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645D 的圖片與感想 [複製連結]

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發表於 2011-4-18 11:17:35 |顯示全部樓層 | 字體大小
看了這作品不得不分享,作者是Pentaxforums的harklee,原連接在這,建議大家去看一下。

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

為了使PFC版友方便閱讀,我把作者的感想與圖片帖在這裡。


My final thoughts on the 645d...

These  are my final thoughts on the 645d and a compilation of works for the  past six months. In summary, the 645d is a great value to those who  consider the quality of prints the highest priority.

A. Image Quality

(1) Quality of each pixel most likely exceeds that of any high end DSLR, no idea how it compares to the other digital medium formats.
(2)  Images sharpen very well, compared to d3x, 1ds III or 5d ii, the RAW  files contain finer details and less artifacts when sharpened with the  same parameters in ACR (compared at 100%).
(3) Pan focus is  much tougher for landscape photographers due to larger sensor size. For  pixel peepers, if you demand high quality for each pixel, meaning very  small circle of confusion, the DOF  will always be a problem when you include close-distance objects (e.g.  less than 10ft when you are shooting at 35mm, f/13), focus stacking is  something you may want to consider.
(4) The dynamic range  seems to be no different than any other DSLRs, the specifications from  the manufacturer seem to support my experiences.
(5) ISO 100 produces better images than ISO 200 (even though ISO 200 is default), although I never tested above ISO 400.
(6)  Color rendition is very natural. Red channel tends to be suppressed  compared to the canon DSLRs (maybe it's the other way around, Canon  tends to oversaturate).
(7) TERRIBLE white balance. Especially photographing sunsets and sunrises gives you a number of logistic challenges, the auto WB is almost never right. Need to take mental images of the scene and correct them in RAW converter based on memory.
(8) Diffraction becomes noticeable at f/16, the best aperture seems to be f/11-f/13 for landscape photography.

B. The Camera

(1) Definitely bigger than any top of the line DSLRs, but light for its size.
(2) Ergonomically designed, handles very well.
(3) Feels very solid and well made, the dust / weather seal offers great protection.
(4) Viewfinder is large and bright, displays all essential information.
(5) Mirror is well dampened, lock-up is very useful for landscape shooters.
(6) Electronic level is convenient and accurate, also offered inside the viewfinder.
(7) Very useful dedicated control buttons / knobs for bracketting, mirror lock-up, metering, AF mode, AF, white balance and drive mode.
(8) Battery life is more than enough, purchased three extra batteries, never had to use more than two batteries in one day.
(9)  Separate mounting plate can be attached on the left side of the camera  for vertical shots, very useful since some ball heads cannot support the  weight of the camera when tilted.
(10) 3" LCD is one of the  best features, superb quality. The camera offers fast zoom to check the  focus / sharpness (usually zoom to 14X-16X gives you a good sense of the  100% original).
(11) Auto focus seems accurate, didn't have a chance to carry out precision tests.
(12) Lack of liveview is a major disadvantage compared to high-end DSLRs.
(13)  It takes about 4 secs to review a shot even with Sandisk Extreme 32GB  SDHC cards (30MB/S), (with lens correction off), which can be  frustrating from time to time.

C. Lenses

(1)  Most FA lenses seem to perform very well with the exceptions of FA  33-55mm and FA 45mm. Tested lenses : FA 35mm, FA 33-55mm, FA 45-85mm, FA  55-110mm, FA 80-160mm, FA 45mm, D-FA 55mm, FA 75mm, FA 150mm.
(2) A 35mm marginally outperforms FA 35mm, although the quality of the very edges with a 645 full-frame sensor remains to be seen.
(3) A 35mm seems to offer larger DOF  than FA 35mm focused at the same distance with the same f-number,  probably due to smaller lens diameter. A test will be carried out  shortly.
(4) FA 33-55mm is almost unusuable for pixel  peepers, due to spherical focal plane, it's never sharp from corner to  corner below f/16, so almost always substantially diffraction-limited.  The lens performs better from 35mm to 45mm. Two copies tested, both  calibrated by Pentax Japan.
(5) FA 45-85mm and FA 80-160mm perform slightly better than FA 55-110mm, all three lenses produce very sharp images.
(6)  D-FA 55mm seems a tad softer at the edges than the FA 45-85mm, but  slightly sharper in the center of the frame, both lenses perform very  well.
(7) D-FA 25mm is on its way, will report back in a few weeks.

D. Prints
(1) Tested up to 30"X40", offers great quality and amazing details.
(2)  Expected to offer prints up to 39" X 52" that are sharp upon close  inspection (assuming 1 foot of viewing distance) when properly processed  and sharpened.

E. Suggested Improvements
(1) 80MP full-frame sensor.
(2) Development of tilt-shift lenses.
(3) Liveview.
(4) Improved white balance.
(5) Faster image review.
(6) Articulated LCD.

F. A Nitpick
The factory remote control F has a tiny button. It's tricky to use  because you have to press it with your fingernail and sometime you end  up missing the shot. Aftermarket remote features a larger button,  cheaper and works better.

G. Samples

645D 的圖片與感想
Ano Nuevo State Park, San Mateo, California (A 35mm)

645D 的圖片與感想
Golden Gate Bridge, San Francisco, California (FA 35mm)

645D 的圖片與感想
Davenport Beach, Davenport, California (FA 35mm)

645D 的圖片與感想
Cataract Falls, Fairfax, California (FA 35mm)

645D 的圖片與感想
Bonsai Rock, Lake Tahoe, Nevada (A 35mm)

645D 的圖片與感想
Emerald Bay, Lake Tahoe, California (A 35mm, panoramic)

645D 的圖片與感想
Hole in the Wall Beach, Davenport, California (A 35mm)

645D 的圖片與感想
Antelope Canyon, Page, Arizona (FA 45-85mm)

645D 的圖片與感想
Montana de Oro State Park, Los Osos, California (A 35mm)

645D 的圖片與感想
Mossbrae Falls, Dunsmuir, California (FA 35mm)

645D 的圖片與感想
Bonny Doon Beach, Davenport, California (FA 35mm)

645D 的圖片與感想
Convict Lake, Mono, California (A 35mm)

645D 的圖片與感想
Pigeon Point Lighthouse, Pescadero, California (FA 45-85mm)

645D 的圖片與感想
Subway, Zion National Park, Utah (FA 35mm)

645D 的圖片與感想
Wilder Ranch State Park, Santa Cruz, California (FA 45-85mm)

645D 的圖片與感想
Mount Shasta, Siskiyou, California (FA 35mm)

645D 的圖片與感想
Swinging Bridge, Yosemite National Park, California (FA 35mm)

645D 的圖片與感想
Pfeiffer Beach, Big Sur, California (FA 80-160mm)

645D 的圖片與感想
Cataract Falls, Fairfax, California (FA 35mm)

645D 的圖片與感想
Bonsai Rock, Lake Tahoe, Nevada (FA 35mm)

645D 的圖片與感想
Red Rock Canyon, Clark, Nevada (FA 45-85mm)

645D 的圖片與感想
Garrapata State Park, Carmel, California (FA 35mm)

645D 的圖片與感想
Subway, Zion National Park, Utah (FA 35mm)

645D 的圖片與感想
Bonny Doon Beach, Davenport, California (A 35mm)

645D 的圖片與感想
South Tufa, Mono Lake, Mono, California (FA 45-85mm, panoramic)

645D 的圖片與感想
Horseshoe Bend, Page, Arizona (A 35mm, panoramic)

645D 的圖片與感想
The Watchman, Zion National Park, Utah (FA 35mm)

645D 的圖片與感想
Valley View, Yosemite National Park, California (FA 35mm)

645D 的圖片與感想
Mesquite Sand Dunes, Death Valley National Park, California (FA 35mm)
1

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Memories are collection of every single passing moment and those moment will never repeat. Either we catch it or we lose it.

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發表於 2011-4-18 11:25:57 |顯示全部樓層 | 字體大小
每一張都可以拿來當wallpaper...
DSLR新手一名 PENTAX K-X DAL 18-55mm DAL 55-300mm [S]DA 40mm [/S] Tmaron A16 (常用) Sigma 24mm f/1.8 (新入手)

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發表於 2011-4-18 12:07:08 |顯示全部樓層 | 字體大小
真是細膩呀~!!!

好圖~!!!

PFC-Pentax Fans ClubPFC-Pentax Fans ClubPFC-Pentax Fans Club

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發表於 2011-4-18 12:20:59 |顯示全部樓層 | 字體大小
哇..!這是勸敗圖嗎??如果中統一發票第一特獎..我就拜一組回家..

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發表於 2011-4-18 13:06:34 |顯示全部樓層 | 字體大小
質感細緻,很富立體感!

徜徉在星空下

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發表於 2011-4-18 13:14:04 |顯示全部樓層 | 字體大小
感謝轉貼分享!
Post by 橘子駿;929296
哇..!這是勸敗圖嗎??如果中統一發票第一特獎..我就拜一組回家..
唉! 買不起..PFC-Pentax Fans Club

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發表於 2011-4-18 13:35:03 |顯示全部樓層 | 字體大小
這些圖害我看了嘴巴合不上

不虧是P家機王

等我中樂透就來買一組...
歡迎住新竹得朋友相約拍照

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發表於 2011-4-18 13:39:40 |顯示全部樓層 | 字體大小
真的是不該看的.....好想買,想把卡通通折掉

按按相機有益身心

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發表於 2011-4-18 13:55:26 |顯示全部樓層 | 字體大小
645D可以接A鏡或FA鏡?
我還以為只能接中篇幅的鏡頭..
雖然買不起,不過,這些圖還真是有夠美的拉PFC-Pentax Fans Club

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發表於 2011-4-18 14:08:54 |顯示全部樓層 | 字體大小
之前小弟也有發一篇645D的文在MO上,
小弟覺得看到645D的照片,很震憾..結果被一堆人酸,真慘!
看到這篇還是覺得很震憾,真細膩。
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