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Sony DSC-R1 的測試報告 (這台值得買喔!!)

 
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Louis
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註冊時間: 2005-05-20
文章: 65

發表發表於: 星期二 九月 13, 2005 4:20 pm    文章主題: Sony DSC-R1 的測試報告 (這台值得買喔!!) 引言回覆

DPReview 刊登了 Sony Cyber-shot DSC-R1的測試報告
性能方面 與Canon EOS 20D相近
唯一比較嚴重的缺點是 High ISO時的Noise較高
尤其是暗處的Noise
感覺上是由於Sony 使用較高的Gamma值 以及 Sharpen
若是 Sony 修改 Image Porcess的參數, 可能可以獲得改善


Luminance noise graph

Sony DSC-R1 的 Sensor Pixel size 較 Canon 20D 小
有這樣的Noise Performance 算是相當不錯了

就解析度而言 Sony DSC-R1 是 1900 LPH
大於 20D 和 350D的 1850 LPH 以及 300D 的 1800LPH
表示 Sony DSC-R1 Sensor 的解析度確實不錯
不像Kodak 14n 14MP 的解析度 比Canon 1Ds 11MP 還差

Sony DSC-R1 用 Carl Zeiss 24~120 mm(equiv) F2.8-4.8
相當於Canon 20D 用 15~75mm F2.8-4.8
假如Canon 當真出了一個這樣的鏡頭
肯定得是一個 L 鏡頭, 至少也要 $2000
而且一定又大又重

花$1000買一個 Sony DSC-R1 一定比Canon L 鏡頭輕 且小
Carl Zeiss 的鏡頭 效果一定又比 Canon L 鏡頭好
花大錢去買Canon 的廣角鏡頭 還買不到好的
Canon 的 16~35mm F2.8 和 17~40mm F4 實在太令人失望了
還不如買一台 Sony DSC-R1 當廣角鏡頭用
又便宜又好, 也不用換鏡頭了

還好我沒有買 Canon 17~40mm 和 24~70mm的鏡頭
我只要再買一個 Sony DSC-R1 就全部搞定了
15mm 到 75mm 的焦段就完全Cover 了

詳細的測試報告請見:
http://www.dpreview.com/articles/sonydscr1/page10.asp
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Ma Yu
Member


註冊時間: 2005-05-25
文章: 753
來自: China

發表發表於: 星期二 九月 13, 2005 8:24 pm    文章主題: about sony 引言回覆

Louis, yes or no.
I said to you "to get one" was joking because I thought you won't do it. But when I realize you may want to buy one, then I have list good and bad aspects of it since I have Sony 828.

Good part;
Carl Zeiss lens ( may not made in Germany, but carry the name) is sharp;
the extra emerald color makes picture vibrant (especially for landscape picture).
It is very good for portrait and flowers (but not as good as 100mm macro lens can do).
You don't (can't) change lens, so dust won't get in.
$1000 tag is good (that why I had it before as my first digital camera to test water).

Bad part: the purple fringe is a big problem;
noise is high even at ASA400;
operation is slow, can't take wedding ceremony or reception pictures ( because I try it even with dedicated sony flash unit).
Can't take picture when you are not standing still.
But it can be a supplimentary camera with your Canon.

Ma Yu
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Louis
Member


註冊時間: 2005-05-20
文章: 65

發表發表於: 星期三 九月 14, 2005 9:14 am    文章主題: 引言回覆

Dr. Ma,

Some of the issues of Sony F828 has been resolved by the new design. One major problem with Sony F828 is the small CCD sensor. It is now replaced by a much bigger CMOS sensor.

CMOS sensor has the advantages of faster read out and lower leakage current.
Faster read out speed enable the camera to has higher burst continuous shot speed. When the camera has high pixel count, CMOS sensor is the way to go.
The lower leakage current enable the camera to have long explosure time without much noise.

I don't worry much about the noise issue of the new Sony DSC-R1. I think the high noise for the black noise can be improved by modifying the in-camera software. I think the noise performance of Sony DSC-R1 is similar to 20D.

There are things I do worry about:
1. The electronic view finder (EVF)
It may have problem during real dark environment
(Night shot), and when light suddenly change.
2. The focus speed.
All the digital SLR use auxiliary delicate focus sensor
for auto focus. It is not clear to me what Sony use
for focus sensor. If the focus speed is slow, it could
be a serious problem. Actually, I believe the slow
shooting speed of Sony F828 is mostly due to its
focus speed

I am very dispointed at Canon's wide angle lenses.
EF16-35 F2.8L is too expensive and range is too small
EF17-40 F4L has too small aperture. F4 for a new lens??
It is not an upgrade. It is a downgrade!!
I actually bought the lens once and I returned it.
I just don't think it is expressive.

We need somebody to compete with Canon and Nikon.
Somebody can really kick their ass and give them some lesson. I think Sony is doing this very well.

We plan to buy Sony DSC-R1 to cover wide angle range.
But we will wait until we have clear idea of the EVF and focus performance before we buy it. I think it will be early next year. Do you want to buy one as well?
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Ma Yu
Member


註冊時間: 2005-05-25
文章: 753
來自: China

發表發表於: 星期三 九月 14, 2005 8:52 pm    文章主題: About new sony 引言回覆

Louis:
EVF is a problem for sony 828, so hard to see during bright light and the view window is so small, but of course, it can be helped by using autofocusing. Otherwise, I don't know how to shot with sony 828. All the wide angle lens are designed this way. My Extra 25mm lens is F4.0, so is my Hassy 40mm wide angle lens, F4.0, and even my Xpan is F4.0. I assume it is optical design that F2.8 become too much both in $ and making them. Sony 828, of course, is F2.8. God knows why end up like this. One solution, Canon 5D and 1Ds-Mark II has full frame, so 17-40mm EFL can be a true wide angle lens. That what I am waiting for. I'll use 20D for tele lens, and 5D for wide angle lens.
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Louis
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註冊時間: 2005-05-20
文章: 65

發表發表於: 星期四 九月 15, 2005 9:09 am    文章主題: 引言回覆

So, you decided to get a 5D??
I think it is a little too expensive.
Canon should think about a way to reduce the price.
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