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Wide angle Lenses with focal lengths shorter than 14mm.

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Old 15th November 2014
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Iris staying shut?

I think that the iris is not opening on my ZD 8mm lens. Looking through the viewfinder it is very dark. Ive tried it on but my E520 and E-M1 (with adapter) and it's the same on both.

Does anyone know of any diagnosics software or is it a trip back to Olympus for it?
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Old 15th November 2014
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Re: Iris staying shut?

Had this with my 12-60. First to check if the aperture blades are stuck take the lens off and have a look through, you should be able to see if they're stuck closed.
Next put the lens back and set the camera to f22 on use the DOF preview key to see if it closes down any more. A few pushes of this might release it, if not it's off to Portugal for service.

Hope this helps.
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Old 16th November 2014
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Re: Iris staying shut?

Thanks Andy it sort of helped in that it has confirmed my initial suspicion.

F22 and activating the DOF preview opened the iris fully. It stays opened untill I stop it down then it doesn't seem to open again until I repeat the DOF trick.

Looks like it's a trip back to Oly for it.
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Old 16th November 2014
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Re: Iris staying shut?

At the risk of stating the obvious, have you cleaned the lens contacts?
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Old 16th November 2014
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Re: Iris staying shut?

Not that obvious as I hadn't tried that but having done so it hasn't helped.
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