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Messages - weixing

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106
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 question...no.
Hi,
   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.

107
Lenses / Re: Samyang 800f8
« on: October 10, 2013, 10:06:13 PM »
Hi,
   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.

108
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.
Hi,
    Me too... With my experience with Sony after sales service, I'll also stick with Canon.

    Have a nice day.

109
Third Party Manufacturers / Re: New iPhone: Final Nail in the Coffin
« on: September 11, 2013, 11:42:18 PM »
Hi,
   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.

110
Lighting / Re: Wildlife Photography , To flash or not?
« on: September 09, 2013, 05:08:30 AM »
Hi,
    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.

111
EOS Bodies / Re: Canon Leads in Sensor Tech
« on: September 05, 2013, 02:09:34 AM »
Hi,
    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.

112
EOS Bodies / Re: 70D black-cap tests
« on: August 31, 2013, 12:44:23 AM »
Hi,
    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.

113
EOS Bodies / Re: The Canon EOS 70D is Hitting Stores
« on: August 22, 2013, 10:12:53 PM »
Hi,
    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.

114
PowerShot / Re: PowerShot Announcements Tonight [CR3]
« on: August 21, 2013, 11:50:00 PM »
Hi,
   No SX60?? Want to get a SX50, but wondering will an update version coming out soon??

   Have a nice day.

115
Canon General / Re: Where's the competition for the 24-105?
« on: August 19, 2013, 09:18:27 PM »
Hi,
   IMHO, 24-105 F4L will not be updated if it's still a kit lens. I think when the 24-70 F4L fully replace 24-105 F4L as the new kit lens, then 24-105 F4L will be updated.

   Have a nice day.

116
Hi,
    More importance is reliability and better QC, but only time will time.

    Have a nice day.

117
Hi,
   I mount with the upright on the right side, so that the compact shotgun mic on my camera hot shoe will not get in the way when doing a vertical shot.

  Have a nice day.

118
Hi,
   When comparing the Sigma 120-300mm f/2.8 DG OS HSM S with 2x converter (F5.6) with my EF 400mm F5.6L with 1.4x (F8), the Sigma doesn't look that good... only step down to F8 then the IQ is on par with the EF 400mm F5.6L with 1.4x (F8).

  Then I compare the Sigma with 2x converter with the Nikon 300mm f/2.8G AF-S VR with 2x converter, I was very surprise... did TDP get a bad copy of Nikon 300mm f2.8 or is the Nikon 300mm f2.8 that bad??

  Suddenly, the Sigma 120-300mm f/2.8 DG OS HSM S look like a very good value lens... the only issue is did Sigma solve the sample variation issue??

  Have a nice day.

119
EOS Bodies - For Stills / Re: 70D Sample photos ISO 100-25600
« on: August 02, 2013, 02:47:26 PM »
I'm confused.... I thought the big improvements in the 70D were all about focus??  A a 60D owner, I find the focusing system to be more of a limit than the image quality...
Hi,
    I'm also a 60D owner looking to upgrade and 70D still doesn't have enough for me to upgrade... the dual-pixel is interesting and might be useful to me, but still not enough for me to upgrade. If the AF is more sensitive... like -1EV instead of -0.5EV, then I might just go ahead. Now I'll wait and see what will 7DII offer... hopefully it'll be -1EV or better.

    Have a nice day.


120
EOS Bodies - For Stills / Re: 70D Sample photos ISO 100-25600
« on: August 02, 2013, 11:09:05 AM »
I'm looking at the ISO 6400 example between all three camera, and I see virtually no difference. Although, if I may say so, in some areas the 7D looks sharper than the 70D, but there are a variety of factors to consider. In some areas, the lighting or reflections are not exactly the same, so that can skew the results.

Thinking about it though, since the megapixels have increased in the 70D, the image quality has had to improve to some degree to keep up with the 60D and 7D.

Next, I looked at the ISO 100 example between the 70D and 7D, and saw virtually no difference either. Maybe in some cases some of the colors were better in the 70D, but that's really just clutching at straws.

Both the 7D and 70D appear to provide the same image quality is what I'm seeing.
Hi,
    I'm not surprise as some website already mention that the higher MP 70D dual-pixel sensor IQ is same as 60D for RAW.

    Have a nice day.

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