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07/04/2007 11:40:09 AM · #1 |
I i've been reading alot on the subject and i was thinking of buying a Sony alpha a100. I read alot of reviews and opinions on this camera. but i wanted to have a hands-on opinion of how its seen on the DSLR global market. as i think you know, sony bought off Konica-Minolta's branch of photography and came out with its 10m pixel, CCD sensor, body-integrated anti-shake. Consequently, the bayonnet mount allows not only new sony lenses to be attached, but also the konica minolta's lenses.
I've read alot of good reviews on this camera and all its specifications (cameralabs.com, dpreview.com) but what i thought was a concern what its high noise levels at high iso (800 and 1600).
Also, a photographer at futureshop told me to opt more for the canons (xt or xti) or the Nikons(d200, d80, d40x), because of the sensor and because of the anti-shake. he argued that sony's integrated anti-shake manipulates the sensor, physicaly speaking, to stabilize the image and consequently does not provide the "real" picture. He also said the CMOS sensors will be used in future generation models and that CCD ones arent as good quality
i read reviews that CCD sensors have an advantage over CMOS becacuse the design of the CMOS: they have individual transitors for each pixel, and when a picture is taken some of the light hits the transitors and does not provide as good quality imaging as the CCD
The CCD might take more power to use, but compromises less on the image quality.
I was wondering your point of view on this type of camera.
i'm looking into getting into photography as a hobby. portraits, action shots, landscapes, still objects, telephoto pics: generaly everything...
this would probably consists of a long term investment
thanks for your time
Milosz |
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07/04/2007 11:54:30 AM · #2 |
This was a good camera when introduced, getting a bit old now. Personally I'd stick to the Nikon/canon.
One thing you always underestimate when you buy your first DSLR: you focus on the body, but the most important thing is the whole system that you are buying. Eventually the accessories are going to be the bulk of your budget. You're much more likely to change body a couple of times in the future than your entire upcoming collection of lenses and other accessories. So by going with nikon or canon, you're sure not to make a bad choice.
Message edited by author 2007-07-05 03:11:16. |
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07/04/2007 11:59:52 AM · #3 |
I'll only comment on the technical aspects of what you were told.
First, whether anti-shake is implemented in the lens or in the body should make no difference at all in how well it cancels shake. What was the dude at futureshop talking about "real picture." I have no idea.
CCD and CMOS both can produce excellent images. They are different technologies, and both have benefits and issues. In the not-too-distant past, CMOS *was* considered an inferior technology. But developments in this area have brought CMOS sensors to predominance in the DLSR marketplace, even at the high end. You don't get there without stellar image quality. All of Canon's DLSRs use Canon CMOS sensors, and their overall image quality is arguably the best in the business, especially at high ISO.
There's a *lot* more to a camera choice than the sensor technology. Remember that you're buying into a system, and you need to consider the lenses and other accessories that you will want/need. Look at availability, quality and cost. Also look at specific camera and lens features that may be important for the type of work that you will be doing. |
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07/04/2007 12:10:27 PM · #4 |
Originally posted by milosz:
Also, a photographer at futureshop told me to opt more for the canons (xt or xti) or the Nikons(d200, d80, d40x), because of the sensor and because of the anti-shake. he argued that sony's integrated anti-shake manipulates the sensor, physicaly speaking, to stabilize the image and consequently does not provide the "real" picture. He also said the CMOS sensors will be used in future generation models and that CCD ones arent as good quality
i read reviews that CCD sensors have an advantage over CMOS becacuse the design of the CMOS: they have individual transitors for each pixel, and when a picture is taken some of the light hits the transitors and does not provide as good quality imaging as the CCD
The CCD might take more power to use, but compromises less on the image quality.
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I always harp on futureshop because alot of the employees there don't know alot and lie to other customers then they come to my work and tell me all this wrong information that they were told at futureshop, so they go return the camera there and buy from me :)
anyways,
I would recommend Canon 30D or Nikon D80 or D200. the D40 is a nice small body but it does not offer a autofocus motor, so your future lens selection is limited because the D40 will only autofocus with the Af-s lenses because they have an autofocus motor in them.
and Sony's image stabilization is Sensor shift, so yes he is correct.
as for CCD vs. CMOS, there really isn't much different between image quality. main difference is that CMOS sensors don't take as much power, therefore offering less noise when shooting higher ISOs, so you get a cleaner shot. |
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07/04/2007 12:11:21 PM · #5 |
in the technical aspect, the future shop guy, i think he meant by the "real image" is that sony's anti-shake is integrated by moving accordingly the sensor, therefore the image that is buffered by the lenses that hits the sensor isnt perfect because of the moving sensor...in contrast anti-shake in lenses buffers the image so that when it hits the sensor, it hits it exacly as the lense sees it
as for the cmos vs ccd. there obviously alot dilemna that i have read about on this subject...nevertheless, if we put it into a context:
say that you can buy a sony alpha or a canon d200
and lets assume both are available in cmos and ccd...which would you choose and why?
thank you
Message edited by author 2007-07-04 12:11:57. |
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07/04/2007 12:27:57 PM · #6 |
Here's a noise review comparing the Sony DSLR-A100, Canon EOS-350D, Nikon D200 and Sony DSC-R1. Noise is noticeable and detail gets reduced at 800 and above. The anti-shake helps at longer exposures and longer lengths where a tripod and/or monopod isn't/can't be used. My 1st attempt at racers. This was with my 70-200 at 200mm, f/7.1, 1/250 ISO 100 (anti-shake was on). Those cars were shaking, not me, lol.
Canon and Nikon have a wider selection of lenses. Not that a good bayonet mount lens is tough to find. Sigma, Tamron, Tokina, Minolta and Sony all make lenses for the bayonet mount.
Message edited by author 2007-07-04 12:29:07.
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07/04/2007 12:30:43 PM · #7 |
Originally posted by milosz:
in the technical aspect, the future shop guy, i think he meant by the "real image" is that sony's anti-shake is integrated by moving accordingly the sensor, therefore the image that is buffered by the lenses that hits the sensor isnt perfect because of the moving sensor...in contrast anti-shake in lenses buffers the image so that when it hits the sensor, it hits it exacly as the lense sees it |
Huh?
Not sure I understand what the difference really is. In lens-based stabilization, a group of elements is moved so that the image exiting the lens remains stationary despite camera movement. In sensor-based stabilization, the image exiting the lens still moves with camera shake, but the sensor "follows" it, and agian the result is a stationary image with respect to the sensor.
Either system can, in theory, give a great result. How a particular system performs in practice is a function of its design parameters.
Originally posted by milosz:
as for the cmos vs ccd. there obviously alot dilemna that i have read about on this subject...nevertheless, if we put it into a context:
say that you can buy a sony alpha or a canon d200
and lets assume both are available in cmos and ccd...which would you choose and why?
thank you |
The one that produces the best image quality for *my* work. I don't really care what technology is used, all I really care about is the output. For a number of my uses, low-light performance and high-ISO noise performance are critical concerns. That's one reason I chose the Canon system (among others). |
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