[cokes]

睇今期睇數碼雙周有介紹下呢個Four Third System，我覺得佢個慨念幾好，全新咁發展過DSLR，對好似富士或其他一D無鏡頭生產既廠黎講，其實幾好，好似話可以共用其他廠既鏡頭添。
不過有用開SLR既用家，同埋CANON同NIKON，一定唔會放棄佢地原本既鏡頭同鏡頭市場，而且成本相對較低，但始終佢亦有佢既問題，好似焦距要X1.6咁。你地覺得Four Third System會掂嗎? 好似暫時得OLMPLUS出機，一或都係大廠，係不久將來可以因科技發達同成本下降，解決到現時DSLR既問題呢?

[Velsper]

其實nikon咪做左相同既野, (canon就係部部機唔同 crop factor)
不過重多鏡頭支援咁解
x1.5/1.6 掉轉諗咪同4/3一樣. (4/3 係 x2)
而且以e1睇更加唔係平.
所以o記忠實fans可以多留意一會先下手.


>>好似話可以共用其他廠既鏡頭添。
係指如果有其它廠都發展4/3鏡頭///

[6x4.5]

唔同唔同,講緊係一個新既system同standard

鏡頭接還係standard既, Olympus明顯好想其他廠加入
我睇英國Amuter Photography,話Kodak同Fuji話有興趣(不過就無話會出機)
個人覺得Kodak好有機會,因為咁多年kodak都要用人地既Body

Four Thirds係無crop factor的, 因為佢係FULL FRAME, frame size係 35mm既一半, 所以鏡頭都係要x2, 咁唔可以話係 Crop
正如DC個CCD細,焦距短,你都唔會話佢有crop factor

只係睇E-1既Body Construction,佢同EOS 1D/DIH一樣係metal body
有environmental seal, 咩10D, D100根本無得比, 其實好抵買

惟一既問題係太少鏡(得Olympus 出,已且唔平),我己經儲緊錢^^

[6x4.5]

個人認為, Fuji 等左咁耐都未出S3PRO
係米會出4/3 system呢?
加埋出年Minolta又話會出DSLR

出年定會好熱鬧!

[老叟]

好唔好,或者實唔實用依家都係言之過早!!
不過佢我唔入地獄誰入地獄既勇氣,真係好野!!
希望佢創舉成功喇!!

[daimonster]

日本工業新聞
http://www.jij.co.jp/news/car/art-20031112195827-NOKUBIISNC.nwc

OLYMPUS預定在明年出

初心者對象10万日圓前後、
中・上級者對象20万日圓以下

的2部4/3系統DSLR

機身价錢始終會跌, 但個人覺得鏡頭現只有Zuiko optic自家製才是問題, 尤其它X2.0的FOV令廣角鏡成本大增. 既然E1塊CCD都係Kodak做, Fuji又冇自己body同lens system, 不如快D叉埋隻脚入4/3 system度壯大聲勢讓Tamron, Sigma等外廠願意為其出鏡. 等大家多個選擇.

[Dynax6]

唔會吧

4/3 system既然係Full frame, 2X FOV應該不會有問題吧
以前APS SLR system 一樣有ulta wide

不過多幾個廠出機身和鏡頭對用家一定係好事

[mini_mashimaro]

唔好意思啊! 我想問咩係4/3系統DSLR 呀，呢個系統同平時有咩唔同?
有咩好處呀?
hx^^

[Hercules]

I'm quite disappointed with DCfever discussion board with argument everywhere, but I have to say something about 4/3 for clarification.

Kodak will have own 4/3 DSLR on 2004, DCS-14n Pro is their first custom made Mg body DSLR (other electronic, focus system is transfer from Nikon), so it's no problem to make their own body. And Olympus will have consumer version of E-1 in 2004, the price tag is around $10K.

There are no crop factor, multipier (2x) in 4/3 system,
every 4/3 body are full frame and make use of full projection circle on sensor. the 2x is just 35mm equiv focal length for easy reference.

As 4/3 is non-interchangable with 35mm, unlike 35mm format lens in DSLR and film body, will have difference coverage on film and CCD/CMOS, so the muitiplier is add for reference to 35mm FF equiv. focal length.

For the wide, it's not neccessary to be costly, Olympus will have 11-22mm in 2004 1st qt. let's do some calculation. a Tarmon 19-35/3.5-4.5 is only cost $1400 in market. if we have a 35mm format wide lens with f4 maxmium aperture, we do realign the projection circle thatall the light entered with aperture F4 that project on a 4/3 sensor, that's only 1/4 size of 35mm FF, the light intensity by area is 4 times of 35mm ff, so the equiv. Aperture is F1.4 on 4/3 system!! so the material to make a F2.8 wide lens on 4/3, that's equal to a F5.6 lens in 35mm format.

The problem of current 35mm based DSLR is the lens range, for consumer DSLR body, no existing single 35mm lens can fit the common and useful standard zoom range (24/28~85/105mm), maybe need 2 lens to cover the range with extra cost. and if the DSLR is not full frame, the small viewrange and change of focal lenght after mounted on DSLR, will making confusion to film based user that share exisiting lens on film body. 4/3 have 14-55/2.8-3.5 that cover 28-110mm range, first time to realize one lens with one body for all round shooting.

The only solution for crop factor in 35mm based DSLR is Digital speicific lens for DSLR, but it smaller projection circle and dim on edge of circle make the lens unusable on film body or even throw it away when using in FF DSLR, actually just like buying lens solely for DSLR, like 4/3 lens, but no interchangable between difference manufacturer, it's other trick for Canon/Nikon that if you when to keep the lens system, what you can buy next is their body again. 4/3 system will give more choice on lens and body from different manufacturer eventually.

It's good to have new standardize format for DSLR, in lens interchangability, sensor size, mounting, and in any aspects, other than stick with 35mm based that is not FF (I think the right time for migrate and buy 35mm DSLR for exisiting film based user when FF is common and economic enough) as 35mm is standard on film only, fool enough to stick with it.

For new user with no lens burden, it's no way to go with 35mm based DSLR that no standard at all, changing lens specification and cropping factor from body to body. even if you want to have high image quality on film, if money is not the concern, no way back to 35mm format, go to 120 format.

So for evaluate of a new format, with the old vision of 35mm format, it's not wise enough, if you not really sure and understand the reasons behind.

The E-1 is big hit in japan and taiwan now, see the forum for more info.

http://www.photosharp.com.tw/forum2003/topic/topic.asp?forum_id=27&code=20030616000041&fPage=1&page=1

[@香港熊@]

E1最大的敗筆就是貴,雖然機身近乎pro,不過d人見到個價都掉頭走,再者noise 控制不如其他dslr,如果$13000就差唔多

[Hercules]

HK bear you should see the latest picture taken by production unit of E-1, if you still stay the impression in old dpreview sample.... what's a pity...

[6x4.5]

production unit 既noise小左好多呀
Dec Practical Photography- E1既image quality俾左93, 高過D100 (86), *istD (90) 同S2 (91)

[AthlonFX64]

Hercules 兄, 請問你說的 4/3 是 full frame, 是不是指用的鏡頭已設計成把影像剛好成像於 sensor 同樣大小? 但係你又話有個 2x 的 multiplier, 咁係咩原因呢? 請指點.

[Hercules]

Olympus actually do all the fine tuning on CCD before put into market with actual sales, unlike Canon using marketing trick make a hit big but a lot of technical problem follow behind after sales, as everybody stepped into the trap already and no way out.

Olympus is not really willing to release the trial unit sample as it's still on the way of tuning, but the market just focring them to have exposure and noise floating around as long delay making rumour of E1 and 4/3 system is another "Vaporware".

6x4.5, are you 6x4.5 in r33?

[6x4.5]

行不改姓,座不改名,唔識分身,r33個6x4.5係我
英雄請報上名來^^

順答Athlon兄,係,鏡頭已設計成把影像剛好成像於 sensor 同樣大小
但係但sensor既size係35mm既一半呀