noirdesir

Lives in Switzerland Switzerland
Works as a Engineer
Joined on Nov 4, 2006

Comments

Total: 695, showing: 1 – 20
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On article OPPO to announce 5x zoom smartphone technology at MWC (59 comments in total)
In reply to:

Zoom Zoom Zoom: Where is this news??? The Asus Zoom Phone did this 2 years ago already with a superslim phone without any unusually big camera protrusion and enclosing a 3x zoom inside. The ONLY reason it failed on sales is that they equipped the phone with an absolutely horrid and dated sensor and the photos were all crap! It only would take them to make the same phone with a good sensor to be a success. Why Asus never updated the phone is a mystery to me, then again, it's a company that I never understood and that only releases half baked products.. blows my mind how anyone would ever buy anything from Asus aside from motherboards which is the only thing they do well. From laptops to phones, I am yet to see ONE Asus product that is a finished concept or actually works well. So most likely is what Oppo will do, is just picking up where Asus left off, making a phone with a slightly longer zoom range within the same zoom lens design, and equipping it with something less than a mediocre sensor to match.

What would be news if (a) somebody produced a phone with a zoom that was actually a good product and (b) that was actually successful.

We can argue about whether a phone fulfils the first condition but looking at things from the other end, the fact that previous 'zoom phones' didn't get updates or successors pretty much tells us that they were not successful. And they probably weren't successful because they weren't good products.

But maybe more importantly, just because a phone is good or has a good camera, success is far from guaranteed, there are way too many other factors, starting with brand recognition, distribution and promotion. But it all starts with condition (a), without that, very few people will buy a 'zoom phone' over other phones.

Link | Posted on Feb 20, 2017 at 20:22 UTC
On article Sony FE 100mm F2.8 STF bokeh demystified (341 comments in total)
In reply to:

zeratulmrye: After seeing a lot of samples from this lens I have the feeling that the bokeh is so perfect that it starts to look fake (or a result of photoshop)......

The brightness of the background highlights and their colour in the sample image has been specifically set to something quite intense to make the difference in the blur disk very visible. If you want to highlight the vignetting of a lens, you choose a very uniform background/subject. If you want to highlight flare, you put the sun into one corner of the frame.

These are feature illustration shots, not shots to show off what lovely pictures the lens can take.

Link | Posted on Feb 18, 2017 at 00:59 UTC
On article Sony FE 100mm F2.8 STF bokeh demystified (341 comments in total)
In reply to:

zeratulmrye: After seeing a lot of samples from this lens I have the feeling that the bokeh is so perfect that it starts to look fake (or a result of photoshop)......

A 'perfect' Gaussian blur that varies in intensity with distance of the background elements (for which you would need a detailed depth map). Of course, if everything in the background is at the same distance, then a Gaussian blur in PS can simulate that (still there almost always will be edges at your in-focus subject that are not in focus but much closer than the rest of the background).

Link | Posted on Feb 17, 2017 at 19:21 UTC
On article Sony FE 100mm F2.8 STF bokeh demystified (341 comments in total)
In reply to:

Flashback: To get this level of creamy bokeh with a conventional lens, you'd probably have to go Leica Noctilux.

That's going to cost you 6x times the price and suffer a degree of softness wide open. In its favour however, it's much smaller and maintains its speed.

There is sheer blur disk size (or shallowness of DOF) and there is blur disk characteristics. A large blur disk needs a large entrance pupil, meaning large glass elements and thus a more or less expensive lens. Getting sharp images at the focal plane on lenses with large entrance pupils requires complex and expensive lens designs. Getting a nice blur disk, adds another difficulty to the lens design.

To get a nice introduction to blur disk variations between lenses, have a look at this thread: https://www.dpreview.com/forums/post/58088963

Link | Posted on Feb 17, 2017 at 19:15 UTC
On article Sony FE 100mm F2.8 STF bokeh demystified (341 comments in total)
In reply to:

jonny1976: i agree is smooth but terribly fake..really. it's interesting. i was interested in buying the laowa for app effect...how does it compares to sony?

There are clearly visible blur disks and there is 'normal' out-of-focus background. For the former, both the ones created by the APD lens and by a normal, neutral lens can be considered a special look. But for not-quite-so-out-of-focus backgrounds, I doubt the opposite of what an APD lens produces would produce (ie, hard outlines) would be considered as preferable, except for very specific styles that like to put out something jarring.

Link | Posted on Feb 17, 2017 at 19:09 UTC
On article Sony FE 100mm F2.8 STF bokeh demystified (341 comments in total)
In reply to:

Peter von Reichenberg: Finally a lens truly imitating Gaussian blur of Photoshop 👍

If you all you are interested in are a handful of large-ish, isolated blur disks, then this could be done in PS. But that is only a niche application for APD lenses, 99.99% of all images taken with an APD lens will have an almost infinite number of small blur disks that together create a smooth out-of-focus (or rather in most cases a smooth effect on areas only partially out-of-focus) that cannot be recreated in post.

To approach the effect of an APD lens, you'd need a 3D map of your scene to recreate this effect in post (the 'Portrait' feature of the iPhone 7 Plus attempts to do something like this by using the two cameras to create a rudimentary 3D map).

Link | Posted on Feb 17, 2017 at 19:04 UTC
On article Sony FE 100mm F2.8 STF bokeh demystified (341 comments in total)
In reply to:

Fabian from Swizzy Land: I find the STF image gives a better sense of depth. The regular picture on the right looks flat in comparison.

I think the gradient in the blur disk helps create that impression. It probably also helps that features that are only slightly out of focus still have this sharpish core from the centre of the blur disk.

But studying what creates perception requires lots of data to filter out all the different things that influence perception. My comments above are just a theory that would needed to be tested.

Link | Posted on Feb 17, 2017 at 18:58 UTC
On article Sony FE 100mm F2.8 STF bokeh demystified (341 comments in total)
In reply to:

MoreorLess: Honestly as with "onion bokeh" what I question is how important is the rendering of artificial points of light? people seem to love to test lenses bokeh by showing them but in terms of real use I very rarely find it an issue. General smoothness of bokeh and of course the simple abiliy to have a very thin depth of field are much bigger issues for me.

You don't need artificial light sources to get small 'light sources'. Think of anything with holes in front of a bright background or more common, specular 'light sources' (aka anything small with a convex shape that is reflective), from water drops to anything metal and curved but even things like leaves can be shiny and have small convex surface features.

But the most important thing is that point light sources are used in this article only to illustrate the effect clearly. Anything in the background is a point light source of varying intensity. The effective bokeh you get in every image is the superimposition of everything in the out-of-focus background. In most images, you aren't seeing clear out-of-focus blur disks, there are simply too many of them, they are too small and they overlap massively. Lenses whose bokeh is described as very smooth have exactly the blur disk of APD lenses (eg, Nikon 58 mm f/1.4). Lenses with a harsh bokeh have blur disks with bright outlines.

Link | Posted on Feb 17, 2017 at 18:52 UTC
On article New Canon EOS 77D sits between Rebel T7i and EOS 80D (50 comments in total)
In reply to:

noirdesir: Can be please get a graph showing the position of the different camera models in the hierarchy?

I've used the 'Compare' feature on this website and couldn't really find any difference between the T6i and T6s (besides the price and a video feature). I am sure there is one and I either missed it or the specs pages don't list it. Ditto, I have found no difference (except for price and physical dimensions) between the T7i and the 77D in the spec pages.

Using the naming that includes the 'Rebel' term, there is some clear logic with T4 being followed by T5, T6, etc.. Additionally the 'i' version, eg, T6i, gets released first and the 'plain' version, eg, T6, gets released a year or so later and has lesser/older components than sometimes even the old 'i' version (eg, T5i).

Link | Posted on Feb 15, 2017 at 23:47 UTC
On article New Canon EOS 77D sits between Rebel T7i and EOS 80D (50 comments in total)

Can be please get a graph showing the position of the different camera models in the hierarchy?

Link | Posted on Feb 15, 2017 at 15:15 UTC as 11th comment | 3 replies
In reply to:

perfectionist007: I just don't understand the reason to make it for only Macs.

Well, this isn't made by Apple. So, what's your point?

Link | Posted on Feb 13, 2017 at 23:56 UTC
In reply to:

perfectionist007: I just don't understand the reason to make it for only Macs.

a) Because they sell more.
b) Because they can sell it at a higher price.

Link | Posted on Feb 13, 2017 at 23:31 UTC
In reply to:

TwoMetreBill: Another carpal tunnel generator for Apple. Sheesh what is wrong with the Apple community that they put up with this abuse? I guess if they are willing to pay the Apple tax...

A third-party hardware maker releases a keyboard for another third-party application. How is any of this Apple's fault?

Link | Posted on Feb 13, 2017 at 23:29 UTC
On article Leica Summilux-SL 50mm F1.4 sample gallery (363 comments in total)
In reply to:

badi: interesting... but... at this "non leica size" for the camera and lenses, the SL system will have a tough competitor in the Hasselblad X system.
The cameras are about the same size and price. The lenses of the leica are much bigger and more expensive.
I know that if i could afford a hobby camera in this price range i would go for the hassy without any hesitation.

The fastest X1D lens has an equiv. f-stop of f/2.5 vs f/1.4 for the Leica lens. I think that gives the Leica lens a good excuse for being larger.

Link | Posted on Feb 6, 2017 at 14:18 UTC
In reply to:

Svetoslav Popov: What C1 needs is an updater. Downloading and installing the new version manually is so ninetees... :)

My experience with Windows 10 is all third-hand, as is most of my experience with Windows post-XP. I've only ever used Windows on non-personal workstations or in VMs, never as my main OS. The reason browser updates have moved to automatic (or semi-automatic, Chrome and Firefox 'only' check for updates for updates when you open the About window, but maybe that is only correlation and not causation, Firefox at least doesn't update until you restart it), is security updates. On the Mac, only the built-in malware protection is updated automatically.

Link | Posted on Feb 4, 2017 at 23:20 UTC
In reply to:

Svetoslav Popov: What C1 needs is an updater. Downloading and installing the new version manually is so ninetees... :)

Sure, Adobe Creative Cloud, web browsers and security-related aspects (like 'virus scanners') have moved to automatic (or semi-automatic) updates. Some aspects of the OS might have as well. But that is still very few applications compared to the hundreds you have installed on your system.

And even if most applications had auto-updating, it would be a completely irrelevant point. It's like preferring that your domestic help doesn't speak your language so they cannot speak back to you.

Link | Posted on Feb 4, 2017 at 15:12 UTC
In reply to:

Svetoslav Popov: What C1 needs is an updater. Downloading and installing the new version manually is so ninetees... :)

Adding an updater to C1 won't remove the download link on their website. They need to keep that anyway for people who install C1 for the first time. And whether you can run multiple versions in an alternating fashion also isn't affected by whether there is an updater or not. Ditto for resetting the trial period with every update. Nor does a built-in updater requires automatic updating. Very few apps with an updater actually do automatic updates.

There really is no advantage in not having an updater. It is really remarkable what contortions you guys go through to justify the lack of a standard feature of modern software. Imagine if every piece of software you have were to require a trip to a webpage, entering your email address, unpacking the downloaded application, copying it into the application folder and deleting the download with every update to it.

Link | Posted on Feb 4, 2017 at 13:47 UTC

Panasonic 7-14 mm f/4, released in March 2009, supported by C1 in February 2017. Better late than never.

Link | Posted on Feb 4, 2017 at 01:08 UTC as 10th comment
In reply to:

Svetoslav Popov: What C1 needs is an updater. Downloading and installing the new version manually is so ninetees... :)

And you always have to enter your email address to download every update.

Link | Posted on Feb 4, 2017 at 01:06 UTC

OIS and dual cameras are certainly good avenues to improve phone cameras. But I think another option is oversized sensors (sensors larger diagonally than the lens' image circle). Depth is at a premium in smartphones, width much less so. Oversized sensors are more expensive, but at the phone sensor size that premium should modest enough.

An oversized sensor behind the same lens doesn't increase the depth of the camera module. It can give wider one-shot panoramas, it can create closer to square aspect ratios (4:3, 4:5, 1:1) that use a larger sensor area than cropping a typical 2:3 image down to those ratios. It can allow for switching between portrait and landscape after the fact (like the Snap spectacles).

But of course, the image quality improvements (from having a larger effective sensor area) of an oversized sensor pale against those achieved for example by the swiping panorama modes or things like temporal noise reduction.

Link | Posted on Jan 27, 2017 at 19:59 UTC as 34th comment
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