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Author Topic: Nikon comments on (its) poor mirrorless sales in North America  (Read 8898 times)

BJL

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Re: Nikon comments on (its) poor mirrorless sales in North America
« Reply #20 on: February 23, 2014, 06:27:33 pm »

Are all PDAF implementations equal?
Not at all, but since you say that
Quote from: BernardLanguillier
... the Nikon J1 and Nikon V2 ... are cameras that solve some photographic problems better than any other cameras today thanks to their super fast AF ...
a better question is whether you have any evidence for those cameras' AF superiority over recent PDAF-equipped mirrorless competitors from Olympus and Sony? For example, reviews of the Olympus E-M1 are quite favorable about its AF.
« Last Edit: February 23, 2014, 06:31:35 pm by BJL »
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BernardLanguillier

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Re: Nikon comments on (its) poor mirrorless sales in North America
« Reply #21 on: February 23, 2014, 07:04:58 pm »

Not at all, but since you say thata better question is whether you have any evidence for those cameras' AF superiority over recent PDAF-equipped mirrorless competitors from Olympus and Sony? For example, reviews of the Olympus E-M1 are quite favorable about its AF.

You did a partial quoting here. I meant that the combination of the fast AF and 60 fps did provide a unique value. ;)

Cheers,
Bernard
« Last Edit: February 23, 2014, 07:06:58 pm by BernardLanguillier »
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BJL

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Re: Nikon comments on (its) poor mirrorless sales in North America
« Reply #22 on: February 25, 2014, 11:22:03 am »

You did a partial quoting here. I meant that the combination of the fast AF and 60 fps did provide a unique value. ;)

Cheers,
Bernard

Indeed, but Johnny_Johnson had already addressed that other virtue!
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Vladimirovich

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Re: Nikon comments on (its) poor mirrorless sales in North America
« Reply #23 on: February 25, 2014, 03:46:42 pm »

Not at all, but since you say thata better question is whether you have any evidence for those cameras' AF superiority over recent PDAF-equipped mirrorless competitors from Olympus and Sony? For example, reviews of the Olympus E-M1 are quite favorable about its AF.
m43 do not use PDAF for focusing - only for tracking (E-M1), fast speed of m43 cameras is due to CDAF readouts = 120 measurements per second (first fast CDAF in panasonic GH2), 240 measurements per second (E-M5/GH3 generation sensors) and 480 measurments per second w/ the current generation of sensors ( Panasonic sensor in GH4/E-M1) + optics designed to be move fast by linear motors and respond to such rate of commands flow... I am not sure about the current generation of lenses but prev. generation like Panasonic 35-100/2.8 were capable to work with 240 commands (move forward/stop/move back) per second

PS: just from the recent interview of Panasonic engineers ( http://dc.watch.impress.co.jp/docs/news/interview/20140224_633945.html )

1) about the progress of CDAF speed in Panasonic bodies : 寺坂:フレームレートはボディの進化に応じて増えていまして、シリーズで申しますとDMC-GH1の時が60fpsDMC-GH2の時が120fpsDMC-GH3240fpsを実現しました ...

while most of other cameras (outside of m43) are still stuck @ 60fps

2) about the related progess with CDAF motors in lenses - the first lens capable to keep up with 240 commands from CDAF system in camera per second (that does not mean that there are 240 commands - that means that lock can be achieved w/ faster in S-AF mode or that when tracking moving object in C-AF you can execute much more focusing moves when necessary or use old-known-first-in-consumer camera depth from defocus CDAF technology in GH4 to achieve closer to PDAF performance using just CDAF) : 井上:いいえ、2012年発売のLUMIX GX VARIO 12-35mm F2.8 ASPH. POWER OIS以降のレンズはすべて240fps対応になっています。
« Last Edit: February 25, 2014, 08:28:04 pm by Vladimirovich »
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Vladimirovich

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Re: Nikon comments on (its) poor mirrorless sales in North America
« Reply #24 on: February 25, 2014, 03:53:30 pm »

Bernard mentions the AF advantage that Nikon One had when it was the first and only mirrorless system to offer PDAF, but Sony NEX, Olympus MFT and Canon EOS-M now also have PDAF.
m43 still can't match Nikon 1 in a good light, when Nikon 1 can engage PDAF
NEX, Fuji, etc can't match both m43 or N1 in any light (see fine print in releases of both NEX A6000 and Fuji X-T1 excluding both m43 and Nikon 1 from comparison)
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BJL

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Re: Nikon comments on (its) poor mirrorless sales in North America
« Reply #25 on: February 25, 2014, 10:46:25 pm »

AFAIK, the EM1 uses PDAF exclusively for stills AF when a four thirds SLR lens is in use, and a combination of PDAF and CDAF for stills AF when MFT lenses are attached. This suggests that the combination works better than PDAF alone when the lens has the linear stepper motors that support fast "jiggling" to search for focus.
Anyway, my point was simply that Nikon no longer has the monopoly on PDAF capabilities which at one stage gave it clearly the best CAF of any mirrorless system.
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