oscarvdvelde

oscarvdvelde

Lives in Spain Castellgalí, Spain
Works as a lightning research
Joined on Apr 29, 2006

Comments

Total: 69, showing: 1 – 20
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On Entry-Level Mirrorless Camera Roundup (2014) article (116 comments in total)
In reply to:

marc petzold: Virtually, besides the X-M1 vs X-A1, the only difference is, that the A1 is way cheaper, but build into the same package (body) and uses a ordinary Bayer Sensor, not X-Trans...but that comes in handy especially when shooting landscapes and foliage, the X-Trans Sensors don't look too good into that way for my eyes, apart that, they're very fine, indeed.

But i must say that i would mention, the X-A1 and X-M1, both do have also a plasticky feeling like the A3000, and being far away from for instance a X-E1(2) or X100-alike Body, which are made out of alu magalloy, and not plastic.

Try this: download the RAF file of the river at this page: http://www.fotopolis.pl/n/17408/fujinon-xf-27-mm-f28-test/?page=14 and open it in RawTherapee. It's full of details in the green, freaking amazing. This totally removed my doubts about X-Trans. But the OOC JPEGs I see everywhere (and many say are "sharp" unfortunately lack that detail. Just like Canon JPEG vs raw.

Direct link | Posted on Dec 18, 2014 at 04:51 UTC

Looking at the full gallery, the panel will have a hard time going through the images. Of the 10 pages only a minority of submissions qualify as scientific photography.
http://rps-science.org/competition/all/International-Images-for-Science/entries/?page=10&sort=&category=&competition=1

Direct link | Posted on Dec 7, 2014 at 23:22 UTC as 1st comment | 1 reply
On Casio targets golfers with Japan-only Exilim EX-FC500S article (36 comments in total)
In reply to:

oscarvdvelde: A few years ago Casio had unique features I would still like to see in cameras from other manufacturers. You could actually press the shutter or record button after an event (e.g. sports, children or animals, lightning) and save the images or video of the action!

The difference is this. Instead of recording all video to storage media, the camera stores images in a circular buffer (when you "arm" or "pretrigger" it), which may be a second worth of video, for example. When you press the trigger upon seeing the action you were waiting for, the buffer stops filling. You may then further reduce the selection and save that to card. This is also how high speed camera systems work like Vision Research Phantom cameras.

Direct link | Posted on Nov 25, 2014 at 03:58 UTC
In reply to:

srados: Hey Canon, Sony just imagined impossible...

Canon was looking at Sony's factory and saw impossible.

Direct link | Posted on Nov 20, 2014 at 22:30 UTC
In reply to:

Auricom: SONY: does hearing that name send euphoric energy ripples up and down your spine? /:o

it still sounds like Walkman, Handicam, Trinitron and My First Sony to me. It's hard to shake off.

Direct link | Posted on Nov 20, 2014 at 22:25 UTC
On Casio targets golfers with Japan-only Exilim EX-FC500S article (36 comments in total)

A few years ago Casio had unique features I would still like to see in cameras from other manufacturers. You could actually press the shutter or record button after an event (e.g. sports, children or animals, lightning) and save the images or video of the action!

Direct link | Posted on Nov 19, 2014 at 13:12 UTC as 8th comment | 6 replies

1100g! My Tokina 16-28mm is 950g which makes for an awkward and tiresome carrying experience. But potentially this lens is even more interesting by the addition of stabilization. If the coating eliminates flare it will be a huge advantage over the Tokina, which is prone to green reflections all over and rainbow patterns around bright lights at night.

I shall hope Tamron has a better build consistency and quality control than Tokina. In 2011 I've sent 2 Tokinas from the shop back after testing, they were too decentered. The third I kept but some screw holding the mount inside the lens failed after a year. When it came back from Tokina service, some optical group is loose, resulting in good or bad focus accuracy depending on lens tilt. In a few rare cases the lens autofocus motor went wild on my Canon 5D, cured by removing the battery from the camera.

It also looks like the Tamron avoids the AF/MF focus clutch (focus ring pull action) - a good thing!

Direct link | Posted on Sep 12, 2014 at 17:09 UTC as 25th comment | 3 replies
On Fast and full-frame: Nikon announces 24MP Nikon D750 article (407 comments in total)

This seems what I wanted the 6D to be. Tilting screen, great for timelapse, wide dynamic range at low ISO, highlight-weighted metering.
Still shooting the old 5D till Canon comes with something like this. Except Canon only updates the full frame cameras every 3-4 years...

Direct link | Posted on Sep 12, 2014 at 06:31 UTC as 58th comment | 16 replies
On Opinion: Do we really need the Fuji X30? article (310 comments in total)

This update doesn't look as minimal as Canon 20D to 30D (picture style + bigger screen only). In fact if Canon would have made a tilt screen on the 6D and not have made HDR raw saving and other software limitations compared to 5DmkIII I would likely have bought it already as upgrade from my old 5D. The same logic applies if I were looking for a X20/X30 type of camera. X30 is more attractive to me.

Direct link | Posted on Sep 1, 2014 at 03:49 UTC as 10th comment
On What is equivalence and why should I care? article (2071 comments in total)
In reply to:

gianstam: About total light.
So, I have a question to DPReview?
Do the Sony and Nikon FF cameras produce different noise at pixel level when used at different formats for the same sceen?

My point of view: the sensor does not behave as a whole.
The electric signal from each photosite is not affected by the the total light.
Sensor is not a sun light collector (larger surface, more electric power).
Image (and noise and DR) is produced by pixels. Same tecnology and size pixels produce the same results.
So the advandage of the larger sensor appears not because of the more light but because of the more (same sized) pixels or because of the larger pixels (for the same Megapixel sensors).

Very informative article by the way.

veroman - this is because you can allow your pixels to be larger for the same resolution or have more of them (higher resolution, less magnification per pixel) without shrinking them.

Direct link | Posted on Jul 7, 2014 at 22:15 UTC
On What is equivalence and why should I care? article (2071 comments in total)

Sensors don't read out the total amount of light. They read individual pixels. If the light per square mm is equal (same f-stop) and the pixels are the same size and quality, the same gain will be applied. For the smaller sensor this however results in fewer megapixel image, effectively a direct crop of the larger sensor, in which any noise is identical but more magnified in the smaller sensor.
But typically the smaller sensor will have a similar megapixel count (final magnification), reached by a larger pixel density. The light per square mm is then divided over more pixels in the small sensor case, resulting in fewer photons per pixel. In order to produce the same RGB values for the same exposure (shutter and aperture) the gain needs to be increased which leads to more visible noise and loss of highlight range. The ISO value relates simply scene lighting, exposure and RGB result, so the small sensor in this example has more gain applied for any given ISO.

Direct link | Posted on Jul 7, 2014 at 21:14 UTC as 292nd comment
On Fujifilm teases upcoming SLR-style X system camera article (919 comments in total)

Fujifilm is doing interesting things, but when you need four lenses and a camera replacing your current setup of another brand (e.g wide zoom, fast standard prime, macro, telezoom) you'll need at least 4000 euros. This makes it more attractive to just update the body of your current full frame setup.

Direct link | Posted on Jan 20, 2014 at 19:57 UTC as 112th comment
On Fujifilm X-A1 real-world and test scene samples article (105 comments in total)
In reply to:

jenbenn: Hm if a look at the green felt in the test scene the disadvantages of the x-trans sensor in the x-m1 and x-e2 compared to the x-a1 becomes very obvious. Both JPGS and RAWs of the x-e2 and the x-m1 are much softer compared to the corresponding files from the x-a1. So far I thought that the x-trans softness was a raw converter problem. From the test scene it appears however that even Fuji hasn't found a proper way to process the x-trans data for their in-camera jpgs!

Fuji as much as I love your cameras, please, drop that stupid xtrans colour filter array.In reality images created from bayer sensors (which include an anti alising filter) are much sharper. The noise advantage often attributed to x-trans is not real as it comes at the expense of softer files. Sorry but the same can be achieved with a proper raw converter and some noise reduction.

There are other comparisons which clearly show X-Trans to have the edge. But DPReview uses Adobe Camera RAW whose X-Trans conversions are still not as good as some other converters.

Direct link | Posted on Jan 5, 2014 at 00:32 UTC
On Sony Alpha A7 / A7R preview (2372 comments in total)
In reply to:

Jogger: I would like one with the 16mp sensor from the D4/Df; 36mp is way overkill for this type of camera. For studio work or landscape work, the portability isnt really that important.. just get a D800/e.

Camera shake is measured in degrees of viewing angle. Say you shoot a scene of 50° with three cameras, 36 MP, 24 MP and 6 MP. Your camera shake may be 0.05°, that's about 1/10th of the moon's apparent diameter. That is 1/1000th of the view. Your 6 MP camera makes photos of 3000 pixels wide, the 24 MP camera 6000 pixels wide, the 36 MP 7348 pixels wide. You will see the shake in all cameras at 100% actual pixels (3, 6 and 7.3 pixels wide). But if the final magnification of the image is the equal, e.g. A4 print viewed at equal distances, you won't see any difference. The other side of the coin is that you won't have any advantage over that 6 MP camera if you allow such vibrations.

Direct link | Posted on Nov 15, 2013 at 17:24 UTC
On What just happened?! Looking back on last week article (98 comments in total)
In reply to:

Branko Collin: It felt like there was an invisible trade show going on. Did you call the manufacturers to ask them "why now"?

Canon remained so silent. October 23-24 for a major Canon announcement?

Direct link | Posted on Oct 21, 2013 at 19:43 UTC

"In the end, Hasselblad, with this new initiative, is hoping to attract a larger, younger audience to its range of cameras, says Peter Stig-Nielsen, Hasselblad's director of professional camera products."
- http://www.bjp-online.com/british-journal-of-photography/news/2206781/hasselblad-were-not-robbing-people-off-with-lunar-camera

Except that the younger audience does not have this kind of money and even if they had it, full frame makes more sense.

Direct link | Posted on Jul 22, 2013 at 21:19 UTC as 13th comment
In reply to:

Cane: One would think Canon would just buy out Magic lantern, or their engineers, and put this stuff into their camera's to begin with? I know, crazy thought to make a product to max out it's abilities, when someone else can just take your product and make it better for you. That doesn't make you look foolish, does it?

Canon could buy out or sue MagicLantern, followed by keeping everything the same (read: their profit)

Direct link | Posted on May 13, 2013 at 19:25 UTC

Fortunately for us they brought a decent camera and a tripod instead of a mobile phone.

Direct link | Posted on Mar 27, 2013 at 01:37 UTC as 57th comment
On Photoshop Gradient Tool: Blending Images article (223 comments in total)
In reply to:

TWIZEEL: I can't understand a people who says it is cheating. That is Visual Art, not a sport competition, not a court evidence. Artists (photographer) could use any mean to transfer his impression to audience. Only we can arguing is about technics itself.

well, as a stormchaser, I like to see a scene as it was. And a good photographer can get such scene, if he persists. Not like oh, I got this supercell with ugly powerlines here and last summer a nice farm with boring blue sky, let's merge it and voilà the shot of my life. How proud could someone be of that...

That being said, if your job depends on selling a shot with those characteristics of two separate scenes then go for it. Just don't pretend to others that it's real.

Direct link | Posted on Mar 11, 2013 at 03:19 UTC
On Photoshop Gradient Tool: Blending Images article (223 comments in total)
In reply to:

akophoto: I teach the same method all the time. Have done for last three years.
Adding a sky is cheating in my eyes as the scene never existed.
The correct use for this method is for blending bracketed exposures when the cameras dynamic range cannot expose a whole scene. For example a sunrise.

depends if you use Photoshop for photographic tweaks, versus artistic cheats.

Direct link | Posted on Mar 11, 2013 at 03:13 UTC
Total: 69, showing: 1 – 20
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