December 20, 2014, 12:32:59 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - weixing

Pages: 1 2 [3] 4 5 ... 25
31
Hi,
   No one having this problem??

   Anyway, after some more testing... seem like the issue will happen only at longer focal length... 350mm and longer. At focal length shorter than 350mm, it doesn't seem to happen.

   By the way, one way to make sure the lens will search focus till the minimum focusing distance is to put the lens cap on.

   Have a nice day.

32
EOS Bodies - For Stills / Re: Sending my 7D2 back due to high ISO noise
« on: November 23, 2014, 10:49:39 PM »
Hi,
   I accidentally took some shots at ISO 12800 and after a basic NR in LR 4, it's look ok to me for web use:


  Have a nice day.

33
Reviews / Re: Bryan Carnathan has completed his review of the 7D Mark II
« on: November 23, 2014, 08:03:51 PM »
Well I hope Brian's knowledge of the camera is better than his knowledge of horses !

You might try reading the review before embarrassing yourself with a gratuitous negative comment.

"Perhaps even more beneficial for understanding what can be done with this frame rate is to look at a visual example. Drag your mouse over the labels under the following image for a visual look at the 10 fps rate. Drag your mouse completely across all of the labels in 1.3 seconds to get an idea of the speed of the approaching horse – approximately 40-45 mph (64-72 kph). I know, the labels are a bit small for that mouse move, but this approach happened very fast."

She would have to be riding a top form Derby winner - on the flat - on good going - with a race saddle - riding weight less than 7 stone. As I said, this target would have been travelling towards the camera at 18 mph max.
Hi,
   Know nothing about horse, but are you sure horse run so slow?? Slower than most top athlete?? Hmm... I thought basically any healthy horse can out run the fastest human...

   Have  a nice day.

34
Hi,
    I discover today an issue when using Tamron 150-600mm live view focusing with 7DII... not sure is it my copy issue only or a common issue, so may be those who had the Tarmon 150-600mm and 7DII can try this out and see whether is it a common issue.

    Usually, when the lens cannot find focus and hit the minimum focusing distance, it'll try to find focus by focusing towards the infinity, but with Tamron 150-600mm and 7DII, it'll hang at the minimum focusing distance (it'll happen regardless of the setting in "Lens drive when impossible" is on or off). Please note this only happen in live view.

    Below is the procedure that will cause this issue to show:
1) Under live view setting, set Continuous AF to Disable.
2) Now using live view, focus something closer than the minimum focusing distance.
3) Once the Tamron 150-600mm focus till the minimum focusing distance, it'll hang and won't respond on any new AF command in live view.
4) To get back to normal operation, you can: (a) switch out of live view and use normal viewfinder to achieve AF, then the live view AF will be back to normal or (b) Using the manual focus to focus till very close to focus, then your live view focus will be back to normal.

   I try the below combination, but only happen when using Tamron 150-600mm with 7DII:
1) Tamron 150-600mm with 60D: Normal operation, after it focus to minimum focusing distance, it'll try to find focus by focusing towards the infinity.
2) EF400mm F5.6L with 7DII: Same as above.

    So the issue must be with the Tamron 150-600mm. Also, the Tamron 150-600mm live view focusing is very, very slow... My EF400mm F5.6L is way faster in live view AF.
 
    Have a nice day.

35
About APS-C vs FF bokeh/DOF - a recently published portfolio of mine in Lenswork Magazine contains a number of images that I made with a small NEX5 and a Nikkor pre-Ai manual focus lens.  The OOF rendition is so creamy smooth and luscious that people thought I might have used an old large format film camera and lens.  I feel concerns about OOF rendition in APS-C vs FF may be overblown.

About heavy and large having perceived value - I immediately thought of Cadillac (or whoever it was) putting lead in their doors to give them a customer satisfying "clunk" when they closed.  Between friends we call this the "impressing strangers" effect (yes, we're all nerdy engineering types).  Bigger and heavier means "better", right?   ;)

About talking jumping ship - You can put me down in the column of people who already have jumped ship.  The only thing I have left to sell is my 7D/100-400L birding kit.  The 5D MkII/24-105L studio kit (and a bunch of other L glass) are already sold.  And with the in-camera IS Sony just announced, I can see a 70-400 Sony kit on will soon be on it's way. 

I'm only one small insignificant drop in a sea of millions of cameras sold each year, so I'm not tilting any balance any particular direction by doing what I'm doing.  I just wish Canon gave me a compelling reason to stick around.  The transition costs are significant.

Sensor tech will keep evolving, but a larger sensor means less dof with the same f-stop - that'll keep "full frame" running even if "full" is just a strange reminder of the film days...

... A lot of people don't mind about heavy and large, it implies value and craftsmanship...

... If Sony keeps innovating at the same speed, about that time the difference to old-school dslr gear will be so large people might really jump ship rather than talk about it.
      Every woman is beautiful and every man is handsome when seen alone, but when you start comparing side by side, some woman are more beautiful and some man are more handsome unless you are very good in makeup.... ha ha ha  :P

     Anyway, I consider camera an expensive equipment and I usually only change once in many years unless there are some feature on the new model that I need, so for me, good technical support and after sales service is top priority. IMHO, Sony had many very good and interesting products, but their technical support is very bad (at least in my country)... the service center told me that they do not have power adapter and LCD screen replacement for a notebook that just run out of warranty, so cannot repair and this had happen not once, but quite a few times. For me, I won't buy any Sony product that cost more than double digits.

    Have a nice day.

36
Hi,
for those who haven't experienced IBIS in a Pentax or Olympus body, it can work very well.  Makes nearly every lens you have stabilized, even classic old primes.

Oh my, the IS does sound appealing and is bound to rival Canon's hybrid IS on their newer 100L, 24-70L. But looking at the picture on the japanese site, the 5-axis version seems to need a generic, tc-like attachment?



Canon and their shareholders have to count on the old-school dslr crowd not jumping ship, looking at the speed Sony innovates Canon can nearly stop trying in the enthusiast-midrange market.
    The TC-like attachment is the adapter for A-mount lens to the A7 II. I think what the picture show is that:
1) The pitch and yaw IS correction is perform in the E-Mount OSS lens when use with A7 II.
2) The 5-axis IS correction is all done in the A7 II when using E-mount non-OSS lens and A-mount lens via adapter.

    Hmm... Is there any new innovation?? Only just a refresh of A7 with better specifications...
Anyway, at this rate of releasing upgrade (releasing upgrade model faster than Canon Rebel entry DSLR??), I don't think it's good for Sony and especially their technical support department... may be they don't intend to have one: Your camera not working... we just release a new one, go and get it.  :P

    Have a nice day.

37
Software & Accessories / Re: Adobe Lightroom 5.7 Now Available
« on: November 19, 2014, 08:34:23 AM »
Hi,
    Adobe DNG Converter 8.7 is also available now with 7D2 support...  ;D

    http://www.adobe.com/support/downloads/detail.jsp?ftpID=5855

    Have a nice day.

38
EOS Bodies - For Stills / Re: 7DII lightmeter on top LCD.
« on: November 18, 2014, 05:21:52 AM »
Hi,
   Look like those DSLR which got an exposure level indicator scale in the right side of the viewfinder will not have this feature on top of the LCD.

   By looking at the number of people thought you mean exposure compensation meaning not many people know it... may be that's why Canon removed it since there is already one in the viewfinder.

  Have a nice day.

39
EOS Bodies / Re: A Real EOS M Replacement Coming Soon? [CR1]
« on: November 17, 2014, 11:58:45 AM »
Hi,
   No rebel yet, so may be the rebel will be replace by an M... a Rebel M...  ;D

   Have a nice day.

41
Hi,
    Good... need the EF-S 24mm on my crop DSLR, so I can bring out more often.

   
I'm not sure of the performance of the 24 105 STM yet, but for only $50 more or less you can get a 24 105 F 4 L.  granted it might be grey market, but it is still an L lens.

And if the MTF graphs are anything to go by then it is an L lens that has lesser IQ.
    May be this EF 24-105mm f/3.5-5.6 IS STM will be the new kit lens for the next new full frame DSLR while Canon prepare the upgrade for the EF 24-105mm F4L...

   Have a nice day.

42
Hi,
    I initially thought the yellow box mean "Yellow Card", but realised that it shouldn't be the case as the admin got so many "Red Card"... ha ha ha  :P

    Have a nice day.

43
Lenses / Re: Field review of the new Canon 100-400
« on: November 11, 2014, 07:48:40 PM »
Hi,
    He mention it focus as fast as the big white prime and looking at the MTF chart, I think this will replace both the old EF 100-400mm L and the EF 400mm F5.6L.

   Have a nice day.

44
EOS Bodies / Re: Custom Dials - what do YOU do with it?
« on: November 11, 2014, 11:34:56 AM »
Hi,
   You mean the C1, C2 and C3?? This is how I setup:
Normal: Av, AI Servo AF, Shutter button for metering only, Back button AF & etc.
C1 (Bird In Flight): Tv, AI Servo AF, Min Shutter Speed: 1/1000s, Max Aperture: F8, EC: +2 stop, Shutter button for metering only, Back button AF & etc.
C2 (Video): M, Shutter Speed: 1/50s (PAL) & etc.
C3 (For other people using my DSLR): Av, One Shot AF, Shutter button for metering and AF & etc.

   Have a nice day.

45
EOS Bodies - For Stills / Re: 7D Mark II Reported Issues
« on: November 09, 2014, 08:14:23 PM »
Hi,
    Did you on the GPS?? When the GPS is on, sometime there will be lag on the AF.

   Have a nice day.

Pages: 1 2 [3] 4 5 ... 25