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Panasonic GH1 DSLR 1080p24 HD 12MP 17.3x13mm sensor


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#21 Peter J DeCrescenzo

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Posted 02 May 2009 - 08:18 PM

Thanks, Satsuki. It's been fun researching the GH1.

Some new Hawaiian sunset footage from Philip Bloom, shot using his UK version GH1 with the stock zoom lens, recorded in 720p50 mode, graded and slowed down to 25p in post:
http://philipbloom.c...h1-slow-motion/

Refer to the link for his comments about the footage.
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#22 Peter J DeCrescenzo

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Posted 02 May 2009 - 09:02 PM

Skew artifacts:

The GH1 'MOS sensor (& the cam's internal processing) appears to exhibit less skew ("jello") artifacts compared to many other 'MOS-based cams. GH1 recordings may exhibit skew during swish camera moves, or when vertical objects move quickly in frame. But the artifact is not as bad as exists in some more expensive cams.

Hunter Richards has posted footage demonstrating how the GH1's 'MOS skew ("jello") artifacts are affected by the record format (1080p24 vs. 720p60). He also discusses this test on DVXUser.com:

http://www.dvxuser.c...ad.php?t=170043

Flash-band artifacts:

Early reports indicate the GH1's 'MOS sensor & processor are susceptible to recording "flash-band" artifacts (bright horizontal bands resulting from electronic flash, strobe light, etc.), as is the case with most other 'MOS-based cams. At this point there's no way to know if Panasonic could or would issue a firmware fix for this, or if the GH1's internal circuitry can support this type of work-around such as the HPX-300 apparently can.

'MOS vs. CCD image sensors:

CCD-based cams generally don't have skew. Some CCD-based cams in the GH1's price range record smear artifacts (vertical streaks emerging from pinpoint light sources.) 'MOS-based cams, including the GH1, generally exhibit little or no smear.

YMMV!
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#23 Gabriel Bordas

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Posted 03 May 2009 - 03:46 PM

I missing something? The spec.:

*Full-HD (1920 x 1080) movies are output by the image sensor at 24p (NTSC)/25p (PAL), and recorded at 60i (NTSC)/50i (PAL). HD (1280 x 720) movies are output and recorded by the image sensor at 60p (NTSC)/50p (PAL).

Source http://www.panasonic....lease/gh1.html

So the GH1 capture 1080 progresive image and record on a interlaced stream. The big isues is if the interlaced stream it realy a PSF type of coding to a more compact progresive pakage of data. I hope that the camera it not making some sort of ¨p¨ to ¨i¨ conversion. I´m afraid that the real MTF it´s not make more than 720 linies. Can somebody confirm that? My HDX900 camera with the 720 CCD seams sharper.

Regarding the band with. Gh1 always record 50/60fps at 17Mb in HQ. The 24/25fps it´s a puldown like in HVX200? If so, it´s more logicaly to record at 720p that to record at 1080 with less bandwith per frame?

Why the only whay to record native fps it´s in MJPEG at 720p 30fps ?
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#24 Peter J DeCrescenzo

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Posted 03 May 2009 - 04:07 PM

Hi Gabriel: I don't have access to a GH1 myself (currently, very few people do), but I believe some of your questions might be addressed in this recent post by a GH1 owner in the USA:
http://www.dvxuser.c...p;postcount=848
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#25 Peter J DeCrescenzo

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Posted 05 May 2009 - 12:54 PM

Here's another YouTube video, this one allegedly shot using a GH1 fitted with a tilt-lens. Fun!


This video almost looks like an animation or an xcu video of a very accurate miniature architectural model of an entire city, until the final scenes where the quantity of vehicles and their motion all but rule it out -- unless this video is a very skillful & elaborate hoax. :-)

FYI: When searching for GH1 videos on YouTube, Vimeo, etc., try using search phrases such as "gh1 panasonic" or "gh1 lumix". Searches on "gh1" typically yield hundreds of videos concerning Guitar Hero instead of the GH1 camera. ;-)
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#26 Peter J DeCrescenzo

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Posted 05 May 2009 - 07:18 PM

Some new night footage shot using a GH1 fitted with a f1.4 lens:

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#27 Ram Shani

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Posted 07 May 2009 - 05:48 AM

the more videos i see from this cam the more i want it!
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#28 Peter J DeCrescenzo

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Posted 10 May 2009 - 11:50 AM

Two PL lens mounts and a anamorphic lens used with the GH1:
http://www.dvxuser.c...ad.php?t=170756
http://prolost.com/b...your-mount.html

Number of seconds 'til a JJ Abrams-style Star Trek no-budget tribute short complete with ghetto flashlight anamorphic lens flares appears? 10 ... 9 ... 8 ... 7 ... :-)

Concerning other lenses & mounts, see:
http://www.cinematog...h...st&p=281726

Philip Bloom has some hot fun in Joshua Tree with his GH1 fitted with a PL mount and various lenses:
http://philipbloom.c...-and-pl-lenses/
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#29 Peter J DeCrescenzo

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Posted 12 May 2009 - 09:20 AM

Nice video shot using a GH1 with a LensBaby attached (although I don't know which model LB was used):

View on Vimeo

For info about LensBaby, see:
http://www.lensbaby.com/
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#30 Peter J DeCrescenzo

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Posted 12 May 2009 - 10:32 AM

UPDATE 6/10/2010: Vitaliy Kiselev's (AKA "Tester13") "PTool" firmware modification utility software for Panasonic Lumix Micro Four-Thirds cameras (AKA "the GH1 firmware hack") essentially transforms the DMC-GH1 into a whole new camera, image-wise. The improvement is _HUGE_. Plus, the hack adds useful new capabilities in addition to "merely" increasing the recording data-rate. Refer to post #53 for more info:
http://www.cinematog...ndpost&p=325618

=============
=============

I posted the following on DVXUser.com, but I thought I'd post it here, too.:

I think the GH1 is almost perfect for high-end digital still camera consumers and for some pro photo & video applications, too. But I think the GH1 could "easily" be so much better. So, here's my list of features which I think should/could be added to the GH1 (possibly via a firmware update) or be featured in some future "GH1B" or "GH2" model. These are my opinions only, presented in order of their importance to me.:

- Full-time live video output: Full-time live _composite_ video output (including during recording) would be acceptable, but only if the cam's internal video recording quality is also increased (see below). Full-time live HDMI video & audio output is preferable. If full-time live HDMI-out is implemented I'd "settle" for leaving the cam's built-in recording quality as-is because using an external device for high-quality HDMI recording would be an option. The GH1 isn't a DSLR, it's really a video camcorder, and virtually every video camcorder ever made has had some form of full-time video out. There are many, many good reasons for this. Full-time live video-out is not a crutch. It's a _normal_ part of many (but not all) video productions. Among other things, many clients expect & are more than willing to _pay_ for full-time live video monitoring on-set, and many crew positions depend on it, too. Is it absolutely necessary in every production situation? No. But in many/most, yes.

- Allow audio auto-gain (AGC) to be disabled: It would be preferable if a GH1/B/2 user could adjust audio recording levels on the fly, but I'd "settle" for allowing switching the mic jack to line level input for use with an optional external mixer.

- Full-time live _audio_ out via the included USB-to-RCA cable: Preferably full-time live line-level audio output should be implemented along with the other items listed here, but it's really independent. The line-level audio out could be used with an optional audio mixer, headphone amp or other equipment to enable monitoring audio during recording.

- Full-time headphone audio output: This is a no-brainer. Even most consumer users have earbud headphones! All pro users use them when recording "important" audio, right? Unfortunately, adding a headphone jack to the GH1 means modifying the cam's case design, but this should be relatively easy for Panasonic to do. However, I could live without a headphone jack _if_ full-time live line-level audio out was available via the GH1/GH1B/GH2's USB-to-RCA cable.

- Flash-band CMOS artifact workaround: Panasonic offers this workaround as a firmware update for the HPX300. If something like this could be implemented in the GH1/B/2 I'd be willing to pay for it.

- 1080p24 recording quality improvement: I don't care how Panasonic improves the GH1/B/2's 1080p24 video recording quality -- they don't have to improve it all that much anyway -- as long as it's compatible with most popular NLE software & devices such as BluRay players. AVCHD, MJPEG, whatever, just give us somewhat better-looking 1080p24 and I'll withdraw my request for full-time live HDMI video out, but _not_ for full-time live composite video out for monitoring.

Most of the changes I've listed here would require little or no change to the GH1's form factor, case, or button layout. Most could possibly be implemented via software/firmware changes or minor hardware changes. In other words, these changes might not cost Panasonic much to implement and may offer them a nice return on their investment.

IMHO these changes would greatly increase the value of the GH1 (or GH1B or GH2) for many professional video and digital cinema professionals.

Importantly, implementing these changes won't interfere with the GH1/B/2's primary mission in life: Selling as many cameras to as many "high end" digital still camera consumers as possible. Many of the feature changes I've listed above will increase the cam's value to these consumers, too; e.g.: no one is going to complain if the camera works better for little or no increase in cost.

===

Because of the issues listed above I'm hesitant to buy a GH1 as it exists today for my personal & professional use. But my thinking on this may change ... I gotta think about it some more ... :-)
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#31 Peter J DeCrescenzo

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Posted 25 May 2009 - 02:02 PM

The user manual for the GH1 is now available for download from Panasonic in 9 languages, including English:

Enter "DMCGH1K" for the model number:
http://dlc.panasonic...ice.com/EUDocs/
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#32 Peter J DeCrescenzo

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Posted 28 May 2009 - 11:38 PM

Just an FYI: Panasonic Japan is scheduled to begin selling a GH1 "body only" configuration in Japan on June 12th:
http://translate.goo...history_state0=

For June 12th the schedule lists both "DMC-GH1A" (w. kit lens) and "DMC-GH1" (body only).
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#33 Robert Sharp

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Posted 26 June 2009 - 01:23 AM

Peter, I just got a DMC-GH1 directly from Japan. No switching to English menus! Is there anyway to change the firmware to the English language version?

Robert


[quote name='Peter J DeCrescenzo' date='Apr 28 2009, 09:54 AM' post='284691']
At least one GH1 is now in the Los Angeles area of CA. It was purchased retail in Japan and hand delivered to the US. Its US owner, named Kholi, who now frequently posts about it on DVXUser.com:
http://www.dvxuser.c...ad.php?t=169564

Japan-sourced GH1 cams have on-screen menus and documentation in the Japanese language only. They don't allow switching the GUI to English. Kholi can't read Japanese, but despite the challenge he seems to be making progress investigating the cam.
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#34 Peter J DeCrescenzo

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Posted 29 June 2009 - 01:01 AM

UPDATE 6/10/2010: Vitaliy Kiselev's (AKA "Tester13") "PTool" firmware modification utility software for Panasonic Lumix Micro Four-Thirds cameras (AKA "the GH1 firmware hack") essentially transforms the DMC-GH1 into a whole new camera, image-wise. The improvement is _HUGE_. Plus, the hack adds useful new capabilities in addition to "merely" increasing the recording data-rate. Refer to post #53 for more info:
http://www.cinematog...ndpost&p=325618

==========
==========

Peter, I just got a DMC-GH1 directly from Japan. No switching to English menus! Is there anyway to change the firmware to the English language version? ...


To the best of my knowledge, Panasonic sells GH1 cams in Japan featuring Japanese-only on-screen menus.

Installing the current firmware update does _not_ change this, but does address certain other issues. See:
http://panasonic.jp/.../dsc/index.html
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#35 Peter J DeCrescenzo

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Posted 21 August 2009 - 01:10 PM

Just an FYI post to include some recent GH1-related links. Note: When available, view the "HD" versions of the online videos.

- DP Byron Shah, Jason Ensler and the folks at Birns & Sawyer shot a test demonstrating the GH1, Red One and 5DM2 cameras. The GH1 & Red One were shooting thru cine lenses, with the GH1 using Illya Friedman's Hot Rod Cameras PL mount:


Byron has posted information about this shoot on Illya's company website:
http://www.hotrodcam...-dp-byron-shah/

- Kevin Cartwright recently posted a brief test using a Cooke Speed Panchro 18mm Ser. III lens mounted on a GH1 using a Arriflex Standard to Micro4/3 adapter from Hawkpeng:


- Manny Crisostomo used a GH1 to shoot a nicely done piece for a newspaper website:


- Jeffrey Nee shot a short film with a GH1 while waiting for his new baby to be born:
http://gallery.me.co...p;bgcolor=black

- Julian Davies shot portraits of folks on the streets of Oslo:
http://vimeo.com/groups/gh1/videos/5929436

Many other GH1 examples can be found on Vimeo & YouTube.

Audio input & microphone tests:

- Ozpeter has posted results of some informal tests of the GH1's internal and external microphone performance (including MP3 audio files). Despite the GH1's automatic audio recording level feature, it can record relatively clear-sounding stereo audio. This will be useful for scratch or reference recording, and as Manny's piece demonstrates, adequate for some program audio, too.

This first test compares the GH1's built-in mic to a few different external mics:
http://www.dvxuser.c...mp;postcount=12

In his second test he discovered the GH1 apparently supports "plug-in power" (similar to phantom power) -- an undocumented feature -- which he demonstrates with a pair of external lav mics:
http://www.dvxuser.c...ad.php?t=177740

Meanwhile, I haven't bought a GH1 myself -- yet -- Posted Image but I'm enjoying "keeping an eye on" it and related developments.

I hope the above info is helpful.
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#36 Mitch Gross

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Posted 21 August 2009 - 03:41 PM

The Hot Rod PL mount adapter for the GH-1 is available exclusively from Abel Cine Tech. Now available for rent as well.

http://www.abelcine....oductid=1001600
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#37 Tim Carroll

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Posted 30 August 2009 - 07:16 PM

The Hot Rod PL mount adapter for the GH-1 is available exclusively from Abel Cine Tech. Now available for rent as well.

http://www.abelcine....oductid=1001600


Mitch,

A little confused here. Does this PL mount adapter allow you to use PL mount lenses on the GH-1 in their normal focal length? Or is there some kind of multiplier? Is there any issue with the back side of the PL mount lens contacting the mirror in the GH-1 or is the GH-1 not like an SLR with a mirror for the viewfinder? And finally, does the GH-1 have a full size 35mm sensor, like a Nikon D3?

Thanks for any and all info.

Best,
-Tim
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#38 Mitch Gross

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Posted 03 September 2009 - 01:10 PM

Mitch,

A little confused here. Does this PL mount adapter allow you to use PL mount lenses on the GH-1 in their normal focal length? Or is there some kind of multiplier? Is there any issue with the back side of the PL mount lens contacting the mirror in the GH-1 or is the GH-1 not like an SLR with a mirror for the viewfinder? And finally, does the GH-1 have a full size 35mm sensor, like a Nikon D3?

Thanks for any and all info.

Best,
-Tim

Tim, as it says in the title to this thread, the sensor on the GH1 is 17.3x13mm, which is a bit smaller than the RED One sensor. The Hot Rod adaptor is purely mechanical, with no optics within. So the field of view on a given lens will be a little tighter on the GH1 than on a Super-35 film camera.

There are no issues with physical clearances of any kind for the lenses and the camera. The GH1 does not have a mirror as it uses an electronic viewfinder. One of the great design features of the Micro 4/3rd format is that it is so shallow a flange depth that there are adapters for just about any other lens mount available.
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#39 Thomas Dobbie

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Posted 03 September 2009 - 07:22 PM

Hi,

I just wanted to add that I got one of Ilya's adapters from Abel,and it's a truly professional piece of kit,and a no brainer if you already own PL mount lenses. It turns a little consumer level camera into something really quite enjoyable to use,and so long as you work within the limitations of the codec,it can yield some quite surprising results. Although the sensor is slightly smaller than S35,the FoV and DoF characteristics are very close. I was shooting a commercial last week on the RED, and just out of interest set up the GH1 as a B cam.
I was very surprised at the results,as was the DIT and the editor.
Check out the links in Peter's post,I might not want to shoot a feature on it,but you could shoot a TVC without any problem.

Tom.
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#40 Thomas Dobbie

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Posted 03 September 2009 - 07:43 PM

Just an iPhone shot of the rig,18-50 RED zoom (I'm quite pleased to have found a use for it).Arri matte box and follow focus.
I Know it doesn't look like it,but it balances very well.
The cost of the GH1 and PL Adapter is about the same as a 5D MkII body.

Tom.
IMG_0088.JPG
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