« on: July 06, 2012, 02:12:25 AM »
It is actually not the only issue with t4i
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.
i think it is quite a useless option.
it's not entirely useless
if the reduced file size of the images can give a faster FPS burst and deeper sustained buffer
ie the camera detects the lens and only processes an APS-C sized image from the sensor resulting in smaller data for each image but can still use the full processing power this sort of function would be pretty handy for action shooters I would think
Small sensor are more dense, this is one of the reason why you need shorter time comparing with FF. Another reason is that since you are vieving/printing images in the same way, the images of crop sensora are mignified more this mignifies blurr as well.
The general rule of thumb is your shutter speed should be at LEAST 1/focal length. So if you shoot a 200mm lens, your shutter should be at LEAST 1/200. If you really want to be safe, you should at least double that speed. That is why IS is so important.
Dont forget the crop, so on a crop a 200 it should be a minimum of 1/320.
Perhaps, but I'm not entirely convinced a crop body would matter. The crop is just that: a crop. if you take a photo in photoshop and crop down to the center 60% of the pixels, it doesn't make the photo blurry. So I don't see why cropping in the camera with a smaller sensor would require a faster shutter speed. The crop sensor affects the apparent field of view, not the actual focal length, or the magnification. It's just putting more pixels in a smaller space. Now, if a higher pixel density is what requires a faster shutter speed, that would make sense. Since a smaller movement will be picked up by the smaller pixels. But then that would apply to high MP FF too, not just crop.
So I feel it might not be totally correct to just assume a crop body needs a higher shutter speed. Right? Its not the size that matters, its how you use it!
Touch wood I've never left anything at a job or had any gear lost/stolen. But given that 99% of people are pretty honest, I put my phone number on every bit of gear from bodies to light stands. If you picked up a Pocket Wizard with a phone number on it, what would you do? Some mongrels would pocket the item but by far the greatest majority would make the call.
Put your number on everything. I use a label maker. At least you're in with a good chance!
every eos camera has an AF sensor, since eos film times.Quote7d has a separate processor JUST FOR AF... the 5d3 doesn't.
The 5D Mark III has a dedicated processor for the AF:
From the Canon site (and many many other sites)
Both the 1D X and the 5D Mark III use dedicated AF microprocessors; these AF microprocessors are not DIGIC chips. The increased sensitivity of the focus system has also allowed for faster predictive focus measurements. Increased processing power is another factor to the 5D III's excellent AF performance - "The dedicated AF processor is four times faster than the one found in the EOS-1D Mark IV.
Also my 5D mark III is very close to 6 FPS.
Not sure why his 5D mark III is slow !! , make sure noise reduction is also off and battery fully charged.
Noisy images at 100 ISO !!!! , please post sample images so that we can see what is wrong.
If your 7D output is less noisy then for sure something is wrong.
Fair enough that the 5d3 has a microprocessor, although unspecified by canon, it is unknown what the power that processor is compared to a full digic. As far as it was explained to me, the 7d's drive was aided by 2 digic 4 processors, much like the 1d4's 2 processors helped that AF system and drive. The 1dx also has 2 digic 5+ processors to help that drive and buffer. The 5d3 has 1 digic 5+ processor in comparison to the 7d and 1d4 and 1dx 2 digic processors. It has been hinted that the 5d3's 1 processor should be (in af terms) be as good if not better than the 1d4 although it lacks in FPS and buffer, it is what it is.