December 18, 2014, 04:57:52 AM

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Messages - weixing

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1
Canon EF Zoom Lenses / Re: Canon 100-400mm f/4.5-5.6L Mark II
« on: December 17, 2014, 08:56:37 PM »
Hi,
The lens has a locking (friction) ring that locks it at any focal length.  If it is not tightened before pointing up or down, the lens may tend to creep.  mine is new and still stiff, but after it gets worn in, I'd expect that it would need the friction.
   Can lock at any focal length... good... this is one feature that I want to confirm before consider this lens.

   Have a nice day.

2
Canon General / Re: Canon USA Addresses the Gray Market
« on: December 17, 2014, 01:22:19 PM »
Canon USA, UK, etc are their own P&L centres. Why should they cross subsidise via way of a warranty an item bought from another country. 

Simple answer: ONE company. ONE world. ONE global economy. Not only for Canon, companies, makers, sellers of products. But also for us, buyers, customers.  8)

We don't tell Canon in what countries to manufacture their products. Canon is in no position to tell us, their customers, where to buy their products - as long as they come from their factories. They should be grateful when we spend our money on their products rather than on those from competitors. It would be in Canon's own best interest to keep us, their customers as happy as they possibly can. That includes the very best aftersales service they can possible pony up and offer to us. For all their products, for all their customers, no matter where we live, work and purchase Canon products.

Fair is fair.

While that it a ideal view, its not a realistic one, not at least until all countries come up with the same regulations, same taxes, same liability laws, etc.  Companies have separate P&L centers because they have to deal with the different laws and tax rates.
 
In fact, its not one world.  Here in the USA, its not even one country, each state has its differing laws and  differing taxes.  Politics plays a huge part.  At least, some laws are common, so that makes it possible to sell the same product in most states, but some products can only be sold in certain states.
Hi,
    I still remember a few years back when astronomical products in my country was very expensive (easily double the price of the selling price in USA) and quite a few USA major astronomical manufacturer told their online retailer that they are not allow to sell outside USA when we try to place order. As a result, those USA virtual address shipping service become very popular in our local astronomy community.

   Have a nice day.

3
Canon General / Re: Canon USA Addresses the Gray Market
« on: December 17, 2014, 01:06:09 PM »
Hi,
There are fake 800Es circulating (for those for whom the real ones weren't bad enough). A warning has been issued by Nikon.

https://nikoneurope-en.custhelp.com/app/answers/detail/a_id/63056
    Not sure is it true or not, but I have heard story that some fake Canon 5D3 appear in China which come with an APS-C sesnor... althought I think it's quite unlikely, but looking at this, may be it's true...  :o

    Have a nice day.

4
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: December 17, 2014, 08:04:04 AM »
Hi,
   I bet it won't call "3D"... hmm... unless it can also shoot 3D photo...  ;D

   Have a nice day.

5
Canon General / Re: Canon USA Addresses the Gray Market
« on: December 17, 2014, 07:58:44 AM »
...
Canon had many offices and service centers in many country and all of them are local company that need $$ to operate, so why you expect the local Canon company to service your under warranty Canon product FOC
...
But that "local company" business structure was not the decission of the customer but of Canon.
So it's the opinion of thos complaining here that Canon has to deal with that and not that the customer has to suffer from this.

An original Canon product is an original everywhere in the world.
And the world no longer is "local", it's "global".
Hi,
    But Canon didn't force customer to buy their products. Every company had their own terms and condition and if you don't agree to them, don't buy their products... the choice is yours. If you want to buy gray product, go ahead, but just don't expect them to honor the warranty... the choice is still yours.

    Anyway, ideally, it's "global", but not everyone use the same currency, not everyone speak the same language, not everywhere had the same law, not everywhere had the same culture and you still need a passport when travel to other country, so it's still "local" in the real world.

   By the way, the funniest warranty I every read is from pelican case warranty: "This guarantee does not cover shark bite, bear attack, or children under 5." Children under 5 is as destructive as shark bite and bear attack... ha ha ha  ;D

   Have a nice day.

6
Canon General / Re: Canon USA Addresses the Gray Market
« on: December 17, 2014, 06:54:18 AM »
Hi,
    I'm not surprise and don't understand why people here upset about it. Canon had many offices and service centers in many country and all of them are local company that need $$ to operate, so why you expect the local Canon company to service your under warranty Canon product FOC when you live here but buy from another country?? It's simple, if you decided to buy a gray product, you also must accept the risk of not having a local warranty.

    Anyway, just be careful when buying a gray product as not all Canon product had the same specification... For example, Canon 6D(WG) had Wifi and GPS, but Canon 6D (N) do not.

    By the way, Canon product in USA are a lot cheaper than in my country, but I usually don't buy expensive products with electronics and motor in it without a local warranty.

    Have a nice day.

7
Canon General / Re: Sensor life
« on: December 15, 2014, 06:51:43 AM »
Hi,
Is there something like 'sensor hours' before it goes bad?
Why assume they will go bad?  Maybe we'll discover that sensors get better with age?  Perhaps in 100 years time artists will covet the sensors from the early 2000's for their colour shifts, dead pixels, CFA fading, sun damage, laser damage, accumulated background radiation exposure etc etc?  All of these should give each sensor a unique signature that sets it apart from the mainstream, making them very valuable.  In fact, I'm going to start stocking up now.
    Yes... better stock now. In 50 years time, the king of "Canography" will be 1D4 or may be 1DX.... ha ha ha  ;D

   Have a nice day.

8
EOS Bodies / Re: Using full frame lens on crop body cameras ?
« on: December 15, 2014, 06:42:49 AM »
Hi,
+1 to Joey.  That is probably the best explanation I've ever heard and also one of the most intelligent arguments I've seen on a forum in years.  I had actually believed that none sense about depth of field on crop bodies until now. Thanks
    Actually, it's not nonsense, it's just that most people assume that the image framing is the same (same field of view) when mentioning the depth of field on crop camera.... to get the same image framing (same field of view... eg. half body portrait on FF camera = half body portrait on crop camera), you need to be further away from the subject or use a shorter lens at the same distance... which will increase the depth of field.

   Have a nice day.

9
EOS Bodies / Re: Focus problems with the Canon 7DII?
« on: December 12, 2014, 06:44:44 AM »
Has anyone else had this happen, and if so, what did you do?

Interesting, because I would have expected the exact opposite: My single-point 6d/60d completely screw up in falling snow because with just one piece of information, the camera cannot decide if it's a subject or "gras/snow/... in front of subject" lock. I'd guess that with multi-af, the camera should be smarter, at least in theory.

The camera did nothing when you pushed the shutter.... no hunting and no shutter release... It took me a minute or two to realize what was happening... If I pointed it at the deer, nothing. If I pointed it at a nearby tree, it worked. It was as if you had a distance switch set to focus on close objects only. (there is no such switch on the 17-55) I swapped lenses out for a 70-200 and it did the exact same thing. I tried manual focus and the shutter would release, but absolutely dead in auto-focus mode when you pointed it at a more distant object....

I am going to have to re-read the AF system manual and see if the various setting have any impact.
Hi,
    My country don't snow, so can't test, but will rain very heavily... hmm... may be I'll test shooting the rain and see what happen (don't ask me to test the weather sealing of 7D2 because I'm not weather sealed... ha ha ha ) :P Anyway, there are so many possible condition out there that the camera AF will face, not surprise if there are certain condition that the testing procedure miss that will cause the AF system to be confuse.

    By the way, this guy 7D2 seem ok shooting in blizzard... http://www.foto-buzz.com/index.php?script=page&id=77&type=fotoskool

    Have a nice day.

10
EOS Bodies - For Stills / Re: 6D vs 7D mark II
« on: December 09, 2014, 03:44:34 AM »
Hi,
   IMHO, if you seldom shoot action and birds, get a 6D. No point trading IQ for fast frame rate and AF system if you don't need it most of the time.

   Have a nice day.

11
EOS Bodies / Re: Focus problems with the Canon 7DII?
« on: December 07, 2014, 01:08:39 PM »
Turning off MFA when shooting at a ruler seemed to correct focusing with very wide apertures on a non-moving subject.

So this morning, I went out to redo my servo sports test, with a different BRAND NEW Canon 7Dii, same lens 24-70 2.8 (which I know is working on my 5Diii).

More soft focusing.

Im upset about this, thats 2 Canon 7Dii Bodies in a row. Ill have access to two more later this week. Ive taken a couple thousand shots with 2 different 7Diis, about 90% or so are no good.

This is what it looks like:
Hi,
    Hmm... I'm not sure, but look like it's seem too out of focus to be an AFMA issue... just wonder how big the  error require to get this out of focus?? May be you should post the original jpeg with all the info intact (such as AF points) for us to take a look.

   By the way, what's your settings on the "AI Servo 1st image priority" and "AI Servo 2nd image priority"??

   Have a nice day.

12
Hi,
   Nice image, but no one said that low ISO DR is not importance... to some, it's importance, but to others, it might not as importance.

   Anyway, I though lights and shadows are importance in photography, but it's seem like the current trend is all lights and no shadows....

   Have a nice day.

13
EOS Bodies - For Stills / Re: 7d Mark ii not responding F00
« on: December 06, 2014, 05:05:09 AM »
Hi,
   My 7D2 had no problem so far with my EF 400mm F5.6L by itself, but will hang (sometime cannot power on) when use with the Kenko 1.4x Teleplus Pro 300 DGX. The interesting part is the Kenko 1.4x Teleplus Pro 300 DGX work with my Tamron 150-600mm on the 7D2... AF super unreliable, but at least it try to AF and don't hang...  :P

    Have a nice day.

14
EOS Bodies / Re: Petapixel: Canon Full Frame Mirrorless
« on: December 05, 2014, 07:42:24 PM »
No mistake.  There will be a complete transition. Ef-s is the dead end. ;-)

Ef-m = sole surviving aps-c mount
Ef = surviving mount for tele > 100mm
Ef-x = new, dominant mount for mirrorless ff < 100mm.

Advantage for canon: mirrorless ff buyers have to purchase body and new lenses. Bodies cheap, lenses expensive. See sony A7 series plus FE lenses.  ;-)
Hi,
    EF-S = low cost lens for crop camera.
    EF-M = lens for compact mirrorless camera.
    EF = main lens mount for all the rest.

    IMHO, Canon will maintain the EF mount as the main mount since they are still coming out new lens for EF mount. If Canon going to FF mirrorless, it'll still be an EF mount... if they want to come out with a small FF mirrorless, they can use EOS 100D (Rebel SL1 ) as a model for it.... small enough, but still can install a larger battery for the power hungry mirrorless camera.

    Have a nice day.

15
EOS Bodies / Re: Petapixel: Canon Full Frame Mirrorless
« on: December 03, 2014, 10:04:24 PM »
I'm probably in the minority by wanting a large mirrorless camera.  Canon has certainly said that the majority of buyers want smaller cameras, so there is every possibility that will prevail.
 
Canon did patent a new lens mount that may have been targeted at a mirrorless.
 
So, while I'd like a Mirrorless that used EF lenses native, its unlikely to actually happen.  Canon will come out with a new lens series, and a adaptor for EF lenses, then trickle out some of the new ones each year.
Hi,
   IMHO, if Canon going to replace some of their DSLR with mirrorless, they can just use EF mount:
1) All current lens will be compatible with it... don't need to spend $$ to create another new mount and new lens.
2) Handling and ergonomics - not everyone want a small camera due to handling. Also, with a small camera body, you can only put so much buttons and dials on it and ergonomics will suffer... a lots of people want fast operation... most don't want to go into the menu every time they want to change something and current Canon DSLR design had very good ergonomics.
3) If you want good IQ with high resolution image, large lens with large diameter lens element is needed and large lens don't go well with small camera body.
4) Mirrorless need more power than DSLR, if you decrease the camera size, battery life will suffer and also to drive the lens for faster AF, you need more power.

   Canon can just maintain 2 mirrorless lines:
1) DSLR size mirrorless - for people who don't mind or want a bigger camera body for better handling and ergonomics.
2) EOS M style small mirrorless - for those who want small camera.

   Anyway, Canon can just use one of their DSLR design... remove the mirror box and replace the prism with an EVF and they got a DSLR size mirrorless camera...  ;D

   By the way, I hope Canon can install a some sort of sensor curtain to cover the sensor when not in use (power off or during power saving mode) or during changing lens. An exposing sensor is not a good thing especially when changing lens in the field. Also, imaging a super telephoto lens on a mirrorless during transportation and accidentally point at the Sun... you'll end up a burning sensor.

   Have a nice day.

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