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A.Y.

Member Since 04 Jul 2009
Offline Last Active May 23 2015 04:47 PM
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#357840 Manta Rays - Socorro

Posted by A.Y. on 14 February 2015 - 04:44 PM

Excellent piece for a great cause!




#357785 Choose your weapon: SLR versus video camera for filmmaking

Posted by A.Y. on 12 February 2015 - 11:49 PM

https://www.youtube....v=Amwtxw6GE1w#t

 

After a quick search: Andy Casagrande on using GoPros for National Geographic assignments above and underwater. The importance of these little cameras are increasing.




#357782 Choose your weapon: SLR versus video camera for filmmaking

Posted by A.Y. on 12 February 2015 - 10:47 PM

Photos show Johnathen Bird has a GoPro and Andy Casagrande has two GoPros mounted on their Gates housings. Any idea why since they already have professional cameras?




#356670 High frame rate revolution - GoPro 2.7K 60p & 720 240p firmware coming

Posted by A.Y. on 16 January 2015 - 10:49 AM

The just announced (February release) GoPro firmware will add 2.7K 60p and 720 240p frame rates to the Hero 4 Black, delivering the most impressive and affordable high-frame-rate camera to the consumer market:

•3840x2160 30p 8MP capture & playback (too choppy for fast-moving subjects - running kids, sea lions, and sports in general even with lots of slow shutter induced motion blur, softening the frames)
•2704x1520 60p 4MP capture & playback (as smooth as human eyesight and sharper than 4K 30p for fast-moving subjects and panning since motion blur is not needed so the frames can remain sharp)
•1920x1080 120p 2MP capture & 60p playback (ultra smooth and sharp 1/2 speed slow motion)
•1280x720 240p capture & 60p playback (ultra smooth and sharp 1/4 speed slow motion)

GoPro sales has been increasing because the founder is a visionary who fully understands the importance of high frame rates to the fast-paced sports his users are engaging in.

GoPro users are definitely fueling the high-frame-rate revolution, and YouTube has responded to growing demands by adding 60p and 48p streaming.

The legendary filmmakers George Lucas (Disneyland Star Wars/Star Tours 60fps), Peter Jackson (Hobbits 48fps, Universal Studio King Kong 60fps), and James Cameron (Avatar 2 60fps) are all pushing the entertainment industry toward high-frame-rate contents while educating the public on the benefit of high-frame-rate capture and playback.

4K 30/24p vs. 2K 60/48p - James Cameron: "A 2K image at 48 frames per second looks as sharp as a 4K image at 24 frames per second ... with one fundamental difference: the 4K/24 image will judder miserably during a panning shot, and the 2K/48 won't." Why? 4K 30/25/24p require 1/60sec or slower shutter speeds to introduce motion blur to smooth out the panning shots and fast moving subjects which soften the image. 2K 48/50/60p will appear smooth without motion blur so the 2K frames can remain as sharp as possible even for panning shot and fast moving subjects.

Keep in mind that most filmmakers are forced to use the 80+ year old 24fps because many theaters around the world are still using 24fps film projectors. The good news is that these outdated equipments are fast being replaced by digital projectors capable of 120+fps so we'll definitely see the end of 24fps movies in the not so distance future. Furthermore, all movie studios will eventually follow Paramount lead and stop making film prints first in the US and then the rest of the world and that will accelerate the conversion to digital projectors.

After seeing Doug Trumbull's groundbreaking ShowScan presentation on the benefit of high frame rate, many in the entertainment industry have become converts. Personally, I have never shot any HD videos for family or work below 60fps - ever.




#353068 GoPro, ActionCam X7 or ?

Posted by A.Y. on 29 September 2014 - 11:56 AM

GoPro 4 was just announced and it has:

4K 30/25/24

2.7K 50/48/30/25/24

1080 120/90/60/50/48/30/25/24




#351768 Sony Alpha 7S for video - ???

Posted by A.Y. on 19 August 2014 - 08:05 AM

A7S Clarification:
Movie settings, including Set Custom White Balance, should be done in P, A, S, or M mode.
Turn the Mode Dial to Movie to choose whether to use P, A, S, or M settings for video.
With the Mode Dial left at the Movie position, Set CWB is grayed out, however, 3 CWB done in P, A, S, or M will still be selectable.

From my observation, the Sony A7S with its amazing low-light capabilities, FF IQ and DOF is becoming the preferred mirrorless 4K camera amongst professional filmmakers and the saving on lighting (purchasing, renting, transporting) can easily offset the cost of the external recorder. For now GH4 with internal 4K recording will be the preferred 4K camera amongst divers until Sony delivers internal 4K recording for A7S Mark 2 (??).

Since switching system is expensive, looking long term, the Sony mirrorless system has the most potential and more future proof, IMO.




#351655 Sony Alpha 7S for video - ???

Posted by A.Y. on 16 August 2014 - 09:54 PM

I heard on one review that manual white balance was not possible while doing video with the A7S - if that's true I think it would be a deal breaker..

 

My hand-on experience: In the Movie mode, A7S can perform all of the White Balance functions except Set CWB. The easy workaround is to set up to three CWB settings in P, S, A, or M and all three CWB settings will be accessible in the Movie mode. Hopefully, this little inconvenience will be corrected in the next firmware update. BTW, A7S also has an Auto Underwater WB function, but I don't know how well it works.




#348995 Sony Alpha A6000

Posted by A.Y. on 12 June 2014 - 10:38 AM

Did a side-by-side comparison between the Zeiss 12mm and the Sony 10-18mm above water. Not surprisingly the Zeiss 12mm F2.8 being a prime has sharper corners than the 10-18mm @ 12mm F4. For pixel peepers who don't mind noisy AF, the Zeiss 12mm is a great choice. Since the Sony 10-18mm has silent autofocus, smoother video AF performance, noticeably wider FOV, and Optical SteadyShot, it's a more useful lens overall and definitely a better video lens IMO.

 

The Zeiss 32mm F1.8 is also very good optically just like the 12mm, and its AF is also noisy just like the 12mm - perfect for photography or shooting video without AF. For video overall, the Sony E 35mm F1.8 OSS is a better choise IMO.




#347520 Olympus OM-D E-M1 or wait for Sony A6000

Posted by A.Y. on 10 May 2014 - 06:55 AM

 

Reality vs myth! :pardon:

 

I'm happy with the 5R and will definitely upgrade to A6000 for its AF speed. No Contrast Detection AF can even come close to tracking moving subjects like the A6000 at the moment.




#343691 Hero3 Black. How do I take advantage of this high definition camera?

Posted by A.Y. on 22 February 2014 - 02:49 PM

I experienced problems with the GoPro 2 as the automatic WB continuesly try to correct WB what makes it very dificult to correct that in postproduction.


3+ Black Auto WB does the same thing too!

To lock the WB with 3+ Black: Turn "Protune" on in the "Capture Settings" and four WB modes become available: 3000K, 5500K, 6500K, and Cam Raw.
 
To process the Cam Raw file in GoPro Studio.app you can either choose the ProTune profile (GoPro color profile) and then adjust the White Balance (Temperature and Tint), or adjust everything manually.

 

Are you using AWB for above GoPro video or CamRaw?


Should've used Cam Raw as AWB shifted the colors too much.

Thanks for the info!

I'll have to do more tests underwater to find the best settings.


#314332 White Balance with Lights? Wide Angle

Posted by A.Y. on 09 August 2012 - 10:53 AM

I think the combination of cyan filter for the light and CWB seems like a very logical solution to balance the light-lit foreground and the sun-lit background colors.

Posted Image

Stills and videos taken with AWB always turn out unnaturally blue so I prefer taking my time to set and fine tune Custom White Balance to ensure the colors come out as close to what I see as possible. Beside, I won't be able to remember the precise colors hours, days, weeks, or months later. Posted Image By the way, I cannot adjust the colors in the above AWB image anywhere close to the CWB, using either Photoshop or Final Cut Pro X. Isn't setting CWB in camera = adjusting colors in RAW before most of the color information is thrown away during the JPEG and video-compression process!

Large sensors' better high-iso performance can make a huge difference, diving early morning and late afternoon when CWB is pushed to the limits. Just saying... Posted Image