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Olympus OM-D E-M1 The first Micro Four Thirds camera that offers phase detect focusing so you can use Four Thirds DSLR lenses normally as well a Micro Four Thirds lenses.

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Old 10th March 2017
RobEW RobEW is offline
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PDAF not used in S-AF mode????

I just read, inter alia in this lens review http://www.imaging-resource.com/lens.../?product=1840 :

"Using the E-M1 with S-AF mode, which utilizes contrast-detect AF only"
and
"switching the E-M1 over to C-AF mode enables Dual Fast AF with a combination of CDAF and on-sensor phase detect".

Is this truly the case? I use "S-AF + MF" nearly all the time, and think I get better AF (on my old Four-thirds lenses) with the E-M1 compared to the E-M5 II, and I always attributed this improvement to the provision of PDAF on the E-M1.
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Old 10th March 2017
Walti Walti is offline
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Re: PDAF not used in S-AF mode????

Quote:
Originally Posted by RobEW View Post
I just read, inter alia in this lens review http://www.imaging-resource.com/lens.../?product=1840 :

"Using the E-M1 with S-AF mode, which utilizes contrast-detect AF only"
and
"switching the E-M1 over to C-AF mode enables Dual Fast AF with a combination of CDAF and on-sensor phase detect".

Is this truly the case? I use "S-AF + MF" nearly all the time, and think I get better AF (on my old Four-thirds lenses) with the E-M1 compared to the E-M5 II, and I always attributed this improvement to the provision of PDAF on the E-M1.
With the MKi PDAF is only enabled when using a M4/3 lens with C-AF, or at all times when using a 4/3 lens. So yes you should get better performance with the E-M1 than the E-M5 along with the 4/3 lens.

I think this changes with the MKii.
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Old 10th March 2017
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Ross the fiddler Ross the fiddler is offline
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Re: PDAF not used in S-AF mode????

Quote:
Originally Posted by RobEW View Post
I just read, inter alia in this lens review http://www.imaging-resource.com/lens.../?product=1840 :

"Using the E-M1 with S-AF mode, which utilizes contrast-detect AF only"
and
"switching the E-M1 over to C-AF mode enables Dual Fast AF with a combination of CDAF and on-sensor phase detect".

Is this truly the case? I use "S-AF + MF" nearly all the time, and think I get better AF (on my old Four-thirds lenses) with the E-M1 compared to the E-M5 II, and I always attributed this improvement to the provision of PDAF on the E-M1.
That's true, but if you can afford it, the E-M1 II will give you Dual Fast AF all the time with M4/3's lenses, plus it uses cross type PD-AF instead of just the horizontal sensors (for vertical detail) in the E-M1.

I was using the 50-200 SWD lens on the E-M1 & found it pretty good to get focus in many cases (I think anyhow), but its aperture blades started to stick late last year so I jumped in & bought the 40-150 Pro lens with the 1.4 TC. Now I have situations where I find it harder to lock focus & unfortunately am wishing for the E-M1 Mk II body to give me better focussing with it. Of course, the rest of the nice things about the Mk II would be appreciated too.

There are times that CD-AF is better than PD-AF but other circumstances where PD-AF performs better.
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Old 10th March 2017
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Re: PDAF not used in S-AF mode????

Thanks both for useful information. I wasn't imagining the AF improvements then. The quotes from the article were clearly not applicable to a situation the author was not considering - the use of FT lenses.

I *love* both my HG FTs; often go out with 12-60 on E-M5 II and 50-200 on E-M1. Both AF perfectly adequately for my current shooting style which is rather sedate. (Often architectural / landscape, so the time I spend on composition and waiting for the scene or light to be just right before clicking dwarfs any miniscule differences in AF time). If I was doing action photography I might be more interested in optimising AF further.

E-M1 II is way outside what I can justify spending. If I had that money for my hobby it would probably go on lenses.
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