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Old Jul 26, 2012, 10:56 AM   #1
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Default Olympus 35mm Macro Hunts

My 35mm macro will occassionally hunt for unacceptable time periods. This generally happens when photographing subjects very close to the lens. When it finally focuses, the results are good. Should have used a tripod here but the photos use didn't warrant a very sharp image. Does anyone else see this with their macro?


P7240395 by James Gasta, on Flickr
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Old Jul 26, 2012, 11:10 AM   #2
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I see this with the 70-300mm when doing close focus work. Sometimes it will be good, good, good and then all of a sudden it can't seem to find the spot it was just on and it will focus out, then in and then just kinda give up. At that point I usually do a power cycle and all is well again.
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Old Jul 26, 2012, 11:57 AM   #3
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Quote:
Originally Posted by ramcewan View Post
I see this with the 70-300mm when doing close focus work. Sometimes it will be good, good, good and then all of a sudden it can't seem to find the spot it was just on and it will focus out, then in and then just kinda give up. At that point I usually do a power cycle and all is well again.
Yes, that's another quirk about it. Sometimes it won't find the spot and then I just switch to manual focus.
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Old Jul 26, 2012, 2:21 PM   #4
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Hi Guys,

You will find that most of the lenses made for the full size four thirds cameras will hunt incessantly, at times, when used on a Micro Four Thirds camera body.
Reason being, the full four thirds camera bodies employed a phase difference detection auto focus system as opposed to the Pen series which employ the contrast detect auto focus system. The AF problems really are most noticeable IMHO, when trying to focus on something that doesn't have a great deal of contrast or delineation of features.

Now, that doesn't mean that they cannot be employed on the Pen bodies, it just means that manually focusing may be, at times, less frustrating.

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Old Jul 26, 2012, 2:32 PM   #5
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Greg or anyone with a M5 that has this lens may chime in as to whether there is a noticeably faster focus time with this lens.
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Old Jul 26, 2012, 3:30 PM   #6
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good lighting really help the lens not to hunt. The macro light for the pens work great in aiding the lens focus.

http://www.adorama.com/IOMMAL1.html
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Old Jul 26, 2012, 3:42 PM   #7
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Yes, was seriously considering buying one of these. Very reasonable price.
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Old Jul 26, 2012, 3:47 PM   #8
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If you are shooting 1:1 just manual focus. Even on my dslr, when I am shooting 1:1 AF gets me close, then I fine tune the focus manually.
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Old Jul 26, 2012, 3:53 PM   #9
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Quote:
Originally Posted by shoturtle View Post
If you are shooting 1:1 just manual focus. Even on my dslr, when I am shooting 1:1 AF gets me close, then I fine tune the focus manually.
Shoturtle, what do you mean 1:1. The 35mm macro is a 1:1 lens, you cannot change that aspect.
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Old Jul 26, 2012, 4:04 PM   #10
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well it is capable of 1:1 when you get up close at the min focus range. But if you are bit further back it is 1:2, 1:3. When you shoot that close where you are 1:1, I do not know anyone that really AF to get the critical. Everyone I know uses MF.
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