December 20, 2014, 07:07:28 PM

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Messages - ajfotofilmagem

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1
To edit video H264 without losing too much image quality, it would be ideal to decompress the video before editing. This can be done using additional hardware such as external card "Matrox MXO2 Mini," which will make the tripling in size files (or quintuple) but will save a lot of preocessamento Core I7.

Making crop in the native resolution of 1080p video will throw away a lot of resolution. Using the zoom lens will avoid losing resolution. In full frame cameras, the depth of field with F8 may be small to fit all players who appear in the frame.

Videos with fast moving require shutter to 1/100 or more to a acceptable motion blur.

Believe me. ::)
The wonderful 5D Mark iii is inadequate for this type of video. :-X

For this type of video, you will have better results using a real video camera. :-X Even the modest Panasonic AG-AC8, or AG-AC90 would make a sharper image with fast moving sports. These cameras will provide sufficient depth of field to have all team players in focus, and allow you to record 1080 60P to a real slow motion in moments of replay.

2
EOS Bodies / Re: Ron Martinsen Blasts the 7DII in his review
« on: Today at 09:45:15 AM »
i really like the 7dii for the af, buffer, and speed but it does make me a bit irritated to think about how canon could put the 6d sensor in the 7dii body, sell it for  $1800...
Yeah, and I bet you're irritated that Chevy didn't put a Big Block V8 into the Camero instead of that piddly little 3.6L V6 and sell it for the price of a Cruze, too.  Because that would be just so feasible...   ::)
the sensor in the 6d is not expensive and it would not be difficult to put it in a 7dii body.
Just forgot a detail ... Put a larger sensor in a body 7D Mark II, maintaining 10 frames per second performance would require:

A larger mirror box also capable of high speed.
A larger shutter, still capable of high speed.
A larger pentaprism.
A better heat dissipation.
A larger battery consumption.
A larger AF sensor with focus points covering a larger area.

I think that exists and is called 5D Mark iii.

EDIT: Neuro replied before me.

3
Yes, it's the color temp of the lights changing (flicker).  Enter the anti-flicker feature of the 7DII...
Or use slower shutter speeds such as 1/125.

4
The Canon EF lenses launched in the last decade are designed to provide clear images even in 80 megapixel sensors (at least in the sweet spot of the lens). While Canon Cine lenses are designed to provide high quality images at up to 32 megapixel sensors.
High quality images in Cine lenses, means:

*Do not have breath focus, noticeable.

*Making extremely precise manual focus through a ring that rotates 180 degrees about.

*Do not have vignettes, chromatic aberration, barrel distortion, noticeable to the point they need to be corrected in post (as is done in stills photo).

I believe the Canon cine lenses can produce better images than old EF models, but should not reach the sharpness of the Sigma 50mm Art.

5
Lenses / Re: Buying Advice: What First Lens for a Full Frame?
« on: December 18, 2014, 02:29:34 PM »
Is the quality in optics noticeably better in the 50 1.4 compared to the 1.8?
If the two lenses are used in F1.8 aperture, both 50mm F1.4 and also 50mm F1.8, the F1.4 model will have sharper image, and has the fastest and silent focus.

If the two lenses are used in F2.8 then the F1.4 model has a litlle advantage in image quality.

If the two lenses are used in F5.6 the image will have the same quality in both lenses.

6
Third Party Manufacturers / Re: ENELOOP ????
« on: December 18, 2014, 02:16:09 PM »
Dear friend Surapon.

I agree with the comments above, but I have a detail to add:

Avoid very fast chargers.
Chargers that complete charge in less than 2 hours, causing overheating and deteriorating the batteries.

Chargers completing the load between 2 and 4 hours are ideal for maintaining the health of your batteries.

7
The possibility of having a universal format with the new 14 bit per color is interesting. But the success of a JPEG substitute depends on its adoption by Lightroom, Photoshop, Windows and Mac OS.

However, for users to change their workflow, saving the processed images in a new format, it would be good that Canon and Nikon had this format option, in addition to JPEG and RAW traditional.

8
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: December 17, 2014, 08:50:37 AM »
If it is a Canon sensor then my bet is that the IQ will be about the same as 7D2/70D and that the graphs and measurements from DxO will be about the same for all three.
The same DXO score the 7D Mark ii? :o

Impossible. :-X The reason the sensors EXMOR 36 megapixel get very high scores on DXO is the down convert to 8 megapixel, which dramatically increases the theoretical DR. ::)

A Canon sensor with the same technology 7D Mark II, but "stretched" up to 50 megapixel, would get much better score when DXO down convert to 8 megapixel, and the theoretical DR would overcome any camera that Canon has released to date.

9
Lenses / Re: Buying Advice: What First Lens for a Full Frame?
« on: December 17, 2014, 08:34:32 AM »
landscape, portrait, concert/music
landscape
No clue... I'd probably lead towards a Rokinon 14mm, but I'm not a wide angle guy.

portrait
85mm f/1.8 usm... very solid portrait focal length, sharp wide open, only around $350 or so used... andit can use used for concert... but it might be a touch short depending on how far you are.

concert/music
alternatively, the 100mm f/2 is a solid option.  People don't talk much about it... but it does a solid job... and you get a touch more length.
Indeed, the uses to which the OP describes can only be properly served (on a budget) with prime lenses.

I strongly recommend Canon 100mm F2 for musical concerts and portraits. A lens forgotten by many, and almost as good as 135mm L.

Landscapes be well made with Samyang 14mm, but 40mm pancake could one supplement the set in the landscape where the exaggerated perspective is not desirable.

10
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: December 17, 2014, 08:21:09 AM »
NOT a camera for my use. But I rejoice for those who need more megapixel. I'm glad more for shut up those who made mockery of Canon sensors in recent years, but will not buy anyway.

11
Third Party Manufacturers / Re: FYI: D750 light leak issues
« on: December 14, 2014, 07:53:55 PM »
What exactly is a light leak?
Light leakage is a problem in that light passing through slits or holes (not through the lens) and wrongly reaches the image sensor, or metering.

12
Third Party Manufacturers / Re: FYI: D750 light leak issues
« on: December 14, 2014, 07:33:10 PM »
Canon quickly admitted that there was light leakage in 5D mark iii, and a few weeks later offered immediate and no-cost repair. ::)

Judging by Nikon history, they must deny the problem until in 2015 there will be a D760 without this problem. :-X

13
Canon General / Re: Sensor life
« on: December 14, 2014, 10:23:38 AM »
In normal use, should last for several years. But exposed to sunlight during live view generates overheating, which can denificar the sensor. The film also deteriorated with high temperatures, but you bought a new one after another 36 photos. ::)

Beware of lasers pointing directly at the camera lens, video mode. A powerful laser can burn a pixel row in a fraction of second.

14
I liked cat photo. But I made a poster of 1.2 meters of my cat and I saved a lot of money.
poor cat, don't you miss it now :-)
LOL :-)

Oh God! I DO NOT done this with my cat. :o
The word "poster" has another meaning in the English language? ???
The meaning I know of is "a large size print." ;)

15
I remember, about a hundred years ago, when my brother got married.  The Bride wanted to go directly from the church to a cemetary across town.  The bride, in her gown, was going to pray at the grave of her mother.  OK, a little weird, but if that's what is important to her, great.
The really oggly part was that she had a videographer and she had to do the whole getting out of the limo -- walking to the grave-- kneeling to pray-- and then returning to the limo about 4 times.
It just struck me as moving from a simple sincere praying at a grave into a big production with retakes.
There are two sides. 

1.  Retakes probably resulted in a much better final edited product. 
2.  Retakes seemed a bit.. well staged (duh) and getting far away from the original intent (praying to the dead mother about the wedding)

Is it common for "retakes" when it comes to wedding video? 
"I am ready for my close up, Mr. DeMille."
I do both photos and wedding videos (in different events), and never liked staged attitudes grooms.

For photos, okay pretend that the bouquet will play three times, and then actually do. But video, I advise the couple not to make staged actions, which always seem poor taste.

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