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rbelyell
Joined: 13 Oct 2009 Posts: 4269 Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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Posted: Tue Jan 19, 2010 10:44 pm Post subject: m4/3 focus confirm question |
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rbelyell wrote:
hi
i am seriously considering olypmus m4/3 to use w mf lenses through various adapters. while the adapters i use now, m42/contax/t mount etc, all were advertised as giving 'focus confirmation' on my 5d, i dont see any adapters for m4/3 advertised that way. does anyone know if these same type adapters will allow the focus confirmation of the olly m4/3 cameras to work?
thanks _________________ Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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Rolf
Joined: 02 May 2009 Posts: 4123 Location: NRW/Germany
Expire: 2015-12-26
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Posted: Tue Jan 19, 2010 10:52 pm Post subject: |
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Rolf wrote:
Didn´t found this type of adapters. All adapters to m4/3 are without any confirm chip.
_________________ Rolf |
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rbelyell
Joined: 13 Oct 2009 Posts: 4269 Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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Posted: Tue Jan 19, 2010 10:57 pm Post subject: |
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rbelyell wrote:
thanks rolf. as i understand it, when you manual focus using the lcd screen w these cameras the screen magnifies like 10x. i assume that function still works? but when you achieve proper focus, the green light does not come on, correct? _________________ Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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Rolf
Joined: 02 May 2009 Posts: 4123 Location: NRW/Germany
Expire: 2015-12-26
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Posted: Tue Jan 19, 2010 11:04 pm Post subject: |
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Rolf wrote:
that´s right. I don´t know how it is with the Oly.
For example if you use a Pentax it is not neccessary to use a confirm chip because the cam find the focus alone. But Pentax is not m4/3. May be that the Oly has the same option - I don´t know.
Pansonic don´t have this feature. You have to use the magnifier (5x,10x) to find the proper focus.
_________________ Rolf |
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bogolisk
Joined: 20 Dec 2009 Posts: 448
Expire: 2011-11-18
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Posted: Tue Jan 19, 2010 11:10 pm Post subject: |
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bogolisk wrote:
Rolf wrote: |
that´s right. I don´t know how it is with the Oly.
For example if you use a Pentax it is not neccessary to use a confirm chip because the cam find the focus alone. But Pentax is not m4/3. May be that the Oly has the same option - I don´t know.
Pansonic don´t have this feature. You have to use the magnifier (5x,10x) to find the proper focus.
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same on the pen (7x, 10x) and you decide if the focus is correct or not. |
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rbelyell
Joined: 13 Oct 2009 Posts: 4269 Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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Posted: Tue Jan 19, 2010 11:33 pm Post subject: |
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rbelyell wrote:
ok, thank you both _________________ Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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n6mod
Joined: 20 Oct 2008 Posts: 134 Location: Boulder Creek, CA, USA
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Posted: Thu Feb 04, 2010 4:46 pm Post subject: AF Confirm can't work on mirrorless cameras. |
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n6mod wrote:
There is no way for AF confirm to work on a m4/3 (or Samsung NX) camera, as there is no mirror.
AF confirm is a feature of phase detect (also called "Secondary Image Registration") systems, and require a beam splitter to send some portion of the image through what is basically a tiny rangefinder. You get the AF-confirm indication when when this system detects that you're in focus. Phase-detect AF can actually tell exactly how out-of-focus you are, and thus can snap directly into focus.
Contrast-detect AF, like in the m4/3 cameras, compacts, and video cameras, requires a closed-loop system with the lens, and will always 'hunt' around focus, though good systems hunt only slightly. Just like the eye/photographer system we use for manual focus, you tweak around 'in-focus' looking for the best spot. Again, good photographers hunt only slightly.
Thus, you'll never see AF-confirm adapters for m4/3, as there's no point. |
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rbelyell
Joined: 13 Oct 2009 Posts: 4269 Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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Posted: Thu Feb 04, 2010 6:33 pm Post subject: |
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rbelyell wrote:
thank you n6mod for your thorough explanation. _________________ Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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gaman
Joined: 08 Oct 2008 Posts: 25 Location: Marsala, Italy
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Posted: Fri Feb 05, 2010 10:52 am Post subject: Re: AF Confirm can't work on mirrorless cameras. |
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gaman wrote:
n6mod wrote: |
There is no way for AF confirm to work on a m4/3 (or Samsung NX) camera, as there is no mirror.
AF confirm is a feature of phase detect (also called "Secondary Image Registration") systems, and require a beam splitter to send some portion of the image through what is basically a tiny rangefinder. You get the AF-confirm indication when when this system detects that you're in focus. Phase-detect AF can actually tell exactly how out-of-focus you are, and thus can snap directly into focus.... |
On Panasonic m4/3 cameras there is a green light (top right of the evf), that come on when the correct focus is achieved.
However, this focus confirm feature works only with dedicated lenses, either in Af or MF mode, but not with the adapted ones. _________________ Gaetano |
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rbelyell
Joined: 13 Oct 2009 Posts: 4269 Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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Posted: Fri Feb 05, 2010 1:56 pm Post subject: |
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rbelyell wrote:
yes, i believe that would dedicated lenses would fall under the 'closed system' that was referred to above. _________________ Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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n6mod
Joined: 20 Oct 2008 Posts: 134 Location: Boulder Creek, CA, USA
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Posted: Sat Feb 06, 2010 7:39 pm Post subject: Re: AF Confirm can't work on mirrorless cameras. |
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n6mod wrote:
gaman wrote: |
However, this focus confirm feature works only with dedicated lenses, either in Af or MF mode, but not with the adapted ones. |
In MF mode? That's really interesting. I wonder if the camera is hunting around slightly as you turn the focus ring. (Haven't played with one in MF mode)
-Z |
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Attila
Joined: 24 Feb 2007 Posts: 57865 Location: Hungary
Expire: 2025-11-18
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Posted: Sun Feb 07, 2010 6:11 pm Post subject: Re: m4/3 focus confirm question |
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Attila wrote:
rbelyell wrote: |
hi
i am seriously considering olypmus m4/3 to use w mf lenses through various adapters. while the adapters i use now, m42/contax/t mount etc, all were advertised as giving 'focus confirmation' on my 5d, i dont see any adapters for m4/3 advertised that way. does anyone know if these same type adapters will allow the focus confirmation of the olly m4/3 cameras to work?
thanks |
Simple don't need any, 10x magnification more than enough I never miss any focusing aid what is need on SLR cameras. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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rbelyell
Joined: 13 Oct 2009 Posts: 4269 Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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Posted: Sun Feb 07, 2010 7:05 pm Post subject: |
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rbelyell wrote:
thank you attila, i am sure you are correct. i will be getting the ep1 next week! _________________ Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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gorg
Joined: 10 Feb 2015 Posts: 1 Location: Czech Republic
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Posted: Tue Feb 10, 2015 10:07 am Post subject: M42 on micro 4/3 AF confirm |
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gorg wrote:
Hello, I know that due to the contrast detection based focusing system of micro 4/3 cameras, there is no adapter for AF confirm. But what about combining some adapter AF confirm 4/3 to micro 4/3 adapter with an AF confirm adapter m42 to 4/3 (I found some on ebay)? Could this work, does anybody have an experience with this kind of solution? Thank you. _________________ Marek |
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SXR_Mark
Joined: 12 Jun 2010 Posts: 506 Location: England
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Posted: Sun Feb 22, 2015 9:53 pm Post subject: Re: M42 on micro 4/3 AF confirm |
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SXR_Mark wrote:
gorg wrote: |
Hello, I know that due to the contrast detection based focusing system of micro 4/3 cameras, there is no adapter for AF confirm. But what about combining some adapter AF confirm 4/3 to micro 4/3 adapter with an AF confirm adapter m42 to 4/3 (I found some on ebay)? Could this work, does anybody have an experience with this kind of solution? Thank you. |
I have tried this and it doesn't work. I tried using an OM to 4/3 adapter with Tago Tech AF confirm chip attached to the MMF-1 4/3 to m4/3 adapter with electronic contacts on my OMD EM5. The result was the camera kept locking up.
Actually, Tago Tech do (or did) make a dedicated m4/3 AF confirm chip. It is still listed on their store but is showing out of stock.
Click link for Tago Tech Store _________________ Olympus OM-D E-M1 for everything |
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gcrimmins
Joined: 31 Mar 2008 Posts: 146 Location: Moscow, Idaho, USA
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Posted: Sun Apr 05, 2015 3:06 pm Post subject: |
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gcrimmins wrote:
Some of the newer M4/3 cameras also have focus peaking which can be used by itself or in combination with magnification for manual focusing.
--Geoff |
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