Lives in Germany Munich, Germany
Works as a Engineer
Joined on Nov 1, 2006


Total: 49, showing: 1 – 20
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In reply to:

Peiasdf: Why? How much can be out of focus on a 1/2.8" sensor paired with 26mm lens that you need to step down?

It depends on the distance!

Link | Posted on Dec 2, 2017 at 23:14 UTC

Some time a go, I compared a cheap (and I mean considerably cheaper than all those tested by LR) with my somewhat older B&W CPL, on my Sony A77 II with various lenses. On low and medium focal lengths I did not see a difference, but starting from around 150 mm the cheaper filter added visible blur. At 400 mm - my longest lens - the difference was very obvious. The cheap filter deteriorated image quality considerably, the B&W barely noticeable.

Link | Posted on Sep 19, 2017 at 17:27 UTC as 16th comment | 2 replies
In reply to:

santamonica812: Given the high price, I'd be surprised if almost everyone didn't go for the Spark (or, for a few hundred more, the Much better Mavic.)

[Now that there's a new Mavic in town; I would not be shocked to see a small price reduction for the original, either in the Fall, or sometime around the pre-Christmas buying season.]

I could not see where they claim 4K 60p, quite on the contrary - they write HD video at 60 fps.

Link | Posted on Sep 3, 2017 at 21:46 UTC
On article Sony FE 100mm F2.8 STF gallery and first impressions (316 comments in total)

Quite obviously, this lens was made specifically for all those who don't like the clearly circular (or ellipsoid) blur-blobs that traditional lenses produce.

Therefore I don't understand that exactly this specifically designed-in characteristic is criticized by some here. To all of those who did: stick with the traditional lenses that you already have, but let us others enjoy the STF's different character.

I wonder who will introduce the first lens with changeable APD filters. That would allow to select the amount of smoothness depending on the chosen aperture. I would happily sacrifice AF for this feature (and a more moderate price).

Link | Posted on May 9, 2017 at 12:15 UTC as 75th comment | 1 reply
On article Atomos introduces Ninja Inferno off-camera recorder (63 comments in total)

I thought the GH5 can output 4:2:2 10-bit only up to 30p? ==> https://www.dpreview.com/products/panasonic/slrs/panasonic_dcgh5/specifications

Link | Posted on Mar 24, 2017 at 20:47 UTC as 9th comment | 1 reply
On article Mobile Speed: Portable SSDs for photographers (205 comments in total)

It's nice to see the possible read and write speeds here in comparison, but let's not forget that the speed you get always depends also on the computer you connect an external SSD to.

By far not all are capable of the higher speeds listed, not even all with internal SSDs!

Link | Posted on Dec 2, 2016 at 16:20 UTC as 36th comment
On article Mobile Speed: Portable SSDs for photographers (205 comments in total)
In reply to:

Terry1010: I am looking forward to product similar to WD My Passport, but with SSD. Which will be much faster and reliable during transportation.

Why big suppliers, eg Sandisk, Samsung etc have not spot this need?

I don't quite understand - Sandisk and Samsung do have portable SSD products. What is so special about the WD My Passport?

Link | Posted on Dec 2, 2016 at 16:16 UTC
On article 1.4 and More: Canon EF 35mm F1.4L II comparison (250 comments in total)

You compare the Canon with it's own older brother and 2 Sigma lenses - even one with a Nikon mount -, on a Sony A7r II and then come to the conclusion that "This is the best 35mm F1.4 prime currently available", without even mentioning that Sony also has a very recent, top notch 35/1.4, the Zeiss T* FE 35mm F1.4 ZA

Does it not exist for you??? Or you think nobody is interested in this comparison???

Link | Posted on Dec 2, 2016 at 15:49 UTC as 6th comment | 2 replies

I downloaded this new VLC Version in the hope to find a better 360picture viewer (currently use FSPViewer64 and DevalVR). But I was disappointed, it didn't display any of my equirectangular JPGs, and even when I downloaded the Mountain_360.jpg that is offered as example on videolan.org, it played it only for a few moments, then the VLC window went black.

Link | Posted on Nov 28, 2016 at 22:56 UTC as 7th comment | 1 reply
On article Google Panoramio to shut down on November 4 (60 comments in total)
In reply to:

MikeFairbanks: They've actually quit a lot of projects they started.

Another one was Google desktop.

Link | Posted on Oct 12, 2016 at 15:03 UTC
In reply to:

///M: no specs on Amazon, no specs here, did someone randomly pick a generic device on Amazon to fill some space on the DPreview page? Was there a press release, an event at a trade show, a product rep contacted the writer, the writer found this at the local walmart? Who, what, where and why are still important.

Before they tear down this thing to see what it's made from, DPreview should rather measure light output and distribution, color temp and CRI. I don't mind buying old technology offered for a good price, when the quality is good.

An anouncement of this "quality" is really not DPreview style, and very disappointing. Color box light, 93% efficiency ... haha

Link | Posted on Sep 3, 2016 at 23:18 UTC
In reply to:

2JoeA7R2: No VR, no IBIS. No deal!!!

If your user name is program (i.e. you own a Sony A7R2), where is your problem? The camera has a built-in IBIS which works also with 3rd party lenses.

Link | Posted on Jul 27, 2016 at 21:14 UTC
On article DxOMark Mobile Report: Lenovo Moto G Plus (15 comments in total)

Did I overlook something, or is there indeed no specification of the focal length, or the angle of view that the built-in lens has?

Link | Posted on May 20, 2016 at 09:24 UTC as 2nd comment
In reply to:

wus: IMHO it doesn't make a lot of sense to shoot the earth from outer space in 3D, as it is far too far away for any 3D effect to become noticeable. 3D only works in the short to medium distances.

I agree views inside the ISS are a perfect opportunity for 3D, but the headline is "ISS astronauts shoot 3D movie of planet Earth". If they mix 3D shots from inside the ISS, it will distract from the "Beautiful Planet", just like the noisy wow's that dccdp rants about.

I'm sure it's a great movie - all IMAX 3D movies that I have seen so far were phantastic - I'm just a little afraid that IMAX put the emphasis on making it a commercial success, sacrificing, in part, the message "save the beauty of this planet for our future".

Link | Posted on May 13, 2016 at 16:44 UTC

IMHO it doesn't make a lot of sense to shoot the earth from outer space in 3D, as it is far too far away for any 3D effect to become noticeable. 3D only works in the short to medium distances.

Link | Posted on May 8, 2016 at 19:43 UTC as 8th comment | 2 replies
In reply to:

Eric Calabros: and my TV can't even play 60p 4k

And even the latest ones can't play 120p UHD, simply because the interface used in TVs isn't fast enough - even the latest iteration of HDMI 2.0 stops at 60p for 4K with HDR.

But it's good to see there is at least a processor which can encode UHD with 60p and more. Unfortunately they don't say anything about compression ratio / output bitrate, or the kind of memory card interface needed to record the resulting video stream.

Anyway, it will be interesting to see how long it will take until this processor (or another one) appears in a consumer camera that can shoot 4K 60p HDR, or even 120p.

Link | Posted on Jan 7, 2016 at 14:19 UTC
In reply to:

Francis Sawyer: WHAT A JOKE. They act as though bit depth is the biggest problem. IT'S NOT.

The problem is compression level, which is glaringly absent from this sham of a "spec." There's no mention of minimum bitrate or compression scheme.

This means we're still facing a future of fraudulent "4K" or "UHD" that has no more real resolution than a cell-phone video, especially when there's movement in the image.

Low-bitrate, interframe-compressed junk is just that: JUNK.

Agree. And the other spec that I'm missing is a higher resolution in time, i.e. higher frame rate. And also for 3D / Stereo movies! And HDMI 2.0 isn't fast enough for all of this ...

I'm afraid there is still a long way to go before we see all this implemented, on affordable consumer devices.

Link | Posted on Jan 7, 2016 at 01:44 UTC
In reply to:

Scott Eaton: I recently helped install a large 3x3 matrix video all in a night club, and if you want to see how limited 1080p is you should see Sunday NFL on that thing. Totally dreadfull - 4k/8k can't come fast enough.

The 4k/8k debate has three entirely distinct debates; aquisition, broadcast, and display. Display is already there, and home TVs are getting big enough to need the extra resolution. Broadcast is almost entirely political - the bandwidth is there, but also lobbiests pushing for cartels on data bandwidth.

Aquisition is a different debate entirely. I agree with the skeptics here in that whats the point in doing 4k pro-sumer if we can't do 1080p correctly and have to toss 80% of our chroma information to keep file sizes practical? I still think if we have 5 or even 6 color sensors with more discrete luminance sensitivity we would have better data to start with and could be upscaled to the same quality level. The samples of 4k video I have show outstanding detail, but little else.

Hello Scott, would you be so kind to tell me which 8K display is available today?

Link | Posted on Dec 9, 2015 at 08:38 UTC
In reply to:

zzzxtreme: i'm thinking the camera would support 2 memory cards to be able to handle such huge data

In my opinion, that should include a fragmented memory, that hasn't been low level formatted right before use like cameramemoryspeed did - or would you want to format your SD card every time before you start shooting video, just to make sure it records your video smoothly???

Also, I find it interesting that the fastest SD card in this "test", the SanDisk Extreme Pro 95MB/s 32GB, which is only of the UHS-I type, averages 75 MB/s, while SanDisk's UHS-II card, the Extreme Pro 280MB/s UHS-II 32GB, which should be around 3 times faster according to SanDisk, is actually only about half as fast.

How can that be???

Link | Posted on Dec 8, 2015 at 14:12 UTC
In reply to:

zzzxtreme: i'm thinking the camera would support 2 memory cards to be able to handle such huge data

Thanks for the link, otto! Basically it confirms what I wrote: in real world measurements, SD card write speeds fall far behind the silly "up to" statements that manufacturers publish.

Now I don't quite understand why you picked a camera that's rather stills photography centric, and doesn't even shoot 4K.

The website states "average" write speeds, for burst stills photography. "Average" means that some samples were faster, while others were slower.

However, for continuous video shooting, an "average" isn't enough. The SD card interface must be capable to maintain the required write speed at all times, under all cirumstances. For video shooting, we need to know the minimum speed that the card (and the camera's card interface) can maintain, not the average.

Link | Posted on Dec 8, 2015 at 14:11 UTC
Total: 49, showing: 1 – 20
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