duartix

duartix

Lives in Portugal Lisboa, Portugal
Works as a IT Engineer
Joined on Mar 6, 2007

Comments

Total: 239, showing: 1 – 20
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On 2014 Readers' Polls: The results are in! article (270 comments in total)
In reply to:

newworld666: No real game Changer in the list like the 7DII ? or even QX1 ?

No game changer?
What do you call the LX100 then?

Direct link | Posted on Jan 23, 2015 at 14:39 UTC
On Opinion: The myth of the upgrade path article (1289 comments in total)
In reply to:

razadaz: In recent years photography seems to have become more like Hi-Fi, where many people seem to have become more interested in the fidelity of the system they have than the music they listen to.

Because you can't quantify photography that's where the majority turns to. To something they can measure...

Direct link | Posted on Jan 13, 2015 at 10:25 UTC
On Canon announces five PowerShot compacts article (150 comments in total)

Is Zoom the new Megapixel?
Even if so, there is still a lot to be explained here...

Direct link | Posted on Jan 12, 2015 at 16:30 UTC as 3rd comment

Oh, the convergence!

Direct link | Posted on Jan 6, 2015 at 17:54 UTC as 11th comment
On BPG image format aims to replace JPEGs article (206 comments in total)
In reply to:

TangoMan: Oh no! More skin smoothing!
Examination of all the available images on the image comparison tool show that it works by smoothing away texture. Hair on arms disapear, fruits appear to be made of plastic, and skin... well, it's airbrushed to anormalcy. And white or black dots on green just disappear.
If it catches up, I'm afraid texture will become a thing of the past on most images on the web.

Yes, but...
http://www.dpreview.com/articles/0350654437/bpg-image-format-aims-to-replace-jpegs?comment=2722892690

Direct link | Posted on Dec 16, 2014 at 18:39 UTC
On BPG image format aims to replace JPEGs article (206 comments in total)
In reply to:

Shiranai: JPG2000 wasn't able to replace JPG.
WebP wasn't able to replace JPG, altough its heavily forced by Google.
Have your try, BPG...

Looking at the comparison, I notice JPG2000 is the only format that doesnt completely blur the points on the green band in medium&large quality. If it didn't have the block artifacts it would almost look like the original. BPG looses lots of small details like these points and the texture on his legs. I guess it will behave badly with noisy photos.

Yes, those points are blurred beyond existence in BPG.

But JPEG2000 doesn't do them justice either and makes them look like mosaic artifacts, which leads me to suspect this is highly related to color subsampling.
Anyway, I can live better with those than with severe edge ringing, blocking and aliasing that is present in all but BPG.

It sure looks promising but so did JPEG2000 10 years ago... :(

Direct link | Posted on Dec 16, 2014 at 16:06 UTC
In reply to:

Summi Luchs: My guess is that they will use the sensor-shift to de-Bayer the image. They can move the red, green and blue pixels between the exposures so, that they get a full RGB sample for every pixel (like a Foveon sensor). This would not give us 'true' 40MP resolution, it is simply the same calculus of 'equivalence' Sigma uses for its cameras. (Sigma uses a factor of three, Oly gets a lower factor of equivalence, as the Bayer sensor is not RGB but RGGB).
The gain would be better color information, that what makes Foveon images special.

I don't think they do the same as Hasselblad and other earlier attempts to increase true resolution by sensor movements. Earlier sensors had more blind gaps between the photosites making such techniques meaningful. Newer sensors have a dense array of microlenses (to gather more light per photosite), so there is not much left to sample in between.

A bit of sampling theory...

If they can manage subpixel shifts as it's all pointing to, then it does provide extra spatial resolution, because in reality what you are doing is over sampling.
This means that in theory, the Nyquist frequency limit could be doubled. :)

This is much more significant to final IQ than fully sampling every color channel. Humans have much more perception of spatial resolution than color resolution.

A proof of this is JPEG, in which color subsampling plays an almost as important role as compression.

Direct link | Posted on Dec 5, 2014 at 11:46 UTC
On High-end pocketable compacts 2013 roundup article (264 comments in total)
In reply to:

duartix: What?
Is this really the High-end pocketable compacts meeting?
Why can't I see the Panasonic LX100, then?

Thank you @jdob123.
Seems like I had a different definition of pocket.

Direct link | Posted on Nov 27, 2014 at 15:20 UTC
On High-end pocketable compacts 2013 roundup article (264 comments in total)

What?
Is this really the High-end pocketable compacts meeting?
Why can't I see the Panasonic LX100, then?

Direct link | Posted on Nov 27, 2014 at 14:57 UTC as 39th comment | 5 replies
On Canon announces EOS C100 Mark II article (278 comments in total)
In reply to:

duartix: Ctrl + "F": 4K - 0 of 0
Ctrl + "F": 4:2:2 - 0 of 0
Ctrl + "F": RAW - 0 of 0
Ctrl + "F": neutral - 0 of 0
Ctrl + "F": zebra - 0 of 0
Ctrl + "F": peak - 0 of 0
Ctrl + "F": xlr - 0 of 0
Ctrl + "F": prores - 0 of 0
Ctrl + "F": XAVC - 0 of 0
Ctrl + "F": 10 bit - 0 of 0
Ctrl + "F": 120fps - 0 of 0
Ctrl + "F": price - $5,499

WTF? Is this supposed to be a professional camera??? Because only the price says so!

Thanks for the corrections. I was about to write that either the camera or the press release were nothing near "professional", so it looks like it's a bit of both.
"Neutral" was me trying to check for the existence of an integrated ND filter.

Direct link | Posted on Oct 24, 2014 at 09:50 UTC
On Canon announces EOS C100 Mark II article (278 comments in total)

Ctrl + "F": 4K - 0 of 0
Ctrl + "F": 4:2:2 - 0 of 0
Ctrl + "F": RAW - 0 of 0
Ctrl + "F": neutral - 0 of 0
Ctrl + "F": zebra - 0 of 0
Ctrl + "F": peak - 0 of 0
Ctrl + "F": xlr - 0 of 0
Ctrl + "F": prores - 0 of 0
Ctrl + "F": XAVC - 0 of 0
Ctrl + "F": 10 bit - 0 of 0
Ctrl + "F": 120fps - 0 of 0
Ctrl + "F": price - $5,499

WTF? Is this supposed to be a professional camera??? Because only the price says so!

Direct link | Posted on Oct 23, 2014 at 15:31 UTC as 36th comment | 5 replies
On Tiny fps1000 high-speed camera boasts 18,500fps article (137 comments in total)
In reply to:

Samuel Dilworth: I think the fact an iPhone does 240 fps at 720p resolution is going to put a damper on sales. I know it has advantages over an iPhone – for a start the GOLD does 290 fps at that resolution and the PLATINUM does 550 fps – but my suspicions remain.

Plus, the iPhone must be line skipping like crazy to get 720p240.

Direct link | Posted on Oct 9, 2014 at 14:04 UTC
On Tiny fps1000 high-speed camera boasts 18,500fps article (137 comments in total)

I know he has to source the sensors so that's probably a limitation he can't work around, but I'm not very fond of the odd resolutions apart from 1080p200 and 720p550. And you need to take the highest pledge (999£) for that.

I wouldn't put my money on it before I see some HD and FHD footage. I understand that he's targeting the speed freaks, but if the sensor really delivers he should have showed some Gold and Platinum output even if coming from an early prototype.
Silver right now is not impressing me:

https://s3.amazonaws.com/ksr/assets/002/667/409/63ff8f9c839a6355c9493e1066815395_large.png

Direct link | Posted on Oct 9, 2014 at 13:49 UTC as 35th comment | 3 replies
On 'See Impossible': Canon counts down to... something. article (1658 comments in total)

I see... dead people!

Direct link | Posted on Oct 6, 2014 at 11:24 UTC as 788th comment | 1 reply

The mirrorless bits have got to be the best joke of Photokina 2014.

Direct link | Posted on Sep 24, 2014 at 17:09 UTC as 156th comment
In reply to:

Joe Ogiba: A 4K smartphone with 1" sensor ! That is my next smartphone for sure.

4K @15p doesn't make any sense unless the limit is in the sensor itself, and noting that RX100 III doesn't have 4k might give us a hint.
LG G2 with an older Snapdragon 800 got custom ROMS to introduce 4K, 120fps and HDR Video.

Direct link | Posted on Sep 16, 2014 at 16:30 UTC
On Panasonic unveils Lumix DMC-GM5 with EVF article (46 comments in total)
In reply to:

duartix: No IBIS = no deal.
The shutter limitations (flash synch) and the fixed LCD aren't helping either. I expected a G7 and what we really got was a much improved GM2, no matter the GM5 name.
I guess I'll have to rethink the GX-7 and hopes it's price goes down a bit.

I really need the electronic shutter for for vibration reduction and stealth. And I've been bitten by the GH2 video bug, so it's also unthinkable to get an Olympus at their present state of video codec and binning modes. :(

Direct link | Posted on Sep 16, 2014 at 13:15 UTC
On Panasonic unveils Lumix DMC-GM5 with EVF article (46 comments in total)
In reply to:

duartix: No IBIS = no deal.
The shutter limitations (flash synch) and the fixed LCD aren't helping either. I expected a G7 and what we really got was a much improved GM2, no matter the GM5 name.
I guess I'll have to rethink the GX-7 and hopes it's price goes down a bit.

A GX7 would do fine... Except my hands don't like it. :(
3 axis IBIS is more than enough for me (My Oly E510 was 3 axis and it was amazing)
Unfortunately I need the electronic shutter a lot more more than 5 axis as it won't do much for extreme telephoto.

Direct link | Posted on Sep 16, 2014 at 09:10 UTC
On Panasonic unveils Lumix DMC-GM5 with EVF article (46 comments in total)
In reply to:

mpgxsvcd: I would gladly pay $899 for a 12-37mm F1.7-F2.8 M4/3 lens. Luckily they throw in a free camera body with it if you get the LX100. I can’t fathom buying the GM5 over the LX100 unless they also announce that great lens for m4/3s interchangeable lens cameras.

What lack of flash @thx1138?
The LX100 has a flash, didn't you read the news?

Direct link | Posted on Sep 16, 2014 at 09:07 UTC
On Panasonic unveils Lumix DMC-GM5 with EVF article (46 comments in total)
In reply to:

mpgxsvcd: I would gladly pay $899 for a 12-37mm F1.7-F2.8 M4/3 lens. Luckily they throw in a free camera body with it if you get the LX100. I can’t fathom buying the GM5 over the LX100 unless they also announce that great lens for m4/3s interchangeable lens cameras.

Forget the GM5, it's just a better GM1 when it should have been a swing at the GX7 where it utterly fails.
The LX100 is the bomb of Photokina 2014.

Direct link | Posted on Sep 15, 2014 at 23:20 UTC
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