Pentax 645D VS Phase One P40+

SSSL

Details as follows-

http://www.luminous-landscape.co ... mat_shoot_out.shtml

Conclusion

In this field-test at least, there is nothing to separate the cameras beyond the Pentax 645D’s superior

high ISO performance.

SSSL

Details  as follows-

http://www.luminous-landscape.co ... _first_review.shtml


Conclusion....and what's to come

The 645D has changed the landscape of medium format digital.  Pentax has given us the best handling MFSLR at the lowest price thus far. Image quality is excellent, and the high ISO is very usable.  The Mamiya DF and Hasselblad H bodies have suddenly started to look very long in the tooth.  All is not perfect, because Pentax really needs to release a full line of digitally-optimized lenses.  The 55mm SDM is but a start, and a few question marks hover over the quality of their 'legacy' lenses.  

All in all, however, Pentax has done a good job. The 645D is a photographer's camera.  And that's the highest praise there is.

SSSL

http://hk.apple.nextmedia.com/te ... amp;art_id=14656433


發哥依家都玩PENTAX645D

發哥有品味

唔係C記,唔係N記,唔係L記,
而係PENTAX645D, 發哥果然識貨又有品味!

發哥以前話不做數碼機代言人, 但用開Pentax 67II , 始終有感情. 做吓Pentax順手代言人也就不計較啦.

發哥身價咁貴,正式做代言人,摺成未必捨得比咁多錢.

SSSL

Details  as follows-

http://dc.watch.impress.co.jp/do ... 0100604_371978.html

SSSL

With an adaptor for Pentax 645,the following lens can be used for Pentax 645D --

Pentax 67,Hasselblad,Leica M visoflex,Carl Zeiss Jena 6x6,Rollei SL66, Linhof 69 and 45 lens (with modification).

These lens are good for landscape photography.

In fact,I have had the above lens for my Pentax 67 II body.

SSSL

Given the short life- cycle of digital product and the success of Pentax 645N,

I think Pentax may soon launch Pentax 67 Digital with 80MP for the large format photography market.

This will then be welcomed by most of the landscape photographers.

cap

看了一些比较资料，唔多明白点解唔用同一个设定做比较

一个
Pentax : f11, 1/4sec, iso 100.  Phaseone : f8, 1/5sec, iso 50

另一个
Pentax : f16, 1/4sec, iso 200.  Phaseone : f8, 1/60sec, iso 100

奇怪？

koppie

原帖由 SSSL 於 2010-11-21 08:51 AM 發表
Given the short life- cycle of digital product and the success of Pentax 645N,

I think Pentax may soon launch Pentax 67 Digital with 80MP for the large format photography market.

This will ...

The sensor for 645D is only 4.4 x 3.3, and you think the next one will jump to 6x7 skipping the true 6x 4.5? I don think so...
I guess their next sensor should be 5.3x5.4,  5354

SSSL

Details as follows -

http://www.dpreview.com/news/1008/10083101canonlargestsensor.asp

TOKYO, August 31, 2010—

Canon Inc. announced today that it has successfully developed the world's largest*1 CMOS image sensor, with a chip
size measuring 202 x 205 mm.

Because its expanded size enables greater light-gathering capability, the sensor is capable of capturing images in one one-hundredth the amount of light required by a professional-model digital SLR camera.

At 202 x 205 mm, the newly developed CMOS sensor is among the largest chips that can be produced from a 12-inch (300 mm) wafer, and is approximately 40 times the size of Canon's largest commercial CMOS sensor.*2

In the past, enlarging the size of the sensor resulted in an increase in the amount of time required between the
receiving and transmission of data signals, which posed a challenge to achieving high-speed readout.

Canon, however, solved this problem through an innovative circuit design, making possible the realization of a massive
video-compatible CMOS sensor.

Additionally, by ensuring the cleanest of cleanroom environments during the production process, the sensor minimizes
image imperfections and dust.

Because the increased size of the new CMOS sensor allows more light to be gathered, it enables shooting in low-light
environments.

The sensor makes possible the image capture in one one-hundredth the amount of light required by a 35 mm full-frame CMOS sensor, facilitating the shooting of 60 frame-per-second video with a mere 0.3 lux of illumination.*3

Potential applications for the new high-sensitivity CMOS sensor include the video recording of stars in the night sky and nocturnal animal behavior.

Through the further development of distinctive CMOS image sensors, Canon will break new ground in the world of new image expression, in the area of still images as well as video.

SSSL

Details as follows -

http://www.dchome.net/viewthread.php?tid=957707&highlight

SSSL

http://www.pentaxforums.com/

New Pentax 645 wide-angle hinted at by Ned Bunnel posted on 11-23-10 in Pentax News

In his recent interview with the Online Photographer, Ned Bunnell hinted at the forthcoming release of a D-FA 25mm
F4 lens for the 645D.  

While complete specs for the lens haven't been leaked, we expect this lens to feature SDM as well as weather sealing,
just like the current 55mm F2.8 lens.  

The 25mm will only support the cropped sensor on the 645D, and as such, it won't be usable on the film 645 bodies.

Its field of view will correspond that of a 33mm lens on the 645 film system, or a 14mm lens on the Pentax APS-C
DSLRs (about 92 degrees diagonally).

fap

原帖由 SSSL 於 2010-12-1 08:47 PM 發表
http://www.pentaxforums.com/

New Pentax 645 wide-angle hinted at by Ned Bunnel posted on 11-23-10 in Pentax News

In his recent interview with the Online Photographer, Ned Bunnell hinted at ...

This 645 wide angle lens was long shown in the Pentax Lens roadmap and also display at CP+ early this year

http://dc.watch.impress.co.jp/img/dcw/docs/354/026/html/pentax_28.jpg.html


It is old news.  No need to be hinted by Ned Bunnel.

SSSL

Details as follows -

http://www.dpreview.com/news/1012/10120308pentax645d.asp

The $10,000 camera is the highest resolution camera ever to be pointed at our test subjects and its huge 44x33mm
sensor has certainly done an impressive job .

SSSL

Details as follows -

http://qicai.fengniao.com/207/2071098.html

SSSL

It is not suggesting that Pentax 645D could beat others in a real head to head, but you do need to make it at least
competitive !

But it is admitted that Pentax 645D sounds like a good entry into the Medium-Format market,if for no other reason
than it might put some price pressure on the others.

The benefits for all of us will be that Pentax will sell more cameras, make more money, have more R & D money, and
come up with better cameras.

The circle will be unbroken again to provide continued support and future models.

Time will tell, but it is definitely excited to see how well that Pentax has jumped into the ring !

SSSL

Reviewed by Mat Gallagher,details as follows -

http://www.whatdigitalcamera.com ... ax-645d-review.html

Pentax 645D review - Verdict

The 645D will no doubt attract a niche audience, though its almost- £10k price tag is firmly out of reach for the
majority.

The experience of using a medium format digital camera is very different from a DSLR and has many advantages,
especially for landscape photographers.

To be clear:

the 645D is less of a studio camera than its competition, but its weather-sealed single body design firmly fixes it as one
to use in the field or where large, resolute files are a must.

However the vertical run shutter, non-customisable construction and no tethered shooting ability may pose issues for
certain users.

However its handling is a winner and easy to pick up.

For general use a pro-level DSLR still has more versatility but, so long as speed's no issue, the Pentax 645D is a pleasure to use

Scores

Design 17/20
Image Quality 19/20
Performance 16/20
Value 17/20
Features 18/20
Overall Score 87%

SSSL

DxOMark has published the RAW sensor evaluation.

Details as follows-

http://www.dxomark.com/index.php ... sensors/Pentax/645D

Yes, that's a Kodak CCD hiding inside!

And where does that put the 645D sensor in the overall rankings at DXOMark?

Here are the DXoMark Sensor Rankings -

http://www.dxomark.com/index.php ... sor/Sensor-rankings

Some "pre-filled" comparisons

Pentax 645D vs Phase One P65+ vs Hasselblad H3Dii-50

Details as follows-

http://www.dxomark.com/index.php ... or/Compare-sensors/(appareil1)/668%7C0/(appareil2)/579%7C0/(appareil3)/585%7C0/(onglet)/0/(brand)/Pentax/(brand2)/Phase%20One/(brand3)/Hasselblad

Pentax 645D vs Phase One P45+ vs Hasselblad H3Dii-39

Details as follows-

http://www.dxomark.com/index.php ... or/Compare-sensors/(appareil1)/668%7C0/(appareil2)/456%7C0/(appareil3)/457%7C0/(onglet)/0/(brand)/Pentax/(brand2)/Phase%20One/(brand3)/Hasselblad


+ Please note the above results only show the "Overview" comparison.

   For more details dig into the "ISO Sensitivity", "SNR 18%", "Dynamic Range", "Tonal Range" and "Color Sensitivity"
   tabs.

+ As usual,please note DxOmark evaluates RAW sensor data,which is only one of the many factors that can influence
   the image quality of a captured image .

SSSL

Camera Sensor rankings with DxOMark

http://www.dxomark.com/index.php/Camera-Sensor/Sensor-rankings

SSSL

http://www.pentaxforums.com/foru ... -thoughts-645d.html

這是我最後的想法在Pentax 645D 和彙編作品在過去的六個月。

總之，Pentax 645D 是一個偉大的價值，那些誰認為打印的質量最高的優先級。


圖像質量

（1） 每個像素點的質量最有可能超過任何高端 單反相機，不知道如何比較其他媒體格式位數七段。
（2） 圖像銳化非常好，比D3X的，件1DS III或5D條二，RAW文件包含細小的細節，少磨工件時，用同樣的參數在ACR的（相比於 100％）。
（3） 實現泛焦更加殘酷的風景攝影師由於傳感器尺寸較大。對於像素的同輩人，如果你要求高品質的每個像素，這意味著很 小的圈子混亂， 自由度 將永遠是一個問題，當您包括特寫遠處的物體（如少於 10 - 15英尺，當您拍攝在35毫米，f/13），重點是你堆放可能要考慮的問題。
（4） 動態範圍似乎沒有什麼不同，比任何其他數碼單反相機，規格從製造商似乎支持我的經驗。
（5） 產生更好的圖像使用ISO 100比ISO 200（ISO 200時，即使是默認的），雖然我沒有測試以上ISO 400。
（6） 色彩還原是很自然的。紅色通道往往被壓制相比，佳能數碼單反相機（也許這是其他方式，佳能往往oversaturate）。
（7） 可怕的白色平衡。特別是拍攝日落和日出給你一個數字的物流挑戰，汽車 世行 幾乎從來沒有的權利。需要採取心理圖像的場景和正確的 世行 在RAW轉換器\u200b\u200b的記憶。
（8） 在f/16衍射變得明顯，最好的光圈似乎是f/11-f/13為風光攝影。

相機

（1） 絕對大於任何頂級數碼單反相機的路線，但其規模輕。
（2） 符合人體工程學設計，處理得非常好。
（3） 感覺很紮實很好的問題，灰塵 /天氣密封提供了極大的保障。
（4） 取景器大而亮，顯示所有必要的信息。
（5） 鏡子是很好挫傷，鎖定是非常有益的景觀射手。
（6） 電子水平儀，方便，準確，還提供取景器內。
（7） 非常有用的專用控制按鈕 /旋鈕為 bracketting，鏡鎖定，計量， 自動對焦 模式， 自動對焦，白平衡和驅動模式。
（8） 電池壽命是綽綽有餘的，購買了3額外的電池，從來沒有使用兩個以上的電池，在一天。
（9） 單獨的安裝板可以貼在左邊為垂直的攝像機鏡頭，非常有用的，因為有些球頭的重量不能支持的相機時，傾斜。
（10） 3“液晶顯示器是一個最好的特點，精湛的質量。相機提供了快速放大檢查對焦 /清晰度（通常是放大到14倍，16倍給你一個良好的意義上是100％原裝）。
（11） 似乎是準確的自動對焦，也沒有機會進行精確測試。
（12） 缺乏實時查看是一個重大的缺點相比，高端數碼單反相機。
（13） 大約需要4秒，檢討了一槍甚至32GB的SDHC卡的SanDisk Extreme（30MB / s的），（帶鏡頭更正關閉），可以不時令人沮喪。

鏡頭

（1） 大多數足協鏡頭似乎執行得很好例外的FA 33 - 55mm的和FA 45毫米。測試鏡頭：足總杯 35毫米，足總杯 33 - 55mm的，足總杯 45 - 85毫米，足總杯 55 - 110毫米，足總杯 80 - 160毫米，45毫米足總杯，ð發 55毫米，75毫米足總，足總 150毫米。
（2） 英足總的35mm稍微優於 35毫米，雖然質量非常邊緣與 645全畫幅傳感器，仍有待觀察。
（3） 似乎提供了一個更大的35毫米 自由度 比足協三五毫米集中在同距離具有相同的f值，可能是由於以下場曲。一個測試，不久將進行。
（4） 足總杯 33五十五毫米幾乎 unusuable用於像素的同輩人，由於極端場曲，它從來夏普公司從角落到角落低於 f/16，所以幾乎總是大大衍射極限。鏡頭從 35mm到性能更好45毫米。兩份測試，同時校準賓得日本。
（5） 足總杯 45八十五毫米和FA 80一百六十零毫米足總杯表現略好於 55一一○毫米，所有三個鏡頭產生非常清晰的圖像。
（6） ð發 55毫米，似乎在一點點柔和的邊緣比足協 45 - 85毫米，但在中心稍微清晰的框架，鏡片都表現非常好。
（7） ð發 25毫米，是在它的方式，將報告早在幾個星期。

打印

（1） 經測試高達 30“X40的”，提供了巨大的品質和驚人的細節。
（2） 預計將提供打印高達 39“× 52”這是雪亮的仔細檢查後（假設 1.5英尺觀看距離）時，正確處理和激化。

改進建議

（1） 80MP全畫幅傳感器。
（2） 發展傾斜鏡頭（控制焦平面，避免衍射）。
（3） 實時查看。
（4） 改進白平衡。
（5） 更快的影像檢查。
（6） 鉸接式液晶顯示器。

一個雞蛋裡挑骨頭

該工廠遙控器F有一個小小的按鈕。這是棘手的使用，因為你必須按它與你的指甲，且有時你最終錯過了一槍。售後遠程功能按鈕更大，更便宜，效果更好。

SSSL

http://www.pentaxforums.com/foru ... -does-yosemite.html