76
EOS Bodies / Re: Canon EOS-1D X Manual Posted
« on: June 12, 2012, 12:23:55 AM »
Hi,
Look like no AF at F/8 for 1Dx (Page 81)...
Have a nice day.
Look like no AF at F/8 for 1Dx (Page 81)...
Have a nice day.
May 20, 2013, 02:58:34 AM
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77
EOS Bodies / Re: After DPREVIEW of D800 would you still get the Canon 5d mark iii?
« on: May 10, 2012, 05:51:17 AM »
Hi,
IMHO, Nikon D800 and Canon 5DIII are design for different usage... Nikon D800 sacrifice high iso performance for high resolution while Canon 5DIII sacrifice resolution for high iso performance.
So, what is your most importance requirement? If the answer is high resolution, go for Nikon D800. If the answer is good high iso performance, go for Canon 5DMIII. If you need both, wait or may be you can check with the military equipment supplier... ha ha ha
For me, I'll wait for 7DII, 70D or whatever it's called. If that model doesn't meet my expectation, I'll save the money and get the EF 300mm F2.8L IS II USM.
Have a nice day.
IMHO, Nikon D800 and Canon 5DIII are design for different usage... Nikon D800 sacrifice high iso performance for high resolution while Canon 5DIII sacrifice resolution for high iso performance.
So, what is your most importance requirement? If the answer is high resolution, go for Nikon D800. If the answer is good high iso performance, go for Canon 5DMIII. If you need both, wait or may be you can check with the military equipment supplier... ha ha ha
For me, I'll wait for 7DII, 70D or whatever it's called. If that model doesn't meet my expectation, I'll save the money and get the EF 300mm F2.8L IS II USM.
Have a nice day.
78
Canon General / Re: Light leak from status LED in long exposures 5Dm3
« on: May 08, 2012, 04:05:28 AM »
Hi,
You should try taken another shot with the same setting (may be with body cap on... a dark frame) and see does the red light still there. If it cause by the red LED status light, you should be able to get a repeatable image.
Have a nice day.
This weekend I was taking some long exposures of the sky and saw that there was a red streak near the bottom of the frame, it is the same color as the red status LED that stays illuminated durring the exposure. Is this normal? Can I turn off the status LED? Here is a link to the image:
http://jamesmjohnson.com/~jjohnson/LP8C6653.JPG
I was using a Canon 5D Mark III with the 24-105 zoom.
Jim
You should try taken another shot with the same setting (may be with body cap on... a dark frame) and see does the red light still there. If it cause by the red LED status light, you should be able to get a repeatable image.
Have a nice day.
79
EOS Bodies / Re: How are dynamic range and sensor size related?
« on: May 08, 2012, 02:53:06 AM »
Hi,
I believe the sensor technology gap between Sony/Nikon and Canon is not that big. IMHO,
the Canon sensor are just as good as Sony/Nikon sensor... the different is how they handle the signal and noise.
Here is what I think:
Canon RAW file include the bias signal which mean all the noise (positive and negative) are include in the
data, but Nikon RAW files somehow do not record the bias signal... I think may be Nikon filter out all those data, so only those information (signal and noise) that are above bias level are recorded in the image.
As a result, Nikon sensor perform better at lower ISO as noise below the bias level are not recorded in the image. But as ISO increase, those noise lower than the bias level are now above the bias level, so they are recorded in the image. So at higher ISO, performance of Nikon sensor are now on par with Canon sensor.
Now if you take the above and look at all the review on Nikon D800 and Canon 5D3, it does seem to be the case: at low ISO Nikon D800 perform better than Canon 5D3, but at high ISO, Canon 5D3 perform better due to a larger pixel size (higher signal) compare to smaller Nikon D800 pixel size (lower signal).
Just my $0.02.
Have a nice day.
I believe the sensor technology gap between Sony/Nikon and Canon is not that big. IMHO,
the Canon sensor are just as good as Sony/Nikon sensor... the different is how they handle the signal and noise.
Here is what I think:
Canon RAW file include the bias signal which mean all the noise (positive and negative) are include in the
data, but Nikon RAW files somehow do not record the bias signal... I think may be Nikon filter out all those data, so only those information (signal and noise) that are above bias level are recorded in the image.
As a result, Nikon sensor perform better at lower ISO as noise below the bias level are not recorded in the image. But as ISO increase, those noise lower than the bias level are now above the bias level, so they are recorded in the image. So at higher ISO, performance of Nikon sensor are now on par with Canon sensor.
Now if you take the above and look at all the review on Nikon D800 and Canon 5D3, it does seem to be the case: at low ISO Nikon D800 perform better than Canon 5D3, but at high ISO, Canon 5D3 perform better due to a larger pixel size (higher signal) compare to smaller Nikon D800 pixel size (lower signal).
Just my $0.02.
Have a nice day.
80
EOS Bodies - For Stills / Re: 5D3 Dynamic Range
« on: May 07, 2012, 03:28:03 AM »
Hi,
Just wonder is it the way how Canon record the RAW images that cause this? For example, the dark frame RAW files from Canon 60D include the bias signal data (no light = 2048), while Nikon D700 RAW file remove the bias signal data (no light = 0).
Not sure about how this will affect real life image, but may be this is why Canon images look noisier in the dark shadow than Nikon?
Just my $0.02.
Have a nice day.
Just wonder is it the way how Canon record the RAW images that cause this? For example, the dark frame RAW files from Canon 60D include the bias signal data (no light = 2048), while Nikon D700 RAW file remove the bias signal data (no light = 0).
Not sure about how this will affect real life image, but may be this is why Canon images look noisier in the dark shadow than Nikon?
Just my $0.02.
Have a nice day.
81
Lenses / Re: Going Beyond 300mm... for the birds
« on: March 18, 2012, 09:05:43 PM »
Hi,
I had try the TC 2x III on my EF 400mm F5.6 and it's a lot better than the older version. No Phase detection AF, but still can AF in live view... good for birds that not so active under good lighting.
Anyway, I think an old 300mm F2.8L IS or non IS or even 400mm F2.8L non-IS will be a good choice...
Have a nice day.
I had try the TC 2x III on my EF 400mm F5.6 and it's a lot better than the older version. No Phase detection AF, but still can AF in live view... good for birds that not so active under good lighting.
Anyway, I think an old 300mm F2.8L IS or non IS or even 400mm F2.8L non-IS will be a good choice...
Have a nice day.
82
EOS Bodies / Re: Canon 7Dmk2 any rumors??
« on: March 16, 2012, 02:49:07 AM »
Hi,
7D2 is actually very easy to design... just get the 5D3, replace the FF sensor with a 18MP - 22MP crop sensor and increase to 8fps! That's it and I'm prepare to upgrade from my 60D...
Have a nice day.
7D2 is actually very easy to design... just get the 5D3, replace the FF sensor with a 18MP - 22MP crop sensor and increase to 8fps! That's it and I'm prepare to upgrade from my 60D...
Have a nice day.
83
EOS Bodies / Re: Here we go again: 5DIII vs. D800 raw files head-to-head
« on: March 14, 2012, 10:12:43 PM »
Hi,
Hmm... Is Canon images NR on or off?? My DPP 3.11.4.10 unable to open the RAW file. Nikon images had NR0 to NR3, but Canon images only had one version.
Have a nice day.
Hmm... Is Canon images NR on or off?? My DPP 3.11.4.10 unable to open the RAW file. Nikon images had NR0 to NR3, but Canon images only had one version.
Have a nice day.
84
EOS Bodies / Re: Locking Mode Dial.
« on: March 07, 2012, 05:20:54 AM »
Hi,
Have a nice day.
When I first got my 60D, I wasn't so keen on the locking dial, but after using it a few times, I really like it.I also had the 60D, but prefer not having the lock on the mode dial. I mainly use my 60D for birding and sometime need to take some video quickly which happen to be on the other end of the dial... the lock made switching to video mode quickly an issue.
It's easy to use your pointer on the button then turn with your thumb and middle finger, and this becomes second nature very quickly.
I've also bumped the mode dial accidently on other cameras, so I'm happy the III will have this feature.
Have a nice day.
85
EOS Bodies / Re: I hope 5dx , 45 million pixels
« on: March 03, 2012, 05:29:56 AM »
Hi,
Don't need to hope and wait, get a Nokia PureView 808...
Have a nice day.
Don't need to hope and wait, get a Nokia PureView 808...
Have a nice day.
86
Lenses / Re: Canon 400mm f5.6 L lens - upgrade needed.
« on: February 28, 2012, 10:58:36 PM »
Hi,
I'm a Canon EF 400mm F5.6L user. Although the design is old, but it still perform very well and IMHO, if the price is going to increase for an upgrade, I would prefer Canon leave it as it is.
Super telephoto lenses are expensive and not everybody can afford $2K++ (I'm one of them) for a lenses. So for those who are interested in wildlife or bird photography, but had limited $$, IMHO, this is basically the most suitable lenses out there in the market... fast AF, sharp, light weight and very cheap (compare to other super telephoto lenses).
Anyway, if you look at the pricing of super telephoto lenses, there is a big jump in pricing after EF 400mm F5.6L... may be Canon can put a new super telephoto lenses (eg. a non-DO 400mm F4L IS) at that price level for those who can afford a bit more especially if EF 300mm F2.8L IS is going to be discontinoued.
Have a nice day.
I'm a Canon EF 400mm F5.6L user. Although the design is old, but it still perform very well and IMHO, if the price is going to increase for an upgrade, I would prefer Canon leave it as it is.
Super telephoto lenses are expensive and not everybody can afford $2K++ (I'm one of them) for a lenses. So for those who are interested in wildlife or bird photography, but had limited $$, IMHO, this is basically the most suitable lenses out there in the market... fast AF, sharp, light weight and very cheap (compare to other super telephoto lenses).
Anyway, if you look at the pricing of super telephoto lenses, there is a big jump in pricing after EF 400mm F5.6L... may be Canon can put a new super telephoto lenses (eg. a non-DO 400mm F4L IS) at that price level for those who can afford a bit more especially if EF 300mm F2.8L IS is going to be discontinoued.
Have a nice day.
87
Lenses / Re: EF 300mm f/2.8L IS II USM and DXOMARK.COM
« on: February 22, 2012, 06:57:57 AM »
Hi,
IMHO, it's quite normal... if you look at most review website, wide to standard lenses usually had a higher measured resolution than a super telephoto lenses. The main factor is distance... when shooting at the same test chart, super telephoto lenses need to be a lot further away to achieve the same field. The increased distance mean more air in between the lenses and that'll reduced the measured resolution.
As for EF 300mm F4L IS USM vs EF 300mm F2.8L IS II USM, The DxOMark wesite state that: "The DxOMark resolution score shows resolution performance of a lens-camera combination averaged over its entire focal length and aperture ranges." EF 300mm F2.8L IS II USM might have a slight "disadvantage" since it start the measurement at F2.8. Anyway, I look at the DxOMark MTF chart, EF 300mm F2.8L IS II USM is still perform better than EF 300mm F4L IS USM at F4.0.
Just my $0.02.
Have a nice day.
I post this on rumors because DXO has created a rumor.
I find a test of the new EF300mmf/2.8LISIIUSM on:
http://www.dxomark.com/index.php/News/DxOMark-news/A-good-if-heavy-and-expensive-lens-the-Canon-EF-300-f-2.8L-II-USM
Who can explain that DXO find the resolution of the old EF300mmf/4.0LISUSM is better?
Why Canon don't react at this point?
Are the FTM curve of CANON a joke?
If on dxomark, you compare the EF300mmf/2.8LISIIUSM with a zoom like the 24-105L, you can observe that the resolution of the zoom is also better. Very strange
What is your opinion?
IMHO, it's quite normal... if you look at most review website, wide to standard lenses usually had a higher measured resolution than a super telephoto lenses. The main factor is distance... when shooting at the same test chart, super telephoto lenses need to be a lot further away to achieve the same field. The increased distance mean more air in between the lenses and that'll reduced the measured resolution.
As for EF 300mm F4L IS USM vs EF 300mm F2.8L IS II USM, The DxOMark wesite state that: "The DxOMark resolution score shows resolution performance of a lens-camera combination averaged over its entire focal length and aperture ranges." EF 300mm F2.8L IS II USM might have a slight "disadvantage" since it start the measurement at F2.8. Anyway, I look at the DxOMark MTF chart, EF 300mm F2.8L IS II USM is still perform better than EF 300mm F4L IS USM at F4.0.
Just my $0.02.
Have a nice day.
88
Lenses / Re: 36+ Mp EOS dSLR (rumored): How do existing EF lenses cope?
« on: February 10, 2012, 06:09:30 AM »
Hi,
I just wonder whether anyone notice that a 36MP DSLR (eg. Nikon D800) might face a very practical usability issue... the size of a 36MP RAW file and the time for a 75MB RAW file to write to the memory card. Even at the current highest write speed card of 100MB/s (assume the DSLR is able to write at maximum speed and a RAW file is 75MB), it'll took Nikon D800 3s to write 4 RAW files to the card and current price of high capacity, high speed CF card is not cheap.
Have a nice day.
I just wonder whether anyone notice that a 36MP DSLR (eg. Nikon D800) might face a very practical usability issue... the size of a 36MP RAW file and the time for a 75MB RAW file to write to the memory card. Even at the current highest write speed card of 100MB/s (assume the DSLR is able to write at maximum speed and a RAW file is 75MB), it'll took Nikon D800 3s to write 4 RAW files to the card and current price of high capacity, high speed CF card is not cheap.
Have a nice day.
89
Third Party Manufacturers / Re: D800 - Sample Photos
« on: February 07, 2012, 12:37:15 PM »
Hi,
Anyway, just wonder how long will the user willing to wait for the photo to be written to the card before removing the card? At 36MP (74MB RAW file), shoot continous for 1s @ 4FPS = 4 x 74MB = 296MB and will took the DSLR at least another 1.96s to write to the cards if you use the US$800++ (100MB/s write speed) SanDisk Extreme Pro CompactFlash Card... SanDisk must be very happy now!
Have a nice day.
36MP+ FF sensor... no problem to Canon as they already had a 120MP APS-H sensor 2 years ago...and how many couples order billboard prints?
if i read here in this forum i wonder how there can be room on this little planet for all the big prints people do.
I regularly print 62" wide fine art landscapes - and sometimes bigger - for gallery and corporate sales. I use PrefectResize/Genuine Fractals to get the image sizes I need... but I'd prefer to have more pixels provided natively out of camera and less stretching to do in post.
Because of this I, for one, see a huge need for 36MP+ in a FF sensored body, so long as the quality isn't compromised and I'm sure many other fine art landscape photographers agree. Now Nikon is proving it can be done.
My curiosity is certainly piqued.
Anyway, just wonder how long will the user willing to wait for the photo to be written to the card before removing the card? At 36MP (74MB RAW file), shoot continous for 1s @ 4FPS = 4 x 74MB = 296MB and will took the DSLR at least another 1.96s to write to the cards if you use the US$800++ (100MB/s write speed) SanDisk Extreme Pro CompactFlash Card... SanDisk must be very happy now!
Have a nice day.
90
Third Party Manufacturers / Re: D800 is finally here
« on: February 07, 2012, 07:06:19 AM »
Hi,
36MP... 75MB RAW file... storage manufacturer must be very happy now... more high capacity card and hard disk sales...
My 2TB hard disk free space is already running out at a very fast rate with my 18MP only 60D and I only shoot on weekends (mostly photos and some video), can't image how large the hard disk I'll need if I had a 36MP digital camera.
Have a nice day.
36MP... 75MB RAW file... storage manufacturer must be very happy now... more high capacity card and hard disk sales...
My 2TB hard disk free space is already running out at a very fast rate with my 18MP only 60D and I only shoot on weekends (mostly photos and some video), can't image how large the hard disk I'll need if I had a 36MP digital camera.
Have a nice day.