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Backscatter sharp wide lens (uwl-03) doesn't cover the full gopro sensor


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I just received my backscatter Sharp wide lens (aoi uwl-03) and noticed that the image corners are completely black when using it.  It's not some slight vignetting but the camera seeing the inside of the lens.
 

It seems the backscatter bayonet mount does not get the lens close enough to the port glass to cover the entire sensor. The backscatter bayonet system has some extra space built in it for allowing filters inbetween the port an lens.  

 

The AOI bayonet system doesn't have the filter option. Does anyone here know if that one places the lens in a better position ?

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6 minutes ago, Davide DB said:

Hummmm...

I've used it several times. Just read the other thread here.

Are you checking it in water? On land there's a strong vignette which disappears underwater.

I remember you using it without the underwater case from the other thread, is that correct? In that case the wet lens might be a lot closer.

 

Here is a quick underwater picture of my sink. There is some vignette but it seems I am looking at the inside of the lens here.

GOPR0146.JPG

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Hi Robin,

 

Yes I used it with a 52mm screw mount but I tested the default bayonet mount without problems.

The bayonet mount needs water inside to remove the vignette.

 

 

 

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17 minutes ago, Davide DB said:

 

I used to submerge the gopro on and videos would start with vignetting that would disappear as if by magic as the water entered the wet mount.

 

 

I Attached the lens underwater so I am sure there is water inside the mount. I also don't see how the mount itself could be installed incorrectly. 

I do get a full projection if I remove the bayonet holder and manually hold the lens in front of the case. So I am wondering now if the AOI bayonet holder gets the lens closer to the case. 

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Are you setting the gopro lens linear or wide (not superwide)?

 

Sorry I can't help you right now. The lens was lent to me by the official dealer and I returned it. Other people who tried it before me also had no problems.

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2 hours ago, Davide DB said:

Are you setting the gopro lens linear or wide (not superwide)?


@Robin.snapshots This is my question as well.  I use this wet lens with my GoPro in a GoPro housing with the Wide lens setting.  I do not have the vignette.  

Edited by ChipBPhoto
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19 minutes ago, ChipBPhoto said:


@Robin.snapshots This is my question as well.  I use this wet lens with my GoPro in a GoPro housing with the Wide lens setting.  I do not have the vignette.  

I have the gopro set to RAW shooting so there is only the wide option available.  For video the vignetting is less apparent  but still present in the wide setting.  The circle "moves around" so to speak due to the image stabilisation. 

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1 hour ago, Robin.snapshots said:

I have the gopro set to RAW shooting so there is only the wide option available.  For video the vignetting is less apparent  but still present in the wide setting.  The circle "moves around" so to speak due to the image stabilisation. 

 

Try to change the stabilization and see if something change. I've never used warp or whatever it's called

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On 4/2/2024 at 7:02 PM, Davide DB said:

 

Try to change the stabilization and see if something change. I've never used warp or whatever it's called

Just tried disabling the stabilisation. It does exactly as expected. The black corners are still there only now with the image circle nicely centered.

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11 hours ago, Robin.snapshots said:

Just tried disabling the stabilisation. It does exactly as expected. The black corners are still there only now with the image circle nicely centered.

 

Really I don't know what's going on.

Last resort, as @ChipBPhoto wrote: contact Backscatter... and let us know.

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