digiart

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

Amateur photographer
Equipment:

Cameras:
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Nikon D50, D5100

Lenses:
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Nikon 50 f1.8 D
Nikon 18-105 VR
Nikon 55-200 VRII
Tamron 11-17 Di - II
Tamron 70-300 Di - II
Sigma 18-50 f3.5 - f5.6

Comments

Total: 256, showing: 1 – 20
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Well, it's this or buying a new computer every 2/3 years! Now I can read some jokes while I wait for Photoshop to process images in my obsolete computers :)
Let's hope it's fully compatible!

Link | Posted on Sep 1, 2020 at 12:20 UTC as 10th comment

Android stock camera app has been lousy for too long! No way for the user to change the compression ratio of jpg's freely in the UI. The "best picture quality" still has too much compression. Something really silly when you can buy 64GB-256GB phones and memory cards for little money. Many third party apps take better pictures simply because they can bypass this stupid limitation and use less compression.

Link | Posted on Aug 21, 2020 at 09:48 UTC as 25th comment | 2 replies

In scene 2, 7Artisans is sharper in the corners and Leica is slightly sharper in the center. Assuming focusing was spot on in both shoots, it's surprising given the huge price difference.
@DPR:
Please publish more reviews and comparisons between cheap and "expensive" lenses. Very useful to amateurs on a budget.

Link | Posted on Aug 19, 2020 at 10:48 UTC as 101st comment | 1 reply
On photo Comet NEOWISE in the Open Challenge challenge (19 comments in total)

Great photo! Love the blue/yellow colours and composition.

Link | Posted on Jul 21, 2020 at 12:13 UTC as 5th comment

I guess this is purely a PR stunt. NASA uses almost exclusively Nikon cameras, so they (Canon) had to find another way to get into Space. But good for them.

Link | Posted on Jun 23, 2020 at 09:23 UTC as 30th comment | 8 replies
On article Nikon P950 sample gallery (97 comments in total)

Disappointing results. All the long focal length shots are blurry. Either no tripod or proper support was used or the lens simply lacks sharpness.

Link | Posted on Apr 20, 2020 at 10:26 UTC as 5th comment | 1 reply

While smartphone makers push to close the gap in image quality between smartphones and ILC cameras, traditional camera brands seem to be "sleeping at the wheel" with much less innovation.

For some years now I have been wondering when we will see a multi-lens "packet of cards size" camera. The thickness of smartphones limits optical quality too much, but a pocket size camera with a "big-ish" 1/1.28-inch sensor and a set of 4-5-6 rotating small lenses (like in the old film and TV cameras) is surely possible. Such a camera could use a small lcd on the back or just an EVF. Imagine being able to quickly switch lenses by simply rotating a small wheel. Such a camera would have image quality not too far from M4/3 but in a much smaller size.

Link | Posted on Mar 27, 2020 at 14:07 UTC as 16th comment | 2 replies
On article Let's talk about Dorothea Lange (118 comments in total)
In reply to:

Michiel953: Let’s talk about DPR evolving into a grown-up
general photography site. Not just gear oriented, but images, opinions, history, socio-cultural (and political) implications of photography.

It’s been going on for a while and I welcome it.

"Let’s talk about DPR evolving into a grown-up general photography site."
I think this has been happening for a while now and is a consequence of the decline of DSLR camera sales. I also welcome it. Cameras and lenses are actually just tools. More important are the subject and the craft of the photographer as they can educate and inspire as is the case with this article.

Link | Posted on Mar 10, 2020 at 12:06 UTC

Amazing photos! Jessica and Christina are doing an amazing work. I watch them through NASA TV. People like them renew my (sometimes faded) hope for a brighter future.

Link | Posted on Feb 1, 2020 at 17:52 UTC as 8th comment
On article Stellina: imaging the sky with a smart telescope (232 comments in total)
In reply to:

digiart: Half the fun of astronomy is for YOU to accomplish getting nice images of celestial bodies. If you want some "robot" to get some half decent images of the night sky then most likely you're not interested in astronomy.

It's a 400mm F5 telescope, it does not say what aperture it is, probably no more than 70 or 80mm. You can get much better results using a DSLR or a dedicated eyepiece astro camera for much less, but I guess this is aimed at someone that knows little or nothing about astronomy and has too much money on their pockets.

@Robert, of course I do. The product image and the article does not make it clear, so it could be smaller than 80mm. It depends if the f ratio is in relation to the sensor. Smaller sensors need smaller aperture lenses to get the same F number. I referred to "probably no more than 70 or 80mm" as a best case scenario and my comment was intended to be more about price/performance because 80mm F5 for 4000 USD is expensive even for an APO with tracking since this is not a pro level instrument.

Link | Posted on Jan 27, 2020 at 00:59 UTC
On article Stellina: imaging the sky with a smart telescope (232 comments in total)

Half the fun of astronomy is for YOU to accomplish getting nice images of celestial bodies. If you want some "robot" to get some half decent images of the night sky then most likely you're not interested in astronomy.

It's a 400mm F5 telescope, it does not say what aperture it is, probably no more than 70 or 80mm. You can get much better results using a DSLR or a dedicated eyepiece astro camera for much less, but I guess this is aimed at someone that knows little or nothing about astronomy and has too much money on their pockets.

Link | Posted on Jan 26, 2020 at 15:32 UTC as 75th comment | 4 replies

The root of the problem is that company bosses don't care!

This happens everywhere, not just in the US. In this case I think the delivery guy is to blame. I presume the box is clearly marked "Handle with care", but even if it isn't he should not be tossing boxes.

I've had several packages delivered with signs of being very poorly handled.

Another issue is delivery guys saying nobody was at home to receive a package when that is not true. I was tracking one delivery and the delivery guy pass in front of my front door, I signal to him and he just ignored me! When the package was finally delivered I could read on the delivery slip that he had written "did not answer the doorbell" as the reason for the unsuccessful delivery. This was an expensive lab instrument and I had paid express delivery!

This sucks and unfortunately is becoming more and more common.

Link | Posted on Nov 20, 2019 at 11:21 UTC as 25th comment | 1 reply

Very good! In a Photoshopped World, always nice to learn "analog"tricks.

Link | Posted on Nov 1, 2019 at 14:13 UTC as 20th comment

"Samsung’s Galaxy S10 #SpaceSelfie satellite left hanging from tree on Michigan farm"

Nice idea/campaign, but incorrect/misleading title. A balloon at 65000 feet is NOT a satellite. 65000 feet high is still part of the atmosphere, not space. Not in orbit, so not a satellite. That's why it only managed to stay up for a few days. High altitude winds can easily bring a balloon down.

Link | Posted on Nov 1, 2019 at 14:03 UTC as 9th comment

What?!!! AirPods?! Apple decides the meaning of "Pro"?!

What does this have to do with photography?!

This has to be one of the strangest DPR articles ever...
Oh... Barney is being ironic maybe? That must be it.
Doh, didn't see it was tagged under HUMOR!

Link | Posted on Oct 29, 2019 at 10:17 UTC as 112th comment
On article Canon's 32MP chip marks the end of the 24MP APS-C era (493 comments in total)
In reply to:

gfrensen: 32MP gives you more details, but only when everything is perfect. There are way more things that gives more or less details like:
1. Focussing: when your focussing is of, details get smeared out and it is of no use
2. Lenses: cheap lenses will give you less details, as they get smeared out
3. Stability: when your move your camera during exposure you smear out details
4. Atmospheric conditions: a little haze can smear out your details
So people should work on their skills when they want more details. And how much more details you can get between a 24MP camera and a 32MP camera, lets see:
24MP: 6000x4000 pixels
32MP: 6960 x 4640
So the 32MP sensor wins by 960x640 pixels or 1.16%
What is that in crop, as cropping is important, isn't it?
Can we digital zoom in 2 times? Eh no, not really, as a 2 times crop will give you a 3480x2320 resolution. It is not more then a 1.16 crop in the end, so from a 500mm lens to a 580 mm lens. WOW that is worth it, isn't it?

@gfresen, 32MP has 33% more pixels and 16% improvement in horizontal and vertical resolution over 24MP. Not 1,16%. Otherwise you are correct.

Link | Posted on Oct 15, 2019 at 13:51 UTC

APS-C Z-mount doesn't make a lot of sense to me. Does this mean all new Nikon DSLR's will be Z-mount? No mirrorless APS-C F-mount coming? Seems like that.

Link | Posted on Oct 10, 2019 at 13:18 UTC as 20th comment | 3 replies
In reply to:

BJL: There’s some misunderstandings in this thread: the telescope has mirrors (three, one convex, and from the University of Arizona as usual) but also needs the lenses for corrections, due to its unusually wide angular field of view:
https://www.lsst.org/about/tel-site/optical_design

Yep, the lenses are correction lenses. And if the correcting lenses need correcting at least the telescope is not in space unlike the Hubble Space Telescope's initial fiasco.

Link | Posted on Oct 3, 2019 at 10:19 UTC
In reply to:

Rodrigo Pasiani: Incredible project. I've just disassembled and reassembled my telescope to clean its 7" primary mirror and I wonder how much harder it is to build this monster. Thanks for sharing the video, it's awesome.

Much, much harder :-)

Link | Posted on Oct 3, 2019 at 10:15 UTC
In reply to:

digiart: A Chinese company claiming BBC reporting is biased and unbalanced? China, where the Tiananmen square uprising is still taboo? Where the Hong Kong protests are not reported on the Chinese media? A country with 24x7 Internet censorship? Of jamming of satellite news (including BBC) broadcasts? That's taking the pi$$, as the Brits say!

This program was about air safety concerns, so it focused on that. I watch BBC News and other news/tech programs like BBC Click and drones and drone technology are depicted in very positive ways.

If I remember correctly, the ex marine was "terrified" when he saw the drone because he knew the "bad guys" where attaching explosives to drones. It doesn't matter the size or speed of the drone. They where guiding the drones WITH EXPLOSIVES at the soldiers! A smaller drone would be harder to detect and shoot down. A bar of C4 the size of a small battery is enough to kill or maim anyone near!

Link | Posted on Jul 9, 2019 at 23:29 UTC
Total: 256, showing: 1 – 20
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