digiart

Lives in Portugal Aveiro, Portugal
Works as a webdesigner
Has a website at -
Joined on Feb 13, 2006
About me:

Amateur photographer
Equipment:

Cameras:
-------------
Nikon D50
Panasonic Lumix FZ-20
Nikon Coolpix 4300
Pentax MZ-50

Lenses:
-----------
Nikon 50 f1.8 D
Tamron 11-17 Di - II
Tamron 70-300 Di - II
Sigma 18-50 f3.5 - f5.6
Sigma 55-200 f4 - f5.6
Sigma 28-200 f/3.5-5.6
Sigma 70-300 f4-5.6 DL
Pentax FA 50 f/1.7

Comments

Total: 80, showing: 1 – 20
« First‹ Previous1234Next ›Last »

God help him/her. Hope the pay is good enough to deal with the Prozac bill!

Link | Posted on Mar 20, 2017 at 19:01 UTC as 25th comment
On article Erez Marom: On causality in landscape photography (107 comments in total)

Beautiful pics!

Link | Posted on Mar 18, 2017 at 21:05 UTC as 25th comment

Some colours in the eye are wrong in the Guetzli encoded sample (third image). Colour accuracy is more important than a few % more compression IMHO.

Link | Posted on Mar 18, 2017 at 21:00 UTC as 19th comment | 4 replies
In reply to:

digiart: Nikon is braking the compatibility of it's DSLR gear time after time. First they dropped the built-in AF motor in the D3XXX and D5XXX range. Then, camera firmware updates stopped third party batteries from working. Now, they release AF-P lenses that don't work with almost all of Nikon bodies, denying it's loyal customers the benefits of AF-P. I feel this is like an abusive relationship. So infuriating! I don't think I will buy Nikon gear again.

I bet they can't make AF-P lenses to work on most of the camera bodies because it probably draws more power than what the cameras can deliver. If that's the case, it was bad decision to design without accounting for use of different type of AF motor.

A bigger (brighter) lens does not necessarily mean it will draw more power. The AF on these usually don't move the big front element but a smaller element or group further back. The info I have is that stepper motors require more power, hence my initial comment. But you make a fair point, and if it's not a technical issue that prevents compatibility of AF-P lenses with most of Nikon DSLR bodies it means it's a commercial decision, which is even worse!

Maybe DPR could ask Nikon if there is a technical reason why so many of their cameras can't be updated to support the new AF-P lenses?

Link | Posted on Mar 14, 2017 at 14:09 UTC

Nikon is braking the compatibility of it's DSLR gear time after time. First they dropped the built-in AF motor in the D3XXX and D5XXX range. Then, camera firmware updates stopped third party batteries from working. Now, they release AF-P lenses that don't work with almost all of Nikon bodies, denying it's loyal customers the benefits of AF-P. I feel this is like an abusive relationship. So infuriating! I don't think I will buy Nikon gear again.

I bet they can't make AF-P lenses to work on most of the camera bodies because it probably draws more power than what the cameras can deliver. If that's the case, it was bad decision to design without accounting for use of different type of AF motor.

Link | Posted on Mar 6, 2017 at 21:55 UTC as 4th comment | 2 replies

When a cheap (but good) Nikon f1.8 30mm or 28mm DX lens?
The Nikkor 35mm f1.8 DX is good and cheap, but is 52.5mm on DX. If you have a fast 50mm the 35mm is not compelling enough.
Nikon please give us a 30mm f1.8 DX!

Link | Posted on Oct 20, 2015 at 20:21 UTC as 19th comment | 2 replies

The price seems very reasonable considering the many special glass elements and superior build quality.

Link | Posted on Oct 19, 2015 at 11:02 UTC as 9th comment
In reply to:

agentul: men willing to risk their lives to do something great. this is why i doubt we will send astronauts to Mars: the western society is so risk-averse that they will demand 100% possibility of safe return. and no one will dare risk a mission failure.

so probably India or China will go there first.

"the western society is so risk-averse that they will demand 100% possibility of safe return"

The Space Shuttle program was anything but risk-free and that did not stop the USA to take that risk. There will never be a 100% risk-free trip to Mars, but money will be the biggest obstacle for maned missions.

Link | Posted on Oct 7, 2015 at 00:04 UTC

That should keep the Moon landing hoax loonies entertained for a while... ;)

Link | Posted on Oct 6, 2015 at 23:56 UTC as 23rd comment | 4 replies

This is HUGE! It's the final nail in HDD's coffin.
But what would be great was a quantum leap in sensor technology.

Link | Posted on Jul 29, 2015 at 20:03 UTC as 11th comment | 7 replies

Humor... the most powerful of all weapons! :)

Link | Posted on Jul 14, 2015 at 19:09 UTC as 73rd comment
On article Sony rides wave of US Mirrorless sales surge (727 comments in total)
In reply to:

InTheMist: I've been down on mirrorless because my first was an x100s which is a slow piece of junk.

Two years later, I tried a Nikon 1. All I can say is that if Nikon was able to use the same technology in a camera with a large sensor, that's not dog-ugly, they would be on to something special. It's QUICK!

Nikon (and Canon) can make such a camera today. The problem is, they are the market leaders and market leaders tend to innovate less. Also, the bigger the company the more new products decisions are dictated by the "bean counters". That's why most innovative cameras are not coming from Canon or Nikon but from Olympus, Pentax/Ricoh, Fuji, etc.

Link | Posted on Jun 4, 2015 at 19:54 UTC

If the protective glass over the sensor is coated (which it probably is) this may be caused by a problem in the coating process. This seems to me a more plausible explanation than a problem in the adhesives used to put the layers of glass together.

Link | Posted on May 3, 2015 at 13:37 UTC as 18th comment | 1 reply
On article Massive $33,500 2450mm f/8 NASA lens surfaces on eBay (235 comments in total)
In reply to:

Erick L: Keeping my money for the Hubble auction.

I hope you don't mind "some" scorching :)

Link | Posted on Apr 29, 2015 at 17:08 UTC
In reply to:

Karroly: You forget to say that increasing the diameter of the "tubes" is like waiting longer under the rain : this will increase and make more equal the number of raindrops caught by each tube, thus reducing the "signal-to-noise" ratio. For sensors, it means, putting aside electronic noise, bigger pixels will catch more photons and average the random nature of light you are talking about here.

This is why, given the same resolution, a big sensor with big pixels will ALWAYS be better in (extremely ?) low light than a small sensor, even though there were no electronic (or thermal) noise at all...

However, in practice, the true question is, and your article does not give an answer, under which pixel size and scene brightness, does a pixel catch too few photons so that the difference between adjacent pixels becomes noticable ?
Is this "noise" greater or smaller than the electronic or thermal noise ?
In other terms, do we really have to care with the random nature of photons with today sensors ?

"But there are more of the smaller pixels, so they can be combined, thus negating the big pixel advantage as long as the noise is scaled adequately."

If pixels where combined, that would negate the advantage of increased pixel count as it would decrease resolution.

Also, each pixel is amplified individually in the sensor and it's this first amplification step that contributes the most to the sensors SNR. So, "combining" smaller pixels will always result in lower SNR than using a sensor with less but bigger pixels, assuming sensors are of same generation (same type, process).

Link | Posted on Apr 28, 2015 at 20:53 UTC
In reply to:

digiart: Very informative article. It explains very well what we know from experience. Thank you!

P.S.
It would be excellent if in the reviews DPR tested each camera to find out what is the ISO setting that gives you the best dynamic range.

@feraudy,
Because it's not always the lowest ISO setting, that is why testing (and sharing) that info in the reviews would be valuable.

Link | Posted on Apr 28, 2015 at 09:32 UTC
In reply to:

naththo: What about the sensor heating issue problem especially in Pentax and Sony Mirrorless? That would have increase noise significantly especially Australia is a hot country not a cold country at all.

I think it will be discussed in part 2. IMO this can be an issue in dim lit scenes when using Live View or right after using Live View for some time. Not tested though.

Link | Posted on Apr 27, 2015 at 17:18 UTC

Very informative article. It explains very well what we know from experience. Thank you!

P.S.
It would be excellent if in the reviews DPR tested each camera to find out what is the ISO setting that gives you the best dynamic range.

Link | Posted on Apr 27, 2015 at 17:12 UTC as 176th comment | 2 replies
On article Apple patent hints at super resolution camera mode (77 comments in total)

I may be wrong but it looks like Apple is yet again copying other companies technology...

Link | Posted on Apr 23, 2015 at 17:36 UTC as 19th comment | 12 replies
Total: 80, showing: 1 – 20
« First‹ Previous1234Next ›Last »