January 27, 2015, 03:52:45 AM

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Messages - weixing

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1
EOS Bodies / Re: 50mp Cameras Coming in March [CR1]
« on: January 25, 2015, 07:08:16 AM »
I gave up waiting and bought a 645z

Don't hate me.

Hope you will relate you experience with the 645z in future posts.
You know we are all secretly jealous....right?

I'm doing a write up on it now. It's really good and the best image quality I've seen on any camera, anywhere.

Plus the skin tones are great. Sony finally sorted their stuff out in that regard.
Hi,
   Err... I thought 645z is a Pentax camera?? Although they use Sony sensor, but the final colour output had nothing to do with the sensor... it's the camera firmware that determine the image colour, not the sensor.

  Have a nice day.

3
Lenses / Re: Canon EF 400mm f/4 DO IS II USM Lens Review
« on: January 19, 2015, 06:32:48 AM »
I really don't understand the whole concept of 400/4 DO II and why anyone would actualy buy it. It's probably my fault.
But let's go back for a second in time when the first generation of 400/4 DO was introduced.

400/4 DO IS - 1940g
300/2.8L IS - 2550g
400/2.8L IS - 5370g

The whole point of the 400/4 DO and the DO technology itself was beeing LIGHT! Much lighter than other lenses. Canon has sacrificed image quality to make a LIGHT lens. It was a welcomed innovation by many. You could choose to have an L lens with superb image quality or a very light (also smaller), "mobile" DO lens. Whichever you needed.
600g difference between 400/4 and 300/2.8 (which is a 420/4 with 1.4X) was significant.

And now...

400/4 DO IS II - 2100g
300/2.8L IS II - 2350g
400/2.8L IS II - 3850g

300/2.8 has improved. A LOT. It's lighter, (all II gen lenses got lighter) it's even better optically than before and also has a shorter minimum focusing distance (2m from previous 2.5m). THAT is improvement.
Meanwhile 400/4 DO got heavier. The previous 600g difference is now only 250g. Minimum focusing distance is 3.3m. Yes, it got better, much better optically. But we already had superb lenses. What we don't have is light lenses. The primary goal of DO should be to reduce weight and size. Image quality only comes second, no matter how strange that could sound to you. The first generation wasn't sold for it's image quality either.
Or maybe is it cheap? It's not.

In my opinion, the 400 DO beeing 2100g is a big FAIL. It does not stand up to the 300/2.8 (+1.4X) at all.
Hi,
    Why big fail?? EF 400mm F4 DO IS II is still smaller, lighter and sharper than EF 300mm F2.8L IS II... basically, the EF 400mm F4 DO IS II is for those who need the smallest, lightest and sharpest 400mm lens out there.

   Have a nice day.

4
Lenses / Re: Why not uppdate just the IS
« on: January 16, 2015, 07:05:14 AM »
Hi,
   Hmm... when the new EF100-400mm II perform so well and with the convenience of zoom. Will there still be a market or need for a new EF 300mm F4L IS or a new EF 400mm F5.6L IS??

   Have a nice day.



5
Lenses / Re: New Rebel & EF 11-24 f/4L USM Coming Shortly
« on: January 16, 2015, 06:49:31 AM »
Hi,
    Lens at the extreme end (either it's extreme wide, long or fast) are always going to be very expensive... So is the lens at US$3K expensive?? Yes. But is it worth it? Yes, if you need it especially there is basically not many alternative available.

   Anyway, if many photographer will paid US$11K for the EF 600mm F4L, I don't see why photographer won't paid US$3K for the widest FF lens out there to get that unique shot.

   Have a nice day.

6
EOS Bodies / Re: Review: Canon EOS 7D Mark II
« on: January 15, 2015, 01:24:15 AM »
but... but... Gary Fong said...
Hi,
    He can't even do a proper 7D2 10fps test... I think he don't even bother to learn how to properly use a 7D2 before doing all those comparison.

   Have a nice day.

7
Lenses / Re: canon 7D2 with 100-400 ii lens with 1.4 Extender for birds
« on: January 14, 2015, 03:23:14 AM »
Hi,
    Just wonder at 300mm with the 1.4x teleconverter (420mm F7.1), can 7D2 select other AF points other than the center point for focusing??

   Have a nice day.

8
Landscape / Re: Deep Sky Astrophotography
« on: January 11, 2015, 11:06:42 AM »
Hi,
   Nice... I had no opportunity to took any image of it as it's raining season (rain or overcast) now, but luckily the sky clear up a bit yesterday night and had at least a visual look at the comet...

   Have a nice day.
   

9
Photography Technique / Re: Depth of Field - Bokeh
« on: January 08, 2015, 12:08:53 PM »
That was a very good explanation of DOF
Hi,
    After watching this video, a lot of people will remember why the larger the f-stop, the deeper the field... ha ha ha  :P

    Have a nice day.

10
FWIW, the Nikonistas seem well aware that mothership Nikon has adopted DO.

Quote
MB:
PF ... silly how Nikon spells DO ...
Diffractive optical and fluorite elements, electromagnetic diaphragm ... it seams that Nikon is finally catching up with Canon in lens techology after so many years ...
But seriously this new lens looks very handy, and due to DO (PF) it is exceptionally small and light (though low weight is probably due to use of plastic also).
Nikon PF also seams different than Canon DO, they provide similar benefits but Nikon is using one meniscus lens glued to diffractive element while Canon uses two diffractive elements.
I just hope that bokeh will be better than Canon 400mm DO that I dont like very much... in that case this lens would be really great ...
By the way separate tripod collar now makes perfect sense, it is compatible with 70-200mm f/4 so you can use it interchangeably and those two lenses would make really fantastic and light travel combo ...
http://nikonrumors.com/2015/01/06/nikons-phase-fresnel-pf-lens-explained.aspx/#comment-1775042316
Hi,
    From the sample image, the flare look quite bad... Anyway, I notice that the design is different... Canon use dual or triple layered DO elements and base on the Nikon diagram, it's seem like only a single layered DO elements.

   May be Nikon had to avoid Canon patent??

   Have a nice day.

11
Lenses / Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« on: January 06, 2015, 08:21:22 PM »
Hi,
    What tripod and head are you using?? I don't have the new 100-400mm II, but I had try the 400mm F5.6L + 2x on 60D using live view AF and can focus quite well... yes, the subject need to be stationary for at least 1 min.

    Have a nice day.

12
Hi,
    Hmm... it's quite small and might be useful for storage of photo when going for long trip... it'll be better if it's can be power by battery,

   Have a nice day.

13
Hi,
    Hmm... In such close encounter situation, standing your ground might be the best choice... anyway, you won't be able to outrun an elephant, but you must be really brave to stand your ground when an elephant charge at you...

    Have a nice day.

14
"He seemed to make a big deal about face tracking and a $7k camera not having that, but if you use a face tracking feature for your autofocus you probably are not skilled enough to be using a $7k camera in the first place."

Of course all the skills you have thus far acquired are instantly forgotten the moment you use face tracking or eye focusing of this devilish new technology.  You should not ever even try them.  You might have to change your opinions and Serious Photographers do not do that...this is turning into a religious kind of an argument so I leave it here.
Hi,
   Hmm... I thought face tracking is very common is compact camera, so just wonder why it become so "exciting and wonderful" when it implement in a Sony camera?? By the way, that's a very long video, so I just browse through, but I did saw the face tracking start to track the picture on someone shirts instead on the subject face.  :o So I think I rather manually point my "old tech" AF points on my subject face... at least I'm quite sure it'll focus on my subject face instead on the picture on someone shirts.

   Have a nice day, happy shooting and Happy New Year to ALL!!.

15
Lenses / Re: Review: Canon EF 100-400mm f/4.5-5.6L IS II
« on: January 01, 2015, 10:02:01 PM »
What profile are you shooting in?  Standard or Neutral?  I ask because 90 sharpening is pretty dang high.  Pictures are very nice but look to me over sharpened and may be adding noise especially at 3200 ISO. 

I tend to either shoot in Neutral (zero in camera sharpening) and add some in post, usually no more than 50. or the default Standard which has sharpening in it already.  You just have to tell Lightroom what profile you're using. Canon Standard or Canon Neutral
Hi,
    Hmm... I always thought the in camera sharpening does not affect RAW in LR as LR applied it's own profile by default.

   Have a nice day and Happy New Year!

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