PIX 2015
steve_hoge

steve_hoge

Lives in United States Boulder, United States
Has a website at http://www.stevehoge.com
Joined on Jun 20, 2005

Comments

Total: 219, showing: 1 – 20
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In reply to:

Henry Richardson: Panasonic also uses lossy compression for its raw files. Here is just one place to get info about that:

http://www.dpreview.com/forums/post/40154581

Huh. From reading that description of Panasonic's RW2 format it sounds like a kind of block-based delta-mod combined with short floating pt encoding of the delta (2 bit exponent+8 bit mantissa). Not surprised that would lead to weird quantization error artifacts.

Direct link | Posted on Sep 2, 2015 at 22:50 UTC
In reply to:

ebjerke: But WHY? I have not seen anyone explain WHY Sony chooses to do this. What benefit is it to them or what benefit to they THINK it offers to continue to do this even though so many complain.

Corollary of the smaller image size is it will potentially write RAW images to the card at a higher frame rate. And if the compression is being done early in the pipeline in hardware then it may increase the RAW buffer capacity too.

Direct link | Posted on Sep 2, 2015 at 22:43 UTC
On Sony Alpha 7R II: Real-world ISO invariance study article (374 comments in total)
In reply to:

www_zeeshan_de: The
DSC09021.arw
is the ISO 100 Image. I just ran it through originalraw. All i can say about the original JPG result is, that the image is massively underexposed. Maybe its underexposed by 7 stops. Boosting that image by 6 to 7 Stops and complaining afterwards doesnt make any sense.

Who on earth takes pictures at EV-7 GENERALLY ??
I never do.
As a photographer its your job to expose the Sensor of you digicam CORRECTLY to get the maximum SNR.

I think Sony did very well here, providing
40 megabytes for each ARW file (lossy)
instead of
70 megabytes for each ARW file (lossless).

Lossless RAW with 70 megabytes may be only useful for a few boosting brightness by EV+7.

But the majority of the photographers can save a lot of Space, and most of them, never take pictures at EV-7.

Lossless ARW with 70 megabytes filesize may be a welcoming option, but it should be optional, but i would never use it.

@falconeyes re:lossy compression alternative algorithms - no measurable loss or no "perceivable" loss? Got links?

Sony probably thought their scheme was imperceptible too until DPR formulated a pathological - though not unreasonable - example.

Direct link | Posted on Sep 1, 2015 at 18:54 UTC
On Sony Alpha 7R II: Real-world ISO invariance study article (374 comments in total)
In reply to:

Dave Oddie: Here is an idea, why doesn't DPR just do a review of the camera and be done with it?

Instead we have extensive discussions of the technology of this particular camera and "reviews" of other cameras that fall far short content-wise of what Phil Askey used to put out years ago.

Yes, I like the idea of an Executive Summary (i.e., "tl;dr" version) - but perhaps that's what the already included Conclusions is about. Maybe feature that Conclusions section up front for those that don't want to skip directly to the end using the pulldown menu?

Direct link | Posted on Sep 1, 2015 at 18:47 UTC
On photo in sample gallery (3 comments in total)
In reply to:

peterwr: Is it just my cheap laptop screen, or is this (and the raw version) hellishly noisy for 200ISO? I'm seeing some blotchiness on the girl's chin, too, especially in the raw. Very disappointing - I had my hands on this camera a few weeks ago and was seriously considering getting one.

I'll take a look on the Mac later, but so far, it's not looking too good.

Yes, that does look noisy, but without downloading the RAW original it's hard to know how much shadow boosting was done in ACR. Note the JPG version in the next frame, with the in-camera noise reduction/smearing applied; that's what the camera's iDynamic processing required to automagically bring up the shadows.

Direct link | Posted on Aug 24, 2015 at 20:24 UTC
On photo in sample gallery (1 comment in total)

Would be useful to know in your Details section what "Picture Style" settings were used for the JPEG versions of these. On the GX7 I've had a hard time figuring out which was the most neutral "un-styled" Picture Style to use for comparison with the RAW versions ("Natural"? or "Standard"?).

(Also confused about the RAW badges you show on the thumbnails - they seem to be attached to the OOC JPG versions.)

Direct link | Posted on Aug 24, 2015 at 20:18 UTC as 1st comment

Would be nice to see the results of pairing these lenses with the OMD EM-5 Mk II body shooting in hi-res (40Mp) mode.

Direct link | Posted on Aug 20, 2015 at 23:39 UTC as 5th comment | 3 replies

Already got my 14-140 updated - you guys are always at least a day behind 43rumors.com with the real news. Of course, they aren't busy covering the latest Donald Rumsfeld pics...

Direct link | Posted on Aug 11, 2015 at 23:43 UTC as 1st comment
In reply to:

steve_hoge: Confused by the statement in the preview: "the FZ300 combines optical and digital image stabilization."

I saw the 5-axis optical stabilization explained in an earlier panel - where does the digital image stabilization come in?

So if I understand correctly, there is NO sensor-based stabilization during video shooting, but processor-based digital image stabilization is combined with the lens' OIS for video. I wonder if the digital stabilization is done in real time - i.e., appears in the EVF and rear display while shooting, or is post-processed in-camera in the background after the clip is finished? (If the latter, then there shouldn't be that great an impediment to extending it to 4K clips.)

Direct link | Posted on Jul 18, 2015 at 19:56 UTC
On The big beast: hands on with the Panasonic Lumix DMC-GX8 article (1253 comments in total)
In reply to:

AshMills: Please can you add a picture of the behemoth next to a DX DSLR to put these comments, and the headline into perspective. Anyone would think it was the size of a dining table.

One of the things I appreciated about the GX7 was the compact size - I do a lot of traveling and it's great that it fit pretty well in my bicycle handlebar bag. I'm kind of bummed that the GX8 has been bulked-up, and don't quite understand why - the sensor should be nearly the same dimensions, but perhaps the fully-rotational display and larger battery required a larger body?

I was concerned also about the weight difference, based on the initial dpreview.com side-by-side comparison which showed over 6 oz. Now it appears (corrected?) that there's only 3 oz difference, which is quite acceptable.

One thing I was originally concerned about on the GX7 was the battery/card door, which is silver-painted plastic and seemed flimsy, though I haven't busted it yet (other of my Panasonics haven't been so lucky). I wonder if they beefed that up for the GX8, what with the weather proofing, etc.?

Direct link | Posted on Jul 17, 2015 at 21:54 UTC
On The big beast: hands on with the Panasonic Lumix DMC-GX8 article (1253 comments in total)
In reply to:

AshMills: Please can you add a picture of the behemoth next to a DX DSLR to put these comments, and the headline into perspective. Anyone would think it was the size of a dining table.

Wow, thanks for the size comparison. I was curious how the GX8 related to GX7 size-wise and that site is very useful!

Direct link | Posted on Jul 17, 2015 at 16:46 UTC
On The big beast: hands on with the Panasonic Lumix DMC-GX8 article (1253 comments in total)
In reply to:

Samuel Dilworth: The big question remains: what steps were taken to address shutter shock?

The shutter appears to be different, since the GX8 flash-synch speed has been downgraded to 1/250 s from the GX7’s 1/320 s. But I see no mention of an electronic first-curtain option.

And the speed with which the fully electronic shutter traverses the frame is unknown, as are any bit-depth limitations when using it.

Also, I have seen mild effects of shutter-shock on my GX7 using the 14-140. E-shutter shots are modestly sharper in some circumstances at slower shutter speeds. So any improvement in mechanical shutter in GX8 would be welcome - don't know if they would tout that as a feature since it implies a criticism of earlier bodies.

Direct link | Posted on Jul 17, 2015 at 16:38 UTC
On The big beast: hands on with the Panasonic Lumix DMC-GX8 article (1253 comments in total)
In reply to:

Samuel Dilworth: The big question remains: what steps were taken to address shutter shock?

The shutter appears to be different, since the GX8 flash-synch speed has been downgraded to 1/250 s from the GX7’s 1/320 s. But I see no mention of an electronic first-curtain option.

And the speed with which the fully electronic shutter traverses the frame is unknown, as are any bit-depth limitations when using it.

The p/review at www.cameralabs.com/reviews/Panasonic_Lumix_GX8 hints that there is full 12-bit readout using the electronic shutter. So that is good news for RAW shooting.

Direct link | Posted on Jul 17, 2015 at 16:35 UTC
On The big beast: hands on with the Panasonic Lumix DMC-GX8 article (1253 comments in total)

Anyone know if the hotshoe is going to have any multi-function connections? Or is it simply for flash?

Direct link | Posted on Jul 17, 2015 at 16:28 UTC as 81st comment

Confused by the statement in the preview: "the FZ300 combines optical and digital image stabilization."

I saw the 5-axis optical stabilization explained in an earlier panel - where does the digital image stabilization come in?

Direct link | Posted on Jul 16, 2015 at 18:21 UTC as 29th comment | 3 replies

Would be interested to know if any other Aperture refugees find this a competent replacement, and if there's any library conversion scheme.

Direct link | Posted on Jul 9, 2015 at 20:06 UTC as 45th comment | 5 replies
On Panasonic Lumix DMC-G7 Review preview (447 comments in total)
In reply to:

Edgar_in_Indy: Are we NEVER going to get an ILC body with image stabilization AND 4k???

But will the GX8 actually deliver IBIS and 4K video SIMULTANEOUSLY?

The GX7 has IBIS and HD video - just not at the same time :(

Direct link | Posted on Jul 7, 2015 at 00:22 UTC
On Panasonic Lumix DMC-G7 Review preview (447 comments in total)
In reply to:

agentlossing: I personally love the WiFi options... if they're too complex for the reviewer to figure out, why not stick with the options that make sense? Arguing there are too many features is nitpicky.

I get decent performance transferring images from my GX7 to my Android phone, but I've NEVER been able to figure out how the whole Lumix Club scheme is supposed to work.

Direct link | Posted on Jul 6, 2015 at 17:37 UTC
On Panasonic Lumix DMC-G7 Review preview (447 comments in total)

Does anyone know the issues in the image pipeline that would cause images captured with the electronic shutter to be so much noisier than with the mechanical shutter?

Direct link | Posted on Jul 6, 2015 at 17:27 UTC as 107th comment | 6 replies

$150 bounty to the first person that can root this card.

Direct link | Posted on Jul 1, 2015 at 22:49 UTC as 9th comment | 1 reply
Total: 219, showing: 1 – 20
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