Davide DB Posted March 10 Share Posted March 10 Naive question For the past two years I have used almost exclusively the anonymous Lumix 14-42 mm lens coupled with the Nauticam WWL-1. Lately I have had a chance to reuse the Lumix 12-35 mm and 6" Nauticam dome and I noticed that the stabilization of my GH5M2 is much less effective with the 14-42 mm + WWL combo. Could it be because the WWL alters the focal length of the lens a lot? For manual lenses, the GH5 allows you to set the focal length manually, which serves precisely the stabilization algorithm. 1 Link to comment Share on other sites More sharing options...
Guest Posted March 11 Share Posted March 11 You mean the 12-35mm lens is better? I would say it is down to the lens OIS being better in general not an effect of the WWL-1 Link to comment Share on other sites More sharing options...
Davide DB Posted March 11 Author Share Posted March 11 Yes, at the same focal length is significantly more stable. Then I made some test on land and there's no noticeable difference between them. My speculation is the focal length it's part of the OIS algorithm. I don't see other reasons because you have to set it manually on manual lenses. The 14-42 mm @14 has a FOV of 94° while behind the WWL become 130° so I am tricking the algorithm somehow. Link to comment Share on other sites More sharing options...
Guest Posted March 11 Share Posted March 11 2 hours ago, Davide DB said: Yes, at the same focal length is significantly more stable. Then I made some test on land and there's no noticeable difference between them. My speculation is the focal length it's part of the OIS algorithm. I don't see other reasons because you have to set it manually on manual lenses. The 14-42 mm @14 has a FOV of 94° while behind the WWL become 130° so I am tricking the algorithm somehow. 14mm has a field of view of 75 degree only and the WWL-1 is distorted it is not 130 degrees more like 95 equivalent There was some advice from nauticam to set this differently however because this is a zoom to what exactly you want to set it? Link to comment Share on other sites More sharing options...
Davide DB Posted March 11 Author Share Posted March 11 19 minutes ago, Interceptor121 said: 14mm has a field of view of 75 degree only and the WWL-1 is distorted it is not 130 degrees more like 95 equivalent There was some advice from nauticam to set this differently however because this is a zoom to what exactly you want to set it? Yes I was remembering incorrectly: its FOV is 74.8 - 28.6°. The explanation I gave myself is that the 12-35 behind the dome keeps more or less the same FOV while the WWL changes in FOV significantly confusing the algorithm. Zoom or not you have no way to change the data with a native lens. I should check it again but IIRC The settings are disabled. Link to comment Share on other sites More sharing options...
Guest Posted March 12 Share Posted March 12 On 3/11/2024 at 11:52 AM, Davide DB said: Yes I was remembering incorrectly: its FOV is 74.8 - 28.6°. The explanation I gave myself is that the 12-35 behind the dome keeps more or less the same FOV while the WWL changes in FOV significantly confusing the algorithm. Zoom or not you have no way to change the data with a native lens. I should check it again but IIRC The settings are disabled. Interesting I can override this on Sony the next question is to what though? Link to comment Share on other sites More sharing options...
Chris Ross Posted March 13 Share Posted March 13 Probably little you could do about it unless you could get the lens to report the focal length with the WWL. That's probably something around a 14mm rectilinear frame (full frame equivalent) on the horizontal axis. You could probably only tell by trying it and see how it handled. 1 Link to comment Share on other sites More sharing options...
Davide DB Posted March 13 Author Share Posted March 13 1 hour ago, Chris Ross said: Probably little you could do about it unless you could get the lens to report the focal length with the WWL. That's probably something around a 14mm rectilinear frame (full frame equivalent) on the horizontal axis. You could probably only tell by trying it and see how it handled. Yes, I know. I was asking to know if other people had noticed these differences in the water. On land there are not. Hence the explanation I gave myself. Maybe with a prime lens I could even fool the algorithm, but with a zoom there's no way. Thanks Link to comment Share on other sites More sharing options...
Guest Posted March 13 Share Posted March 13 1 hour ago, Davide DB said: Yes, I know. I was asking to know if other people had noticed these differences in the water. On land there are not. Hence the explanation I gave myself. Maybe with a prime lens I could even fool the algorithm, but with a zoom there's no way. Thanks I recall backscatter suggesting to override this value. I need to find this article Link to comment Share on other sites More sharing options...
Guest Posted March 13 Share Posted March 13 2 hours ago, Davide DB said: Yes, I know. I was asking to know if other people had noticed these differences in the water. On land there are not. Hence the explanation I gave myself. Maybe with a prime lens I could even fool the algorithm, but with a zoom there's no way. Thanks I have the 28mm prime I can try it with the WWL-1 and set to 20mm instead Consider that Sony does not have lens stabilisation is only IBIS so maybe different Link to comment Share on other sites More sharing options...
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