September 02, 2014, 04:02:02 AM

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Messages - weixing

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In another thread on this website, there is a lot of posters from this website that are (or at least were!) absolutely certain that 4K wouldn't take off this year and that Canon wouldn't need to include it in their cameras this year. Seems to me that everyone else thinks that now is the right time to be delivering 4K capability.

If the 7D mark II arrives this year without 4K, Canon will be at the station looking at the caboose as it disappears into the distance...
That really made me smile... and brings up a mental image of Mr. Canon and Mr. Nikon at the train station filming the departing train in 1080 at 30hz, while on the train, the lovely ladies Miss Sony, Miss Panasonic, Miss GoPro, Miss Red, and a host of others are waving goodbye :)

I think I'll go take my GoPro and shoot some 4K video, and when I'm done I'll grab my p/s and try to capture some blue jays in flight at 240hz....
    Then they realized they left all the consumers at the station...  ;D

    Have a nice weekend!

Lenses / Re: Tamron 150-600mm AF servo issues?
« on: March 31, 2014, 08:14:09 AM »
   By the way, the EF400mm F5.6L + kenko 1.4x Teleplus Pro 300 (560mm) reported in my 6D correctly as 560mm @ F8.0, but on the Tamron, it reported 600mm @ F6.3... without the TC.

i don´t get that sentence.
you mean concerning the max aperture for AF?

the 6D will focus with the tamron + 1.4 TC from kenko... but only if contrast is good.
otherwise it´s hunting forever.
    I mean when I use the EF400mm F5.6L with the Kenko 1.4x TC, it'll reported the actual focal length and f-stop correctly to my 6D (560mm @ F8.0), but when use the kenko 1.4x TC with the Tamron, it'll report the focal length and f-stop without the 1.4x... ie 150mm @ F5.0, 400mm @ F5.6, 500mm @ F6.3 and 600mm @ F6.3.... just wonder how the focal length and f-stop reporting work??

   Have a nice day.

Lenses / Re: Tamron 150-600mm AF servo issues?
« on: March 31, 2014, 07:11:27 AM »
   I also just got my Tamron. From my observation for 1 session with my 6D (center point AF), the AF servo once in a while (notice 2 times) will go out of focus a bit on a stationary subject... but I'm not very concern at the moment unless it happen very often.

    Anyway, the result look quite good... 500mm and 600mm @ F6.3 is slightly sharper than mine EF400mm F5.6L + kenko 1.4x Teleplus Pro 300 (560mm) @ F8.0, but EF400mm F5.6L had less vignetting than the Tamron.

   By the way, the EF400mm F5.6L + kenko 1.4x Teleplus Pro 300 (560mm) reported in my 6D correctly as 560mm @ F8.0, but on the Tamron, it reported 600mm @ F6.3... without the TC.

   Have a nice day.

EOS Bodies / Re: 6D Firmware 1.1.4 released
« on: March 20, 2014, 02:05:46 AM »
It seems totally logical that they should have a configuration option that if Logging is turned off, to have the GPS shut off with a custom delay (I would pick 1 hour) after you either shut off the camera switch, or after it auto powers down.  When it powers back up, it starts with the same GPS it had at shutdown, so often it's not far off.  I would gladly live with my first shot or two not perfect rather than a dead battery nearly EVERY time I pick up my camera.

IMO, Canon's GPS implementation is worse than half-assed.  I'm not even sure if it is quarter-assed.  Don't get me wrong, I like having it, but I'd like it a lot better if the people who implemented it had taken the time to do it right instead of saying, "Okay, we have data, ship it."

The 6D's battery has about 13,000 mWh of capacity.  If it is running down in a week, the camera is drawing almost 80 mW continuously.  Given typical GPS power draw, that suggests that the GPS hardware is acquiring fixes pretty much continuously, which is just completely and totally brain damaged, IMO.

In an ideal world, the camera should continue grabbing coordinates normally for a user-controlled period of time after you power it off (15 minutes, by default).  After that period, it should grab coordinates only about once every 45 minutes so that the ephemeris data is always up-to-date, and so that its last known location is close enough to pretty much guarantee a hot start (unless you're in an airplane).

Powering up for a five second GPS fix once every 45 minutes should require very, very little battery power.  Even with some of the worst GPS chipsets, that should take less than 1 mWh per hour.  So by doing a single fix every 45 minutes, a theoretically perfect battery should last for somewhere on the order of 1.5 years in standby mode, not counting any other current draw for writing the data to flash.

Of course, the battery's self-discharge rate would likely run the battery down in less than a year, but that effectively means that the GPS's power consumption should be lost in the noise.

Also, in an ideal world, if GPS coordinates aren't available yet when a photo is taken, the camera should try to retroactively compute the coordinates after it obtains a lock, or at least write the coordinates into the EXIF data of recently taken photos after it obtains a lock, but that's another bug for another day.
    I just disable it (I register it in the quick menu) before I switch off my 6D, so not a big problem.

   Anyway, I only use the 6D's GPS as a backup as it take a long time to obtain an initial lock. Garmin eTrex 30 is a lot faster and can display a custom map...

   Have a nice day.

EOS Bodies / Re: EOS 7D Replacement Mentioned Again [CR1]
« on: March 13, 2014, 09:37:27 AM »
Is AFMA toast?

The 70D is the tip of the iceberg..... it barely scratches the capabilities of Dual Pixel... there are interesting times ahead!

I think this is a correct assessment.  With dual pixel technology, you really don't need AFMA any more.  There is a great article about this in the April edition of "Digital Photo Pro" magazine.
    Or may be an Auto AFMA which you can perform easily in the field... something:
1) You put an AF target at a certain distance and turn on Auto AFMA.
2) AF lock using the traditional PDAF and press the shutter.
3) When the shutter is pressed, the dual-pixel AF kick in to check the AF.
4) The difference will be updated in the camera (or lens) for that lens.

    Have a nice day.


EOS Bodies / Re: EOS 7D Replacement Mentioned Again [CR1]
« on: March 13, 2014, 09:25:49 AM »
For me, it's all about pixel density. I have 20/10 vision..I can CLEARLY see the pixels. It's utterly horrid..

I'm at 20/15 w-o correction, and I can see the pixels in my EVF too if I want to concentrate on that.  But it doesn't bother me since I don't expect it to look exactly like an OVF. There's enough information density to be useful for what it is, a composition tool with a rich amount of camera data added.  I don't need to color-proof with it, don't care if it has other limitations you've described, as long as it's fast, responsive, works well in low light and provides the information I need to perform the function it's supposed to.
It does that just fine, and it's even better than an OVF when it comes to low light.  I don't mind a little noise in my low light EVF image when it allows me to see more detail than I could looking thru an OVF.
So, if today's EVFs don't appeal to you, tomorrow's might.
One of the other benefits is I get from an EVF is a much better idea of how a stopped down image will look because I'm seeing it without the effect of a focus screen in an OVF that interferes with how the image actually looks for in-focus to OOF transition areas.

Either way, good EVFs won't prevent you from using them for what they are there for, to compose the shot.  Even the very low rez EVF in my old Panasonic FZ-20 was useful and still truckloads better than trying to compose using the rear display in sunlight.
I have an EVF on my SX-50. It is low res and you can see the pixels.... there is considerable lag. Then look at the EVF on the Olympus u4/3 cameras... It is a world better! /not as good as optical, but getting close. We are very close to hitting the resolution where it is beyond what the eye can see... anyone want to bet that the prototypes in the labs are past that level yet?

This is like the film/digital debate. When digital first came out, the quality was garbage. Over time, the positions reversed themselves. Digital now is far superior to film of the 1990's, but that comparison is meaningless because in that period the quality of lenses has taken a huge jump forward and so have AF systems... in other words, film images shot today WITH THE EXACT SAME FILM are better than film images shot in the 1990's.

The point being, componentry does not exist in a vaccumn... it is affected by all the other facets of the camera.
EVF's are getting better, but many of the improvements are the result of system changes. For example, what kind of dynamic range can you show on an EVF? Improvements in sensor dynamic range have a big impact here...If you have an EVF that can show 10 stops of dynamic range, it will look a lot better maping a 14 stop sensor onto it than it would maping a 6 stop sensor...

Lag time has gone from annoying to you have to look hard to notice it.... how far away is unnoticeable?

EVF's are coming. Is the time now? None of us know. We will not know until it gets released. In the meantime we speculate and discuss.
    The main issue with EVF is that it require battery power to operate which is a big disadvantage especially for wildlife and nature photographer... they usually spend very long time looking through the viewfinder and wait for the moment to get the shot they want. With OVF, the camera can be in standby mode while waiting for the moment, but you can't do that with EVF... just imagine how many battery they need to bring and change during the wait.

   Have a nice day.

Canon General / Re: Off Brand: Nikon Announces the D4S
« on: February 26, 2014, 12:02:29 PM »
I was right, ISO 409600 is going to revolutionize shooting!  Look at the fine details and complete lack of artifacts on this shot!  Coal mines, Mammoth caves, and Marianas Trench here I come!

Full comparison here:

It's a funny one, BTW, because the guy with the D4 has every shot in focus, and the guy shooting the D4S...not so much...
   Look like a mosaic... may be Nikon should call this the "mosaic mode".  ;D

   Have a nice day.

EOS Bodies - For Stills / Re: 6d issue
« on: February 16, 2014, 01:04:51 PM »
    Some questions:
1) Did you zoom in when changing the settings?
2) what mode are you in and what's the settings (shutter speed, aperture and iso)?
3) Did you took the photo in the live view or you off the live view when you took the photo?
4) Did you use cable release?
5)Did you enable mirror lock-up?

    Have a nice day.

Lenses / Re: Canon PowerShot G1 X II Thoughts from CP+
« on: February 15, 2014, 06:09:39 AM »
Note the G1 X II lens is 24-120mm 35mm film (FF) equivalent[/b] .  With the 1.92 crop factor, the lenses aperture is FF equivalent to f/3.8-7.5, not exactly fast!  You can use a f/1.2 or 1.4 primes on the EOS-M and for FF equivalent apertures of f/2 to f/2.2, something the G1XII can't get close to.
    The f-ratio of the lens didn't change... the field of view is equivalent to 24-120mm 35mm FF.

    Have a nice day.

PowerShot / Re: Updated PowerShot G1 X II Specs
« on: February 10, 2014, 12:55:59 PM »
    NFC = Near field communication??

    Hmm... If I remember correctly, Canon had a patent sometime ago on communicating the lens with the camera body wirelessly. Hmm... may be Canon are testing out the technology on this model?? May be the camera body will communicate with the lens and EVF wirelessly using NFC?? But NFC communication is quite slow right?? Just wonder??

    Have a nice day.

PowerShot / Re: Canon PowerShot G1 X Successor Coming Shortly [CR2]
« on: February 03, 2014, 07:20:29 AM »
    May be it'll come with a Dual Pixel Sensor, EVF and a fast zoom lens with a red "rubber band"....  :P

    Have a nice day.

    Yap... go for the 6D.

1) The IQ from 6D is a lot better than 70D (which IQ is similar to 60D) especially at ISO 800 and above.
2) The 6D only got 11 AF points and looking on your requirement, you might not need that many AF points, but the 6D center point is very good at low light AF which I think you'll find it very helpful in your night shot.
3) The 6D got GPS built-in (I use it when I forgot to bring my external Garmin GPS unit).

    The only feature I think you'll miss from 70D is the flip screen which is very helpful when you shoot at low angle... although you get the similar function using the 6D wifi remote apps with your phone.

    Good luck and have a nice day.

Third Party Manufacturers / Re: Review: Sony A7R With Canon Glass
« on: January 29, 2014, 08:41:14 AM »
I've seen a lot of Canon users using this camera for their landscape acts until Canon releases its own comparable camera.  The Sony center guy located in my place (Kuala Lumpur) told me that a lot of users inquire about the A7r and immediately ask where to buy an adapter (then buy them).  It's just fortunate that both Sony and the third-party seller of the adapter is located in the same floor and at the same mall.  Most of my colleagues here are either macro and/or landscape shooters.  I myself, am waiting for cheap second hand ones from the market to use for my landscape photos.

Downunder, the adaptor is included in the camera price (as well as the battery grip). Sony have done their marketing.

So now all that they need to do is come up with a firmware update that fixes the shutter blur problem and they're home!
    So the heavy shutter I feel when trying out the camera is the real... Why they need a shutter?? Isn't vibration free a selling point for Mirrorless camera??

    Have a nice day.

The IS test from hell.... 4 second exposure, handheld, 600mm, with a shivering photographer... and cropped image...

I am surprised it went as well as it did.
    WOW... handheld Astrophotography on Orion Nebula...  ;D

     The IS must be quite good or you must be very steady... 4s at 600mm...  :o

    Have a nice day.

don't care for video, don't need or want "global shutter" in a DSLR.

You still get rolling shutter artifacts (skew) when taking pictures of fast moving objects.

Yes. It matters for still... a lot less, because the effect is less obvious in stills, but it does.

Personally, I don't believe the rumor. Canon hasn't "innovated" in the DSLR video space for a while. They've only ever made their video less crappy faster than other manufacturers over time. And I say this as a video guy who currently shoots with a 5D3, and also shot with a 7D and 5D2 when they were the bee's knees in video.

A brief timeline of video on Canon DSLRs:

The 5D2 gave us full frame video for the first time, but no manual audio, no manual exposure, no 24p and 30p wasn't even 29.97 like it should be. It suffered severely from moire, rolling shutter, and bad codec.

The 7D gave us 24p and manual exposure out of the box.  It still suffered severely from Moire, rolling shutter, and bad codec.

The 5D2 Eventually got manual exposure, 24p and manual audio, but still suffered from severe moire, rolling shutter, and bad codec. Of course, nothing below the 7D was any better. Eventually, one of the rebels got an articulating screen, which is kind of nice.

Mind you, all these "problems" weren't problems on non-DSLR video cameras, so we're just bringing the cameras back toward "normal" not "good".

Then came the 5D3, which finally got rid of moire, at the cost of overall sharpness (again, I speak from personal experience) and slightly less bad (but still bad) rolling shutter and a slightly less bad (but still bad) recording codec. Worst, 5D3 has hugely ugly fixed pattern noises that were NOT present in either the 5D2 or 7D... progress. Oh, I guess I should give Canon some kudos for enabling clean HDMI out, but they weren't even close to first there, so to say they "innovated" that feature is stretching it a lot.

Around the same time, the 1DC was also announced. Its "innovation" being a 1DX with slightly beefier processors that can shoot cropped 8 megapixel (that's what 4K translates to) JPEGS at 24 frames a second. You could've predicted what the 1DC was going to be from the specs in the "development announcement" just by crunching the pixels processed per second number in the 1DX. I did, and the 1DC was an absolutely no-surprise camera for me.

That's it. That's all the "Innovation" they gave us so far, concerning DSLR video.

Not that the other manufacturers are doing much better, but to believe that all of a sudden, Canon is going to break new ground with not one but TWO features, one of which has only ever been seen in ONE digital cinema camera from a competitor? I don't think so.  (By the way, that would be global shutter on CMOS sensor in Sony's F55, and I believe the "cost" of the technology was a half stop less sensitivity)

Would I dearly love Canon to do global shutter and 2.5k in a 1DX-2, 1DC-2, or even a 7D-2? Hell yes. If it comes with a good codec (and I mean 8-bit 4:2:2 in-camera minimum, 10-bit preferred) I would pay 10k for it in a heart beat. The amount of problems global shutter, better codec, and a sensible amount of resolution increase would MORE than justify the cost.
    Then why use DSLR for video?? Just use a non DSLR video camera.

    Have a nice day.

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