August 23, 2014, 04:21:31 PM

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Messages - weixing

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61
Hi,
    Yap... go for the 6D.

1) The IQ from 6D is a lot better than 70D (which IQ is similar to 60D) especially at ISO 800 and above.
2) The 6D only got 11 AF points and looking on your requirement, you might not need that many AF points, but the 6D center point is very good at low light AF which I think you'll find it very helpful in your night shot.
3) The 6D got GPS built-in (I use it when I forgot to bring my external Garmin GPS unit).

    The only feature I think you'll miss from 70D is the flip screen which is very helpful when you shoot at low angle... although you get the similar function using the 6D wifi remote apps with your phone.

    Good luck and have a nice day.

62
Third Party Manufacturers / Re: Review: Sony A7R With Canon Glass
« on: January 29, 2014, 08:41:14 AM »
Hi,
I've seen a lot of Canon users using this camera for their landscape acts until Canon releases its own comparable camera.  The Sony center guy located in my place (Kuala Lumpur) told me that a lot of users inquire about the A7r and immediately ask where to buy an adapter (then buy them).  It's just fortunate that both Sony and the third-party seller of the adapter is located in the same floor and at the same mall.  Most of my colleagues here are either macro and/or landscape shooters.  I myself, am waiting for cheap second hand ones from the market to use for my landscape photos.

Downunder, the adaptor is included in the camera price (as well as the battery grip). Sony have done their marketing.

http://www.digitalcamerawarehouse.com.au/prod10464.htm

So now all that they need to do is come up with a firmware update that fixes the shutter blur problem and they're home!
    So the heavy shutter I feel when trying out the camera is the real... Why they need a shutter?? Isn't vibration free a selling point for Mirrorless camera??

    Have a nice day.

63
Hi,
The IS test from hell.... 4 second exposure, handheld, 600mm, with a shivering photographer... and cropped image...

I am surprised it went as well as it did.
    WOW... handheld Astrophotography on Orion Nebula...  ;D

     The IS must be quite good or you must be very steady... 4s at 600mm...  :o

    Have a nice day.

64
Hi,
don't care for video, don't need or want "global shutter" in a DSLR.

You still get rolling shutter artifacts (skew) when taking pictures of fast moving objects.

Yes. It matters for still... a lot less, because the effect is less obvious in stills, but it does.

Personally, I don't believe the rumor. Canon hasn't "innovated" in the DSLR video space for a while. They've only ever made their video less crappy faster than other manufacturers over time. And I say this as a video guy who currently shoots with a 5D3, and also shot with a 7D and 5D2 when they were the bee's knees in video.

A brief timeline of video on Canon DSLRs:

The 5D2 gave us full frame video for the first time, but no manual audio, no manual exposure, no 24p and 30p wasn't even 29.97 like it should be. It suffered severely from moire, rolling shutter, and bad codec.

The 7D gave us 24p and manual exposure out of the box.  It still suffered severely from Moire, rolling shutter, and bad codec.

The 5D2 Eventually got manual exposure, 24p and manual audio, but still suffered from severe moire, rolling shutter, and bad codec. Of course, nothing below the 7D was any better. Eventually, one of the rebels got an articulating screen, which is kind of nice.

Mind you, all these "problems" weren't problems on non-DSLR video cameras, so we're just bringing the cameras back toward "normal" not "good".

Then came the 5D3, which finally got rid of moire, at the cost of overall sharpness (again, I speak from personal experience) and slightly less bad (but still bad) rolling shutter and a slightly less bad (but still bad) recording codec. Worst, 5D3 has hugely ugly fixed pattern noises that were NOT present in either the 5D2 or 7D... progress. Oh, I guess I should give Canon some kudos for enabling clean HDMI out, but they weren't even close to first there, so to say they "innovated" that feature is stretching it a lot.

Around the same time, the 1DC was also announced. Its "innovation" being a 1DX with slightly beefier processors that can shoot cropped 8 megapixel (that's what 4K translates to) JPEGS at 24 frames a second. You could've predicted what the 1DC was going to be from the specs in the "development announcement" just by crunching the pixels processed per second number in the 1DX. I did, and the 1DC was an absolutely no-surprise camera for me.

That's it. That's all the "Innovation" they gave us so far, concerning DSLR video.

Not that the other manufacturers are doing much better, but to believe that all of a sudden, Canon is going to break new ground with not one but TWO features, one of which has only ever been seen in ONE digital cinema camera from a competitor? I don't think so.  (By the way, that would be global shutter on CMOS sensor in Sony's F55, and I believe the "cost" of the technology was a half stop less sensitivity)

Would I dearly love Canon to do global shutter and 2.5k in a 1DX-2, 1DC-2, or even a 7D-2? Hell yes. If it comes with a good codec (and I mean 8-bit 4:2:2 in-camera minimum, 10-bit preferred) I would pay 10k for it in a heart beat. The amount of problems global shutter, better codec, and a sensible amount of resolution increase would MORE than justify the cost.
    Then why use DSLR for video?? Just use a non DSLR video camera.

    Have a nice day.

65
Hi,
    Wow!! Excellent shot!!



Fabulous! I suppose you used flash for these as well?

No flash, just 135L + 5D3 and shoot a lot
Started with 85L but that was just hilarious :).

Fun stuff I noticed when looking at the result was that with 6fps the birds still would be able to leave the frame entirely between 2 burst shots.
    May be you are just too close... ha ha ha  ;D :P

    Have a nice day.


   

66
Third Party Manufacturers / Re: Best Nikon DF Review! By Fstoppers.
« on: January 26, 2014, 08:34:58 PM »
Hi,
    If Canon coming out a retro DSLR, hope they don't just only go for the look.

    Anyway, I thought the Powershot G15/G16 already have the retro camera looks and are very usable ergonomics... may be Canon should just use the PowerShot G15/G16 design and make a interchangeable lens version... may be on the next EOS M.

    Have a nice day.

67
EOS Bodies / Re: EOS Camera with MF Peaking??
« on: January 25, 2014, 01:09:43 PM »
I assume they were referring to the Cinema EOS cameras - the EOS C100, EOS C300, and EOS C500 offer focus peaking, zebra bars, etc.

Also allow me to preempt Marsu42 and state that Magic Lantern adds focus peaking to EOS still cameras for which the ML firmware is available.   ;)
Hi,
    Oh... I thought there is some settings that I miss out...

    Thanks and have a nice day.

68
There are two diff. markets, Pro and everyday shooter. The Pro will cont. with DSLR and wonderful L lenses.

Not true. Many professional photographers are using mirrorless systems.

IMHO, don't need to worry for Canon... they already had the technology to come out a good mirrorless camera anytime...

IMHO, I don't think so. Both Canon and Nikon have been in the SLR game so long that they have millions tied into research and development that has not yet paid for itself. The insistence by Canon to slap IS into basically any new lens is proof of this assumption. This also means that they have been spending a lot of dinero on perfecting this technology, instead of simply binning it in favour of new ideas.

I do not believe Canon and Nikon are "past their prime" ...

As far as the "enthusiast" segment goes, yes, both Canon and Nikon are past it. I agree with you that both companies are severely missing out on a very lucrative market.

... so I think CaNikon are just biding their time.

Personally, I have my eye on either the Olympus E-M10 or the Fujifilm X-T1 for my non-super-telephoto stuff ... as neither Canon nor Nikon has anything to compete with these cameras. Once I've bought into either (non-Canon) system, I also won't be contributing to Canon's profit for a time.
Hi,
    There is no need to research in mirrorless camera for Canon or Nikon. When you shoot in live view, you are actually using a "mirrorless" camera already... just without EVF. With dual pixel AF, Canon had all the technology to make a reasonable fast mirrorless camera anytime...

    Actually, I would prefer them to make a hybrid system... put an EVF behind the prism, so you had a setting that enable the EVF to turn on when the mirror is up and you can lock the mirror in up position if you prefer to use the EVF, but I guess if this going to happen, it'll happen to the 1D series... not a camera I can afford... ha ha ha.

   Have a nice day.

69
EOS Bodies / EOS Camera with MF Peaking??
« on: January 23, 2014, 11:56:45 AM »
Hi,
   Do anyone of you know is there any EOS camera that had MF (Manual Focusing) peaking??

    I was reading the DIGIC 6 image processor page and in the MF peaking section, it's mentioned that "with MF Peaking, a concept inherited from EOS cameras", so I just wonder which EOS camera had it?? My 60D and 6D don't have it.

   Have a nice day.

70
Hi,
    IMHO, don't need to worry for Canon... they already had the technology to come out a good mirrorless camera anytime... the big question is when?? If you ask me, my guess is this year or next year you'll see a higher end mirrorless camera from Canon.

    Anyway, mirrorless camera is not for everyone especially for wildlife photographer when many of them like to use their super telephoto lens as a scope...  ;D Battery will use up very fast on a mirrorless camera if use this way.

   Have a nice day.

71
Does anyone think Canon is reading this stuff because I am baffled as to why they would cut shot the DR and cheat on RAW's with fast lenses.
Hi,
    IMHO, commercial product don't push their product to the limit... they usually hold back to ensure reliability... it's just like computer when you can overclock the processor on your custom made PC to the limit, but most major brand PC manufacturer won't overclock the same processor on their PC to that limit.

    Have a nice day.

72
Hi,
    Thanks for the review... Look like I'm going to order one to replace my EF400mm F5.6L once it's available in my country.  ;D

    Have a nice day.


73
Helpful, but the two things I really wanted to know weren't answered:  How effective the VC is while panning, and how much it improves at 600mm when you stop down to f/7.1 and f/8.

http://translate.google.com/translate?hl=en&sl=auto&tl=en&u=http%3A%2F%2Fqicai.fengniao.com%2F425%2F4259287_all.html

Whatever that is, it triggered AVG for a web-based exploit.


What does the chart represent? sharpness?

If I understand it correctly, it's your typical Imatest result like on Photozone. The ordinate is LW/PH.

I can't tell if it's center and edges, or center and corners, or center and average. But they go on pretty close, so it doesn't really matter. It's just good :)

I think they used a 5D MK III. As an approximation based on other available imatest data, 600mm f/8 is very, very close to the 100-400 L at 400mm f/5.6. Only very slightly worse, if you consider the error margin.
I see ... thanks
Hi,
   The dark blue is horizontal resolution and the light blue is vertical resolution base on the test chart (red box scale area).

   Have a nice day.

74
EOS Bodies / Re: Will Canon Answer the D4s? [CR2]
« on: January 18, 2014, 10:21:47 PM »
Jrista, without quoting that long post...do you honestly think it's possible for a DSLR to have its sensor cooled to -80 C?  How would that be done in a DSLR?

Active cooling is actually done quite frequently today with high end astrophotography cameras. They use dual stage peltier (TE/TEC, or ThermoElectric) cooling. Peltiers are very thin electronic heat pumps, being simply an array of N and P type silicon sandwiched between two ceramic plates (one "cold" plate and one "hot" plate, heat is pumped from the cold side to the hot side). It would be easy to fit a peltier into existing DSLR bodies without anyone being the wiser (with the exception of increased heat output, as the peltier generates it's own heat along with drawing out heat from whatever is attached to it's cold side.) Now, with most astrophoto cameras, the delta-T they aim for is around 50°C. On an average night, the temperatures drop to somewhere around -10° to -20°, however the really high end ones can cool much more effectively with delta-T over 60°. On a cold night, CCD temp with a really good astrocam can get to below -75°. Most cooled astrocams also employ low noise fans to actively cool a heat sink or heat pipe attached to the hot side of the upper peltier and actively exhaust heat...something similar could be done with a DSLR.

Professional scientific grade CCD cameras used in professional astrophotography, microscopy, etc. use much more significant measures to cool. Professional scientific grade CCD cameras are usually cooled to at least -80°C. In some cases, temperatures are pushed below -125°C, and I've even heard of some scientific grade equipment operating in superconducting conditions at nearly absolute zero (however once you move past -80°C, the cost of maintaining temperature becomes excessively prohibitive.)

In the case of a DSLR, at some point I see some kind of peltier based cooling becoming necessary. At some point, we are going to exhaust the material options, when we've employed things like black silicon, color splitting in favor of color filtration arrays, and maybe even some kind of layered photodiode approach to increase maximum charge capacity per pixel. To continue improving (and at that point, low ISO will be about as good as it can get, so all the improvements will have to occur at the high ISO end), without reducing megapixel count, we will need to reduce dark current noise in the electronics themselves. The most effective way to reduce dark current once CDS is employed is to cool the sensor.

Even for a relatively cheap $2000 astrocam with dual-stage peltier cooling, average dark current drops from around 5e- to 0.02e-, and better ones can be had for $4000 to $10,000 where dark current drops to as little as 0.01e- to 0.008e-. At 0.01e-, you release one electron worth of noise for every 100 electrons released by photons. Today, average read noise at high ISO is around 3e- or so, so cooling could gain us a fair amount of real-world high ISO sensitivity. Even at medium ISO settings, where dark current can still be as high as 5-10e-, could benefit from cooling. Extreme cooling could even be an option to reduce ISO 100 noise as well, albeit at a power cost.

On the notion of power consumption, that would certainly be a hurdle to overcome. Power cells would have to be far more efficient, and certainly hold more capacity, than even the most capable camera batteries of today. I suspect some kind of fuel cell technology would need to be employed to make extreme peltier cooling a reality for high ISO shooters. Fuel cell tech has come a long way recently, and I suspect at some point camera manufacturers will probably switch to them anyway. Thermoelectric cooling could be a user-selectable option as well, and the peltier could be activated automatically on demand if it is enabled so that it does not constantly draw power.
Hi,
   There had been quite a few DSLR out there with active cooling modification, the result was very good with very low noise, but it's quite bulky. Also, with active cooling, you will have condensation issue unless you sealed your DSLR and dry the air inside like adding an dehumidifiers.

   Have a nice day.

75
Third Party Manufacturers / Re: Tamron 150-600 f/5-6.3 VC Availability
« on: January 17, 2014, 12:33:38 PM »
I had the pleasure of trying one out and using it this afternoon, - it's in the UK shops folks! LCE pricing it at £1170. It was about the same size roughly as my old Canon 100-400 L lens, the weight was much as I expected it to be, - considerable heavier than my current 400 f5.6L, but not a problem, I hand-held it on a 7D to take a number of shots, it felt nicely balanced and the IS worked well. It focused very swiftly without hunting despite fading light. In short, I want one! But here's the dilemma. I've been told that if I use it on a F/F body the images might be soft at the edges. Someone else said there could be distortion at the edges of the images used on a F/F. Both advised that being an independent brand it might be better to use it on a crop body, despite perhaps, a lower IQ and/or more noise from a cropped sensor. Even more disappointing was the advice to go for the proprietary brand equivalent-range lens on a crop body rather than risk the Tamron, - and this from a sales rep. who was going to be selling it! Whilst I could happily accept the advice to go for the crop body, (if I was really to gain from that, - greater reach but more noise or lower ISO ceiling as against possible soft edges or distortion using a F/F body), being advised that the manufacturers' own lens would be a better bet in respect of IQ (at double the cost) deflated me somewhat, given the hype been given to this lens, and the affordable price. And the sales reps. advising me hadn't tried it for themselves of course. Indeed they might not have personally tried similar long lenses on both crop and F/F bodies to be able to justify their contention. Would be interested in other's ideas on this, before I commit!
Nice shop to avoid....
The lens could be soft at the edges.... unlike the 100-400 which is renowned for a razor-sharp image across the entire view.... NOT!
They say the lens works better on a crop body?!?!?!?!? That would definitely be a first for Tamron if it were true...
Use an equivalent range zoom lens????? Did they say who makes one? How come nobody else knows of an equivalent lens?
And all this from people who have not tried the lens.... WOW!!!!!
Nice shop to avoid!
Hi,
   Of course this lens work better on a crop body... eqv. 240-960mm with AF...  :P

   Anyway, base on the limited online review, I expected this lens will have vignetting at 600mm wide open on FF (I suspect this is the case when they announce that the lens include an image processing software) and I also don't expect it to be sharp at the corner at 600mm on FF also... at this price, I can live with that as long as image quality and AF is good at 600mm...

   Probably will get this lens to replace my 400mm F5.6L + 1.4x TC for birding.

   Have a nice day.

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