Jon Rty

Lives in Switzerland Switzerland
Joined on May 2, 2009

Comments

Total: 80, showing: 1 – 20
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In reply to:

DPPMetro: So Sigma feels only adding a gasket to the mount is "weather-sealing"?

No, they think it offers a degree of weather-sealing. From the article:

"The only seal is around the lens mount. It’s not a perfect weather-proofing like our Sports series. The 150-600mm for instance has sealing everywhere, on the focus ring and zoom ring."

Link | Posted on Feb 27, 2017 at 12:24 UTC
In reply to:

Daft Punk: There is one area of questions I am disappointed you did not ask Sigma.

How can they respond to the problems in making sure their lenses' AF works with the latest cameras? We know that Canon users sometimes have problems, for example, with Sigma ART lenses on 5D4 say, because Canon (understandably) dont make it easy for Sigma to know all the coding needed to get camera and lens talking to each other.

I guess Sigma have their unique dock set up to allow AF fine tuning. But I still know of Canon users who have returned ART 35mm for example, because they have AF inconsistencies they dont get with OEM lenses.

How can Sigma deal with this?

You can rewrite the lens firmware with the dock. Why would you assume that a firmware update could not deal with inconsistency problems?

Link | Posted on Feb 27, 2017 at 12:14 UTC
In reply to:

Daft Punk: There is one area of questions I am disappointed you did not ask Sigma.

How can they respond to the problems in making sure their lenses' AF works with the latest cameras? We know that Canon users sometimes have problems, for example, with Sigma ART lenses on 5D4 say, because Canon (understandably) dont make it easy for Sigma to know all the coding needed to get camera and lens talking to each other.

I guess Sigma have their unique dock set up to allow AF fine tuning. But I still know of Canon users who have returned ART 35mm for example, because they have AF inconsistencies they dont get with OEM lenses.

How can Sigma deal with this?

They deal with it by getting their hands on Nikon and Canon cameras, looking at how their auto-focus works, and then patching the existing Sigma lenses to support the auto-focus systems. As it is reverse-engineering, it's not perfect, but it works well enough more often than not. Nowadays, the USB Dock allows for users to patch their lens firmware at home instead of having to send their lenses to Sigma for patching.

Link | Posted on Feb 27, 2017 at 10:56 UTC
On article Tiny fps1000 high-speed camera boasts 18,500fps (117 comments in total)
In reply to:

zonoskar: 18000 fps at 64x64 pixels. Very usefull. NOT And only 200 fps at 1080p, you'd almost better get a Gopro Hero 4 (but that's only 120 fps at 1080p).

A GoPro, with a fixed lens, middling codec and poor controls isn't at going for the same customers as a programmable camera that offers full exposure and focus control, RAW recording and interchangeable lenses. Horses for courses.

Link | Posted on Oct 9, 2014 at 11:48 UTC
On article Tiny fps1000 high-speed camera boasts 18,500fps (117 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.

The iPhone doesn't really offer nearly enough control to be a flexible tool to use. The fps1000 has a interchangeble mount, full exposure and focus control and records RAW.

Link | Posted on Oct 9, 2014 at 11:43 UTC
On article Drone films SpaceX rocket launch and landing (73 comments in total)
In reply to:

Roland Karlsson: So - what is that rocket doing?

Lifting a little and then landing?

When is that capability useful?

Paul,

Got a source for that? They tested the Falcon 9R during a mission to the ISS already, and were apparently successful.

"SpaceX pricing and payload specifications published for the non-reusable Falcon 9 v1.1 rocket as of March 2014 actually include about 30 percent more performance than the published price list indicates; the additional performance is reserved for SpaceX to do reusability booster demonstration flight tests while still achieving the specified payloads for customers. Once all engineering changes to support reusability and recovery are made and testing is successful, SpaceX expects to have room to increase the payload performance for the Falcon 9-R, or decrease launch price, or both."

So 30% during testing, less once it's in regular use.

Link | Posted on Apr 23, 2014 at 21:13 UTC
On article Drone films SpaceX rocket launch and landing (73 comments in total)
In reply to:

Roland Karlsson: So - what is that rocket doing?

Lifting a little and then landing?

When is that capability useful?

Space X is testing the rockets autonomous landing capability. Once ready, it'll be used to land the boosters once they detach at 80 000m during a launch. By landing the rockets instead of dumping them in to the ocean like you conventionally do, they'll be able to reuse the rockets after refurbishing them. This'll drastically cut down on the cost of a launch, as you don't have to re-build the boosters after each launch.

Link | Posted on Apr 23, 2014 at 15:03 UTC
On article Sigma 50mm F1.4 DG HSM review (592 comments in total)
In reply to:

Edymagno: Too bad they didn't test it with a AA-less 36mp sensor. Kudos to Sigma but disappointed at the test. Sorry, not useful for me.
Sherpas anyone?

DxO will test the lens with the D800E once they get there. If you check their site, they end up testing each lens with dozens of bodies.

Link | Posted on Apr 17, 2014 at 18:25 UTC
In reply to:

RStyga: I think Pentax 645D is still the cost/performance king *by far*.

Saying that these tweener size MF cameras are a completely different from 135 DSLRs make as much sense as saying that 135 is completely different from APS-C. There's a small improvement, but it's nowhere near in proportion to price. Diminishing returns and all that. And this is before you factor in just how outdated larger than 135 sensor are. CMOS in 2014, really?

Link | Posted on Mar 4, 2014 at 15:28 UTC
On article Blackmagic Production Camera 4K available now for $3000 (111 comments in total)
In reply to:

mpgxsvcd: Whoever does the first GH4 vs. BM 4K camera shootout is going to get a lot of attention.

The Black Magic records 10-bit 4:2:2 ProRes internally at launch, and will get RAW recording later in a firmware update. The GH4 records 8-bit 4:2:0 internally, requires an external recorder to get 10-bit 4:2:2, and has no way to record RAW. So there really won't be any question which will offer the better image quality in good light. Now, as a run-and-gun or low-light solution, the GH4 will almost certainly be better.

Link | Posted on Feb 11, 2014 at 09:44 UTC
On article Integrating the Apple MacBook Air into a pro workflow (345 comments in total)
In reply to:

FoveonPureView: How about comparing the difference in workflow experience between using a 2013-MacBook Air 13.3" 1440x900, IPS-screen, aluminium casing, Intel Core i7-4650U, 2x 1.70GHz, 8GB RAM, 512GB SSD, 1700€, 1.35kg
to, say a
Fujitsu Lifebook U904, 14" 3200x1800, Multi-Touch IGZO-screen, magnesium casing, Intel Core i7-4600U / 2x 2.10GHz, 10GB RAM, 256GB SSD, GB-Lan, 1800€, 1.39kg?

The Gigabyte isn't really a alternative to the Macbook Pro Retina. Lower resolution, lower gamut, lower contrast screen with poorer view angles; plastic construction; *1/3* of the battery runtime, and throttling issues. It's a good laptop in its own right, but it's a completely different type of computer, sacrificing battery life, screen-, build- and haptic- quality for higher performance and a lower price point.

Link | Posted on Jan 14, 2014 at 10:42 UTC
On article Integrating the Apple MacBook Air into a pro workflow (345 comments in total)
In reply to:

FoveonPureView: How about comparing the difference in workflow experience between using a 2013-MacBook Air 13.3" 1440x900, IPS-screen, aluminium casing, Intel Core i7-4650U, 2x 1.70GHz, 8GB RAM, 512GB SSD, 1700€, 1.35kg
to, say a
Fujitsu Lifebook U904, 14" 3200x1800, Multi-Touch IGZO-screen, magnesium casing, Intel Core i7-4600U / 2x 2.10GHz, 10GB RAM, 256GB SSD, GB-Lan, 1800€, 1.39kg?

How about comparing the Lifebook with the Macbook Pro Retina 13"?:

13" 2560x1600, 100% sRGB screen; Intel i5 2x2.4GHz CPU with Iris 5100 GPU; 16GB RAM; 700MB/s, 256GB PCI-E SSD; 1300Mb/s, 802.11ac WLAN; 2xThunderbolt 2.0; 1700€; 71.8 Wh battery; 1.57Kg

Horses for courses, right? Carry 200 grams more, and have a laptop that's as good as universally higher specced.

Link | Posted on Jan 14, 2014 at 08:56 UTC
In reply to:

Babka08: I'm glad Canon chose to go 35mm f/2 with IS for the same money.

"Meanwhile the EF 35mm f/2 IS USM features an all-new optical design, and includes image stabilization and an ultrasonic focus motor. It will be in on sale early December for $849.99 / £799.99 / €849. Both lenses will work on full frame and APS-C cameras."

http://www.dpreview.com/news/2012/11/06/canon-announces-ef-24-70mm-f4l-is-usm-and-ef-35mm-f2-is-usm-lenses

849.99$ =! 599$. Launch price vs street price.

Link | Posted on Jan 7, 2014 at 09:32 UTC
On article Tamron to develop 150-600mm F5-6.3 ultra-telephoto zoom (193 comments in total)
In reply to:

tommy leong: yes
and the AF speed will be only suitable for static objects.

Take a look at Tamrons USD lenses. They're far form slow.

Link | Posted on Nov 7, 2013 at 11:28 UTC
On article Tamron to develop 150-600mm F5-6.3 ultra-telephoto zoom (193 comments in total)
In reply to:

J.K.T.: As someone shooting with Canon crop bodies I really would have appreciated f/5.6 at tele end - even at the price of somewhat shorter max length. Otherwise...

The lens will autofocus, as does other F/6.3 lenses, thanks to a little trickery in reporting the aperture.

Link | Posted on Nov 7, 2013 at 11:23 UTC
In reply to:

Peter Lacus: Does anybody know if they still use some sort of copy protection? Because if so, I'm not gonna install even a trial version. I just hate to be treated as a potential thief.

So you only use software without any sort of copy-protection? Narrows down the list quite a bit.

Link | Posted on Oct 23, 2013 at 16:26 UTC
In reply to:

Mirrorless Crusader: Hmm, I could buy a huge heavy 24-70mm f/2.8 zoom from CANIKON for $2500, or a lightweight portable 24-80mm f/2.8 for $1000 from OLYMPUS. Tough decision, there.

You can get F/1.4 zooms for m43? And they're portable? If you're satisfied by F/5.6 on FF, and don't need the extra DR andvresolution at base ISO, then you can get the same on m43. But you tried to claim that you'd need a 2400€ F/2.8 zoom for FF to match the Oly, something's that's blatantly false. Oh, and I wouldn't exactly call the D600 stripped down.

Link | Posted on Sep 11, 2013 at 06:18 UTC
In reply to:

Mirrorless Crusader: Hmm, I could buy a huge heavy 24-70mm f/2.8 zoom from CANIKON for $2500, or a lightweight portable 24-80mm f/2.8 for $1000 from OLYMPUS. Tough decision, there.

If your goals is to get the "same visually discernible image quality at sub-mural size print and web outputs", then why would you get a F/2.8 zoom for FF? Just get a F/5.6, shoot with two stops higher ISO, and hey presto, same visually discernible image quality what DR, SNR, DoF, you name it, is concerned. Or you can be a bigshot and get a Tamron 24-70mm F/2.8 VC and go toe to toe with m43 F/1.4 glass.

Link | Posted on Sep 10, 2013 at 10:05 UTC
On article Nokia EOS rumors surge (84 comments in total)
In reply to:

Photog74: Windows Phone 8 does sound better than Symbian but it's still no Android...

Thank god for that.

Link | Posted on Jun 8, 2013 at 07:23 UTC
Total: 80, showing: 1 – 20
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