
file size *2
16 MB CF Card
|2448 x 1632 (4.0 mp)||17.1||~850 KB||12|
|2448 x 1632 (4.0 mp high compr.)||16.1||~380 KB||24|
|2160 x 1440 (3.1 mp)||22.5||~730 KB||16|
|1800 x 1200 (2.2 mp)||19.1||~450 KB||23|
|1224 x 816 (1.0 mp)||13.4||~240 KB||46|
|*1||Timings taken with 'Instant Playback' disabled. With Instant Playback enabled you can add 2.5 seconds to these times.|
|*2||All file sizes are an average of three files. As is the case with JPEG it's difficult to predict the size of an image because it will vary a fair amount depending on the content of the image (especially the amount of detail captured). For example, take a photograph of a fairly empty wall and you'll get a small JPEG, take a photograph of a bush with a lot of detail and you'll get a larger image. File sizes here are closer to the later, the larger size of file you should expect.|
The DX4900 is clearly struggling with its limited processing power. The noticeable effect of this is that (a) it takes a long time (compared to other 4 mp digital cameras) to write an image and (b) it takes LONGER for smaller images than for larger (because the processor has to 'down-sample' the image before it is saved). The DX4900's playback is virtually instant so we didn't need to time that.
We ran the camera through our new battery life test. This test is designed to be fair and comparative to each camera and battery type:
- Take 4 shots without flash
- Wait 2 minutes (50% of the time powering the camera off)
- Take 1 shot with flash
- Wait 1 minute
Batteries are fully discharged and recharged before the test and all cameras were reset to their factory default settings. Here are the results:
Compact / Ultra compact
|Battery||Power||Battery life||Number of shots|
|Kyocera S3||BP-800S||2.1 Wh||54 mins||95|
|Canon PowerShot S300||NB-1L||2.5 Wh||1 hr 26 mins||155|
|Pentax Optio 430||D-LI2||3.3 Wh||1 hr 33 mins||160|
|Olympus C-40Z||2 x AA NiMH 1600 mAh (GP)||3.6 Wh||1 hr 33 mins||165|
|Nikon Coolpix 3100||2 x AA NiMH 1600 mAh (GP)||3.6 Wh||1 hr 42 mins||175|
|Minolta DiMAGE F100||2 x AA NiMH 1600 mAh (GP)||3.3 Wh||1 hr 42 mins||175|
|Minolta DiMAGE X||NP-200||2.8 Wh||1 hr 45 mins||180|
|Pentax Optio 330||D-LI2||3.3 Wh||1 hr 48 mins||185|
|Canon PowerShot S330||NB-1LH||2.5 Wh||1 hr 48 mins||185|
|Sony DSC-P71||2 x AA NiMH 1600 mAh (GP)||3.6 Wh||1 hr 50 mins||185|
|Kodak DX4900||2 x AA NiMH 1600 mAh (GP)||3.5 Wh||1 hr 51 mins||190|
|Sony DSC-P5||NP-FC10||2.4 Wh||1 hr 51 mins||190|
|Nikon Coolpix 3500||EN-EL2||4.1 Wh||1 hr 54 mins||195|
|Sony DSC-P9||NP-FC10||2.4 Wh||1 hr 59 mins||200|
|Nikon Coolpix SQ||EN-EL2||3.7 Wh||2 hr 03 mins||210|
|Minolta DiMAGE Xt||NP-200||2.8 Wh||2 hr 12 mins||225|
|Canon PowerShot S400||NP-1LH||2.5 Wh||2 hr 17 mins||230|
|HP Photosmart 812||2 x AA NiMH 1600 mAh (GP)||3.6 Wh||2 hr 21 mins||240|
|Nikon Coolpix 885||EN-EL1||4.8 Wh||2 hr 21 mins||240|
|Nikon Coolpix 775||EN-EL1||4.8 Wh||2 hr 27 mins||250|
|Canon PowerShot SD100||NB-3L||2.9 Wh||2 hr 29 mins||250|
|Pentax Optio S||D-LI8||2.6 Wh||2 hr 33 mins||260|
|Nikon Coolpix 2500||EN-EL2||4.1 Wh||2 hr 33 mins||260|
|Fujifilm FinePix F601Z||NP-60||3.7 Wh||2 hr 47 mins||275|
|Casio EXILIM EX-Z3||NP-20||2.5 Wh||2 hr 48 mins||285|
|Casio EXILIM EX-S3||NP-20||2.5 Wh||2 hr 48 mins||285|
|Olympus C-50Z||LI-10B||4.0 Wh||2 hr 54 mins||295|
|HP Photosmart 935||2 x AA NiMH 1600 mAh (GP)||3.6 Wh||3 hr 09 mins||320|
|Canon PowerShot A70||4 x AA NiMH 1600 mAh (GP)||7.7 Wh||5 hr 08 mins||515|
|Other test notes:|
| LCD monitor is left on during
the battery test
The camera is powered off half of the time and left on half of the time (switch every 10 iterations)
There are now higher capacity AA NiMH batteries available, however in the interests of fair
comparison we will continue to use our 1600 mAh test set
The DX4900 performed well in our battery test. Considering it only requires two AA batteries the DX4900 managed to keep going for almost two hours, putting in an almost identical performance to Sony's DSC-P71 which also takes two AA batteries.
|splat by Eb Swarbrick|
from Album cover for a rock band
|Madagascar1 by Jaklab|
from Mind and matter - the creations of humanity.
CVS is banning digitally altered beauty imagery on its store-brand beauty products, and plans to mark other brands' images as "Digitally Altered" if they're not up to snuff by the end of 2020.
Canon has announced that it will introduce a series of printers that allow users to refill the ink tanks themselves—a surprising shift that could, in theory, save customers quite a bit of money.
Adventure and lifestyle photographer Lucy Martin put together a useful little video that goes over her 18 favorite Lightroom shortcuts—a great guide for beginners.
Following a series of allegations of sexual misconduct against Bruce Weber and Mario Testino, magazine publisher Conde Nast has severed ties with both of the famed fashion photographers, and released a code of conduct for future photo shoots.
Photographer Christopher Payne captures the 'colorful world of craft and complexity' you'll find in the General Pencil Company's factory in Jersey City... and almost nowhere else.
A new feature in the Google Arts & Culture app compares your facial features to its database of thousands of artworks, finding your fine art "doppelganger."
Recently, we spent a day in Los Angeles with photographer, cook and food blogger Kylie Mazon. Join us and see how Kylie approaches the challenge of shooting lifestyle and promotional images for a downtown hotel with the Canon EOS M6.
Leica has announced a pair of short telephoto lenses for its SL full-frame mirrorless camera. The APO-Summicron-SL 75mm and 90mm F2 ASPH lenses feature an apochromatic design to reduce chromatic aberration, one aspherical element and minimum focusing distances of around 0.5m.
The Panasonic G9 is the brand's top-tier stills camera. We've updated our already large sample gallery with even more photos to enjoy.
The latest product of Huawei's collaboration with Leica is a smartphone with a great all-around imaging feature set that left us very little to complain about.
In this quick video, award-winning travel photographer Bob Holmes shares nine of his most basic and straightforward tips for finding great images, even when you're in a rut.
Gudsen has launched a new gimbal that’s aimed at mirrorless photographers. With a payload of 3.9lbs/1.8kg, the new Moza AirCross can provide stabilization to a mirrorless body even fitted with a cinema lens and a new in-handle option can provide power to Sony and Panasonic cameras.
The Lensbaby 46mm Macro Kit comprises of three stackable filters with different magnification levels, which can be combined with several of the company's "bokeh effect" lenses.
Nikon Rumors is reporting that an upcoming full-frame mirrorless camera from Nikon will sport an all-new "Z-Mount" with an extremely short flange distance of just 16mm.
A lot of people still have positive associations with the Kodak brand and its iconic logos, but it’s worth clearing something up: not everything with the Kodak name on it has much connection to a bunch of clever people in Rochester, New York.
A leaked image of a Galaxy S9 retail box indicates the new model might come with a variable aperture lens and a super-slow-motion video mode.
The portable little scanner features a 3.5-inch color screen, an integrated SD card slot for saving your scans, adapter trays for different types of film, and an HDMI port for viewing your scans directly on an external display.
Yesterday, Canon Italy and Canon Spain accidentally shared a composite photo that contained stolen elements shot with a Fujifilm camera. Today, in a response on social media, the company somehow managed to make things worse.
We've got a pair of Sigma 16mm F1.4 DC DN lenses in the office: one for Micro Four Thirds and the other for Sony E-mount. In this article we have some impressions of the MFT version, as well as some other lenses in this class worth considering.
Most wedding photographers are probably open to a little bit of feedback from their clients, but one Hong Kong couple was reportedly so upset, they provided their photographer with a detailed 30-page report full of their grievances!
It appears Huwei's ties to the Chinese Government and a fear of espionage have played a role in AT&T's decision not to offer the Huawei Mate 10 Pro and it's Leica-branded dual camera to customers in the United States.
The Autel Robotics EVO looks like the first serious competitor for DJI's Mavic Pro Platinum. With a better remote, slightly better camera, and a slightly cheaper price tag, this drone could steal some serious Mavic market share.
Sony has released firmware version 2.00 for its flagship a9 mirrorless camera. The most notable improvements are to continuous AF, but overall stability has been addressed, as well.
Kodak just debuted a bitcoin mining machine for rent at CES, leaving photographers slack-jawed and confused, and cryptocurrency mining experts balking at what they claim is an outright scam.
Hong Kong drone manufacturer Yuneec has announced three new drones at CES including an update to the Typhoon H with a bigger sensor with more resolution and the ability to shoot 4K at 60fps.
Oops. In their rush to post a pretty picture last night, multiple Canon social media accounts accidentally shared a composite, huge portions of which were stolen and shot with a Fujifilm X-T1.
We've published our studio test scene for Panasonic's video-focused Lumix DC-GH5S Micro Four Thirds camera. Have a look to see how it stacks up against the GH5 and Sony's a7S II.
LaCie's new DJI Copilot hard drive was purpose built for drone photographers and videographers who want to back up and even review their full resolution photos and video on-the-go.
The next Samsung flagship smartphone—which might be the first smartphone with a variable aperture lens—is not being announced or even teased at CES, as previously thought. Instead, Samsung confirmed that the phone would arrive in February.
"What bothers me more than the fact that these photographers missed the play of the game, is the amount of 'bashing' that they are being subject to on many social media platforms [...] as an industry, WE ARE BETTER THAN THAT!"