falconeyes

falconeyes

Lives in Germany Germany
Has a website at falklumo.blogspot.com
Joined on Apr 28, 2008

Comments

Total: 1047, showing: 21 – 40
« First‹ Previous12345Next ›Last »
On article The Sony a9 is a 24MP sports-shooting powerhouse (1857 comments in total)

> The new α9 also supports uncompressed 14-bit RAW, ensuring users can get the most out of the wide dynamic range of the sensor.

Still no lossless compressed raw.

Link | Posted on Apr 19, 2017 at 17:07 UTC as 277th comment | 16 replies
On article The Sony a9 is a 24MP sports-shooting powerhouse (1857 comments in total)
In reply to:

jim seekers: How many fps on 4K Video does the A9 Do.
is it 30 or 60 as I can't see it.

If you read the footnote #15, you deduce that it is
- 4k@24p (full FoV)
- 4k@25p (full FoV)
- 4k@30p (narrowed FoV / cropped)
and no 4k@50/60p.

That's also in line that it can do 2k@120p butno 2k@240p.

Moreover, 4k will have severe rolling shutter.

Link | Posted on Apr 19, 2017 at 17:02 UTC
On article The Sony a9 is a 24MP sports-shooting powerhouse (1857 comments in total)
In reply to:

Yak27: Although Sony website says the viewfinder is Quad VGA, I believe it's actually Quad HD. Because they also say it has 3.6 million dots (3,686,400), which precisely matches Quad HD megapixel count. (The megapixel count of Quad VGA is 1,228,800)

https://en.wikipedia.org/wiki/Graphics_display_resolution#SXGAminus
https://en.wikipedia.org/wiki/WQHD

rgb

Link | Posted on Apr 19, 2017 at 16:46 UTC
On article The Sony a9 is a 24MP sports-shooting powerhouse (1857 comments in total)
In reply to:

Dr_Jon: Can you please test the rolling shutter - very important if the e-shutter is to be an important thing - BTW is the mechanical shutter really limited to a (joke at $/£4500) 5fps? (You can just aim a video here to get a result: http://www.dvxuser.com/V6/showthread.php?303559-Measuring-rolling-shutter-put-a-number-on-this-issue or do it yourselves.)
Also is there 4k/60p?
Is there 4:2:2 video?
What's the data-rate of 4k video?
Is there a video mode (like Panasonic's 6k) that samples above 4k?
If it's a pro sports camera how come weather resistance doesn't get a mention?
How are the PDAF pixels handled - are they treated as "dead pixels" as usually happens with non-Canon on-sensor PDAF)?
I was so hoping for an A7sIII, oh well....

You can compute rolling shutter from the read out speed.
Max readout speed is 6000x3375x24 pixels/s (less resolution at 30fps per the footnote). At HD resolutions (with binning or skipping, the readout should be 5x faster which it is (120fps)).

This gives you a rolling shutter (1/120s) which is about twice as bad as a mechanical 1/250s shutter. And rolling shutter (skewing) was never considered a problem in still photography. AT 50% the performance, rolling shutetr should have become barely noticeable in HD recording.

Still pretty strong though in 4k or full electronic shutter stills.

Link | Posted on Apr 19, 2017 at 16:44 UTC
On article The Sony a9 is a 24MP sports-shooting powerhouse (1857 comments in total)
In reply to:

Yak27: Although Sony website says the viewfinder is Quad VGA, I believe it's actually Quad HD. Because they also say it has 3.6 million dots (3,686,400), which precisely matches Quad HD megapixel count. (The megapixel count of Quad VGA is 1,228,800)

https://en.wikipedia.org/wiki/Graphics_display_resolution#SXGAminus
https://en.wikipedia.org/wiki/WQHD

Quad VGA has 1280x960 x3 or 3,686,400 dots.

Link | Posted on Apr 19, 2017 at 16:34 UTC
On article The Sony a9 is a 24MP sports-shooting powerhouse (1857 comments in total)

Wow.

Except for this:
> The Fast Hybrid AF system achieves approximately 25% faster performance when compared with α7R II

which wouldn't be in one league with true sports cameras actually.

Link | Posted on Apr 19, 2017 at 16:31 UTC as 310th comment
On article Hasselblad X1D final production sample gallery (142 comments in total)
In reply to:

Rodenmg: I know the dollar ain't what it use to be but come on. $43000. Say it again and think about it. $43000.

You missed my irony smiley

Link | Posted on Apr 16, 2017 at 23:16 UTC
On article Hasselblad X1D final production sample gallery (142 comments in total)
In reply to:

Rodenmg: I know the dollar ain't what it use to be but come on. $43000. Say it again and think about it. $43000.

@zzzxtreme there aren't any with the "Verified Purchase" filter active.
...
Strange :)

Link | Posted on Apr 16, 2017 at 10:02 UTC
On article Light's L16 camera is in final stages of testing (300 comments in total)
In reply to:

orion1983: ...and what is the size of a single 23MP sensor? I could not find this info....

> There is no such thing as "an array of lenses with no gaps" at the level of the bokeh (especially if those lenses have variable apertures).

Well, theoretically, yes. If you cut (non wide-angle) lenses into hexagonal (or rectangular) shape and pack dense. In a true lens array, you don't have variable apertures. You just use fewer lenses to stop down (i.e., stopping down can be a post capture operation).

Nevertheless, in practice (as you say) there will always be gaps and flaws and arrays have worse resolution than single big lenses. We are talking best possible compromises here in order to make cameras as slim as a smartphone. Yes, the OOF rendering of point sources is extremely sensitive to flaws. But at the same time, the easiest case for synthetic bokeh.

Link | Posted on Apr 16, 2017 at 09:32 UTC
On article Light's L16 camera is in final stages of testing (300 comments in total)
In reply to:

orion1983: ...and what is the size of a single 23MP sensor? I could not find this info....

After the initial launch, I was in short conversation with one of the founders of Light. My understanding was that this entire topic of synthetic bokeh ranks secondary on their list, having to complete a good working camera ranks first.

Yor are right above. However, an array of lenses with no gaps doesn't need to solve a stereo matching problem in order to yield a perfect bokeh.

Moreover, the stereo matching problem isn't only hampered by occlusions. But by noise and a lack of features too. It's almost as bad a problem as the automatic foreground masking in photoshop.

Link | Posted on Apr 15, 2017 at 23:24 UTC
On article Light's L16 camera is in final stages of testing (300 comments in total)
In reply to:

orion1983: ...and what is the size of a single 23MP sensor? I could not find this info....

@ProfHankD, theoretically, occlusion (parallax) just produces the bokeh (by simply overlaying all indivudual frames).

The problem are the holes of missing lenses positions (which are large for the L16) which leads to a very busy bokeh. One can try to compute a depth map and compuationally simulate a better bokeh. But only up to a point.

Ideal would be hexagonally cut lenses packed with no holes, rendering into a smooth bokeh. Would look like insect eyes on the back of smart phones. Scince Fiction movies should already portrait that meme :)

I think it is this single aspect which could become (or not) the core competence of Light.

Link | Posted on Apr 15, 2017 at 20:23 UTC
On article Light's L16 camera is in final stages of testing (300 comments in total)
In reply to:

noisephotographer: I think it would be better if the Light L16 was also a smartphone. Not much is missing to be a modern smartphone(it has already a 5,0" touchscreen, Snapdragon 820, large battery, Android, ..). I guess many people who buy the L16 would use it as their smartphone if you could telephone with it. The target group would be larger. If it was a smartphone, it would justify the 1700$ a little bit more.

Maybe Light does not exclude to be aquired by their neighbors Apple or Google. The latter is already an investor.

However, the more straigthtforward smartphone approach would be a 3x3, 4x4 or 5x5 array of the existing (read minuscule) camera modules.

Link | Posted on Apr 15, 2017 at 20:07 UTC
On article Light's L16 camera is in final stages of testing (300 comments in total)
In reply to:

webrunner5: Wow, this thing can take some darn nice pictures. A few tweeks and they are going to have something good here! Color is a bit funky, but that can and will change I bet.

This gallery below is pretty impressive right now.

https://light.co/gallery

I recognized its Cuba from that single church picture. Cuba isn't small. Somehow everybody is taking photos from the same spots ... ;)

Link | Posted on Apr 15, 2017 at 20:00 UTC
In reply to:

Pete_W: Nikkei seems to be getting a reputation for publishing exaggerated and fabricated stories. First about Panasonic and now about Ricoh. Who's next??

I can't read the Japanese soul, although I know a few Japanese friends and business contacts. That's true. Still if really there wasn't anything true to the story, I would have expected no statement at all. Or a statement like we don't comment rumours (when asked by journalists).

Link | Posted on Apr 14, 2017 at 10:55 UTC
In reply to:

Pete_W: Nikkei seems to be getting a reputation for publishing exaggerated and fabricated stories. First about Panasonic and now about Ricoh. Who's next??

True, but the wording of both denials is telling too: "we never said so officially" (in similiar words). That's the weakest form of denial I can possibly think of.

Link | Posted on Apr 14, 2017 at 10:46 UTC
In reply to:

falconeyes: No camera vendor is in safe harbour this day and age.
Maybe Canon, but not Nikon, not Sony. And certainly not Panasonic, Olympus, Pentax or Fuji. The Nikkei report is nothing but a reminder of that.

The report however does seem to contain a real piece of information: Ricoh IS making a loss in camera business. Large enough a loss to worry about.

You are right, the news may be unrelated to Pentax, actually. We just don' know.

Link | Posted on Apr 14, 2017 at 10:42 UTC

No camera vendor is in safe harbour this day and age.
Maybe Canon, but not Nikon, not Sony. And certainly not Panasonic, Olympus, Pentax or Fuji. The Nikkei report is nothing but a reminder of that.

The report however does seem to contain a real piece of information: Ricoh IS making a loss in camera business. Large enough a loss to worry about.

Link | Posted on Apr 13, 2017 at 20:13 UTC as 16th comment | 2 replies
On article Nikon D7500: What you need to know (533 comments in total)

If I understand correctly:

Now, the D5600 is Nikon's DX camera for landscape shooters, D500 for sports shooters. And the D7500 is a product cheap to make but with no use case left.

Link | Posted on Apr 12, 2017 at 21:55 UTC as 45th comment | 3 replies

There is MUCH more to the story!
For a broader perspective, please read
-> http://www.microstockdiaries.com/dmitry-shironosov.html
It is an especially interesting read for pro photographers.

Link | Posted on Apr 8, 2017 at 09:03 UTC as 52nd comment

Interestngly, the first image from their "Try our samples" bar (the one with keywords "business, smiling, woman") scores 0.0%. It looks like the typical stock photo though. So, it must be telling us something about how EA rated photos in the training.

The keywording is impressive. Fair enough, they had a large training set to fetch keywords from. Still, their feature vector generation must be useful. Which may be their real asset. Too sad they did not publish about their feature vector creation algorithm.

Link | Posted on Apr 8, 2017 at 08:51 UTC as 53rd comment | 1 reply
Total: 1047, showing: 21 – 40
« First‹ Previous12345Next ›Last »