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jesperhs
Joined: 28 Sep 2011
Posts: 2
Location: Denmark
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 Posted: Wed Sep 28, 2011 12:12 pm Post subject: Helios lens autofocus problem |
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jesperhs wrote:
Hi
I have recently bought a Helios 44M lens (2/5 with autofocus and put it on my Canon 550D dslr camera. It seems the autofocus does not work?
Is it supposed not to work? Or could it be that it is simply broken? Will it work on other dslr cameras? (I am planning on buying a Canon 7D very soon...)
Hope you can help!
- Jesper |
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Spotmatic
Joined: 18 Aug 2008
Posts: 4045
Location: Netherlands
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| Posted: Wed Sep 28, 2011 12:15 pm Post subject: |
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Spotmatic wrote:
Are you kidding? A Helios 58/2 does not have autofocus. However, you can get focus confirmation when you use a chipped adapter (an adapter with contacts). You'd still need to focus the lens by hand though... That's what this forum is about. 
Edit: welcome to the forum!
_________________
Peter - Moderator
Pentax K-5 + Pentax 645 + Canon 5D + Bessa RF 10,5cm Heliar, and a 'little' bag full of MF lenses. The lens list is * here *.
My fast 80s: Asahi-Kogaku Takumar 83mm f/1.9 - Super-Takumar 85mm f/1.9 - FA 77mm f/1.8 Limited - Cyclop 85/1.5 (Helios-40 innards) - Komura 80mm f/1.8 - Meyer Görlitz Primoplan 7,5cm 1:1.9 - Carl Zeiss Jena 80mm f/1.8 Pancolar - Canon 85mm f/1.8 S.S.C. - Canon 85mm f/1.2 S.S.C. Aspherical |
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jesperhs
Joined: 28 Sep 2011
Posts: 2
Location: Denmark
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| Posted: Wed Sep 28, 2011 12:21 pm Post subject: |
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jesperhs wrote:
That was fast!
As you might have guessed, I am very new to this. And to be honest I do not really know much about any of this - which is why I am asking.
Alright, can you explain to me then what the M/A switch on the side of the lens is used for then?
What does focus confirmation actually mean? |
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GrahamNR17
Joined: 17 Jan 2009
Posts: 1855
Location: Norfolk, UK
Expire: 2012-09-06
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| Posted: Wed Sep 28, 2011 12:40 pm Post subject: |
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GrahamNR17 wrote:
The A/M is for switching between auto or manual aperture operation at the moment of exposure on old cameras, such as Pentax, Praktica etc. You will need it in the M position on modern cams.
AF Confirm means the camera will beep, or indicate in some way, that you have achieved perfet focus. someone will be along shortly to offer more specific info for your camera.
...and welcome! |
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xjjohnno
Joined: 07 Apr 2009
Posts: 1270
Location: Melbourne Australia
Expire: 2011-11-18
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| Posted: Wed Sep 28, 2011 12:45 pm Post subject: |
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xjjohnno wrote:
The M/A switch relates to old technology for changing the aperture of the lens. The little pin would be depressed when in A mode to actuate the aperture. This function no longer exists so to choose your desired aperture you need M mode selected and then you get a darker viewfider with a higher aperture value.
Play with the lens and you will see what I mean. |
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DSG
Joined: 04 Mar 2007
Posts: 544
Location: London, UK.
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| Posted: Thu Oct 27, 2011 1:20 pm Post subject: |
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DSG wrote:
Tip: Always focus your lens at its widest, fastest aperture and only stop down if you have a very good reason to.
A good reason would be because your using a lens with poor quality optics, making it soft and virtually unusabe at its widest aperture.
Most good lenses peak in sharpness at between f4-f5.6, so always shoot at a wider aperture than f5.6 whenever possible and dont be tempted to stop down more than f8-11 or you will start running into diffraction problems (your lens will start getting softer again.) |
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