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Messages - weixing

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Software & Accessories / Re: Photoshop CC & Lightroom 5 for $9.99/mth
« on: November 23, 2013, 01:21:04 PM »
    The price is good, but I'll still stay away from it.

    The reason is that I mainly use Lightroom 4 to catalog my photos. If I sign up the offer and upgrade to Lightroom 5 and if they raise the price later to amount that I can't afford, then I'll have a big problem as I don't think Lightroom 4 can read Lightroom 5 catalog. So even if I reinstall Lightroom 4, I might have to redo all my tagging which is a lot of work.

  Have a nice day.


EOS Bodies / Re: Canon Teaser Appears in Korea
« on: November 10, 2013, 11:37:23 PM »
    An EF mount Mirrorless Camera??

    Have a nice day.
A mirrorless like SL1, compatible with EF lenses is not a bad idea. Just use the 70D sensor and will be a serious competitor for micro 4/3.

That's pointless because the focal plane won't move forward with EF lenses, resulting in a 'fat' body that has room for a mirror but no optical VF or fast AF. Hmmm....
    AF might not be as fast as traditional PDAF, but potential is there.

    With dual pixel sensor technology, may be Canon can come out with user definable AF points... it'll be very nice to be able to define the number of AF points, where your AF points and the size of your AF points.

   Have a nice day.

EOS Bodies / Re: Canon Teaser Appears in Korea
« on: November 10, 2013, 12:22:13 AM »
    An EF mount Mirrorless Camera??

    Have a nice day.

    WOW... IMHO, that's an ugly camera... so many controls and dials.

    Paying more for less features... hmm... or may be paying more for a lots more dials?? Ha ha ha  :P

    Have a nice day.

While this is my first post to this forum, I have been reading and learning from it for a while... so I thought it was time to try giving something back ;) .

Yesterday for the first time, when I tried to use my Canon 70D with a kenko DGX (blue dot version) 2x extender and the Canon 400 5.6L, the camera basically froze, refused to turn off or write pictures to card. The only way to resume it was to remove the battery.

The same problem (or some variations of it) kept reappearing every time I try that combo. The teleconverter works fine with other lenses, and the lens works fine with other teleconverters. At first I could not figure out what was wrong... also because I successfully used that combo before!

Then I remembered I read something similar here regarding the 5D mark III:

I thus realized that the reason for the new behavior was that I recently tried to AF microadjustment that lens (luckily, no need for that, or maybe needed just -1 in some situations).

I then switched off the AF microadjustements, and everything worked flawlessly again. By the way, the new Dual pixel AF works quite nicely with that combo, allowing AF at 800mm/F11 (sometimes it can hunt a bit, but it is fast enough to take pics of a perched bird)! Too bad you can't microadjust...

Hope this helps!

The blue dot 1.4 also refuses to work on my 60d and 70d with the 400 f5.6, but works perfectly with 1dmk2n. It also worked (and autofocused) on the 60d with a 100-400 L.
I have MFA on the 70d but the 60d does not have MFA so must be a different issue. Going to try your fix and see if i can get it working on the 70d.

Pity if it doesnt as i bought the converter specifically for this lens and body. Lucky for me its working on the 1D and images look great..
   I had this kenko TC, 60D and 400mm F5.6L and it's does AF on 60D with 400mm F5.6L, BUT the centre point is extremely unreliable... you need a very contrasty target for the centre point AF to lock on. The strange thing is the outer AF points work better. Same issue with 70D.

   By the way, it work perfectly with 6D... as long as you don't activate the MFA.

   Have a nice day.


Third Party Manufacturers / Re: Rumor: Nikon Digital FM2 - Retro look
« on: October 28, 2013, 05:10:02 AM »
    Hmm.... just wonder will they remove the rear LCD to complete the retro look...  :P

    Don't really care about the retro look... anyway, 20 years down the road, my 6D will be the retro look camera... if it's still working.

   Have a nice day.

It's not the pixel size, it's the total sensor area that gives FF the better ISO performance.  The 5DII and 20D have the same pixel pitch.

So, to answer your
   I had to disagree... the iso performance of the sensor is base on the pixel size and the sensor technology, not the sensor size... 5DII have better ISO performance than 20D is due to the sensor technology and image processing advancement.

  For example, if I crop a 5D3 image to the same size as a crop sensor or I create a crop sensor mask and install in a 5D3 camera, will the iso performance suddenly become bad??

  Have a nice day.

Lenses / Re: Samyang 800f8
« on: October 10, 2013, 10:06:13 PM »
   Samyang 800f8 is a mirror lens. The problem with most mirror lens is that the contrast is quite low compare to lens and you'll have doughnut shaped bokeh... a bit odd and most people don't like it. And of course, you don't have AF (I think Sony mirror lens is the only one that had AF)... not even in live view.

   Have a nice day.

Third Party Manufacturers / Re: Sony FF NEX - competition is good. Canon?
« on: September 26, 2013, 07:54:22 AM »
Wow. Canon activity has gone so dormant we're now discussing Sony rumors!

I think I'll stick with Canon.
    Me too... With my experience with Sony after sales service, I'll also stick with Canon.

    Have a nice day.

Third Party Manufacturers / Re: New iPhone: Final Nail in the Coffin
« on: September 11, 2013, 11:42:18 PM »
   IMHO, camera smartphone will definitely affect the sales of low-end P&S, but might actually increase the sales of high-end P&S, mirrorless camera & DLSR.

   Those who interested in photography will get a high-end P&S, mirrorless or DSLR at some point of time. Those who not interested in photography will not buy a decent camera with or without the existence camera smartphone. They might brought a low end P&S to satisfied the need of taking photo in certain occasion.

   With the introduction of camera smartphone, more people will be taking photo and those who initially not interested in photography, might get into the hobby. If they do, they'll eventually get a high-end P&S, mirrorless camera or DSLR due to better image quality... especially the interchangeable lens camera.

   By the way, the "100% view" button on the image viewer is the ultimate larger sensor camera promoter... once you press it, it's hard to resist not to get a better camera... ha ha ha  ;D

   Have a nice day.

Lighting / Re: Wildlife Photography , To flash or not?
« on: September 09, 2013, 05:08:30 AM »
    When I start shooting birds a few years ago, I learn how to use flash for birding until I saw one collared kingfisher juvenile nearly fall down from the branch when my first flash goes off... I observe that the kingfisher startle every time my flash goes off. My conclusion is:
1) my flash photography skill was lousy and
2) flash did affect and frighten some birds in some way... may be more on juvenile birds.

    After that I never use flash on birds anymore.

    Have a nice day.

EOS Bodies / Re: Canon Leads in Sensor Tech
« on: September 05, 2013, 02:09:34 AM »
    When dual Pixel AF mature, may be we'll see the first mirrorless sport/wildlife camera... taking full resolution images at high speed in silence... but I'll miss the "machine gun" sound... ha ha ha

    Have a nice day.

EOS Bodies / Re: 70D black-cap tests
« on: August 31, 2013, 12:44:23 AM »
    Different between Canon RAW and Nikon RAW: if you shoot at the highest shutter speed with lens cap on, the mean value is 2048 for 60D (if I remember correctly) and Nikon is 0.

    I think that's because Canon RAW files retain the bias level information in the RAW files, but Nikon remove it... that's why Astrophotographer prefer Canon DSLR over Nikon DSLR as they can calibrate the image properly for Canon RAW files.

    Have a nice day.

EOS Bodies / Re: The Canon EOS 70D is Hitting Stores
« on: August 22, 2013, 10:12:53 PM »
    Saw it on the store yesterday night and play with it.

    The normal AF is faster compare to 60D and the live view AF work really well and fast. High ISO performance basically same as 60D.

     By the way, I notice that the 70D user manual indicate that there are 2 version: 70D (W) and 70D (N). 70D (N) do not have WIFI... certain country cannot use WIFI??

    Have a nice day.

PowerShot / Re: PowerShot Announcements Tonight [CR3]
« on: August 21, 2013, 11:50:00 PM »
   No SX60?? Want to get a SX50, but wondering will an update version coming out soon??

   Have a nice day.

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