sigma 18-35 GH4 distortion problem?

joe swanson said:

Randy Veeman said:

joe swanson said:

Hithertoo said:

Until metabones releases a fix you may just have to use a RAW editor that doesn't apply correction out of the camera such as DXO Optics or etc... It's a pain but this might be the only way to salvage files.

I don't think you can turn off the in camera distortion correction.

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that's ridiculous though. you can't expect someone to work as a videographer, having to deal with this problem. imagine shooting every shot distorted, hoping it will look ok undistorted? and why is this only happening to me? thousands of people have this combo (GH4 + metabones + sigma 18-35) and everyone's footage looks fine. is there a way to contact brian caldwell directly? didn't he used to post on here?

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http://www.dpreview.com/members/5764986886/overview

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thanks for that, sent him a message. hope he answers.

i also emailed metabones again and this time they answered with 'sorry that the speed booster can't correct the distortion problems while using the 18-35'

is this a joke? sorry if i'm having a breakdown, i just find it so frustrating that no one, including the company itself, can give me a straight answer as to why this is happening...

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Richard Butler said:

joe swanson said:

Randy Veeman said:

joe swanson said:

Hithertoo said:

Until metabones releases a fix you may just have to use a RAW editor that doesn't apply correction out of the camera such as DXO Optics or etc... It's a pain but this might be the only way to salvage files.

I don't think you can turn off the in camera distortion correction.

Click to expand...

that's ridiculous though. you can't expect someone to work as a videographer, having to deal with this problem. imagine shooting every shot distorted, hoping it will look ok undistorted? and why is this only happening to me? thousands of people have this combo (GH4 + metabones + sigma 18-35) and everyone's footage looks fine. is there a way to contact brian caldwell directly? didn't he used to post on here?

Click to expand...

http://www.dpreview.com/members/5764986886/overview

Click to expand...

thanks for that, sent him a message. hope he answers.

i also emailed metabones again and this time they answered with 'sorry that the speed booster can't correct the distortion problems while using the 18-35'

is this a joke? sorry if i'm having a breakdown, i just find it so frustrating that no one, including the company itself, can give me a straight answer as to why this is happening...

Click to expand...

Several people have suggested that the problem isn't one of distortion, as such, but of the camera misidentifying the lens.

It seems very likely (and the reason I requested images with the full EXIF), that the adapter is reporting the lens ID of a lens that needs correction as part of its design. The camera is automatically applying those corrections, the problem is it's applying them to a lens that doesn't need correcting.

If this is the case, it's worth contacting Metabones and asking if there's any mechanism for changing the lens ID reported by the adapter, asthere is for non_Canon lenses.

Richard - dpreview.com

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joe swanson said:

ah i think i get it now.. so i should try that lens registration thing. i'm just worried though, they say to turn the camera on without the lens and then attach it while the camera is still on. isn't that not recommended? kinda worried i'll break something and then be screwed.

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joe swanson said:

tried doing the maximum aperture thing following metabones website procedure and still nothing... i'm dying here.

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Richard Butler said:

joe swanson said:

tried doing the maximum aperture thing following metabones website procedure and still nothing... i'm dying here.

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The link I provided was explicitly for non-Canon lenses.

My suggestion wasn't to try it, it was to contact Metabones and ask whether there is any way of achieving something similar with Canon lenses.

Richard - dpreview.com

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cyberstudio said:

Could you try and see if this procedure helps, whenever the pincushion issue occurs?

1, your Metabones Speed Booster has a jog lever. Push it inwards, and hold it.

2, while still holding the jog lever down, press the lens release button once (without detaching the lens) and then release the lens release button.

You should be able to turn off the in-camera distortion this way, and all the distortion you now see is that of the lens itself. Let me know if this works.

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joe swanson said:

cyberstudio said:

Could you try and see if this procedure helps, whenever the pincushion issue occurs?

1, your Metabones Speed Booster has a jog lever. Push it inwards, and hold it.

2, while still holding the jog lever down, press the lens release button once (without detaching the lens) and then release the lens release button.

You should be able to turn off the in-camera distortion this way, and all the distortion you now see is that of the lens itself. Let me know if this works.

--
Bo-Ming / conurus

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i can't believe my eyes, it worked! thank you so much bo-ming, you have no idea what a relief this is! can you please shed some light on the situation and explain to us why this solved the problem? and why was there pincushion in the first place, seeing as most people don't experience this?

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joe swanson said:

cyberstudio said:

Could you try and see if this procedure helps, whenever the pincushion issue occurs?

1, your Metabones Speed Booster has a jog lever. Push it inwards, and hold it.

2, while still holding the jog lever down, press the lens release button once (without detaching the lens) and then release the lens release button.

You should be able to turn off the in-camera distortion this way, and all the distortion you now see is that of the lens itself. Let me know if this works.

Click to expand...

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