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Sony FE 24-50mm f/2.8 G announced


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Extends by what looks like an inch or so as you zoom in - see Sony video. MFD increase to ? 29 cm at tele end (18 cm at wide end). So needs a large radius dome to make use of full range (or just use it at wider end with smaller dome).

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Actually, it extends at 24mm, and retracts at 50mm according to this youtube video. So it should be possible to use behind a WACP-1 at least without vignetting. The same video claims the image quality is quite stellar

 

Regarding the 67mm filter thread size, the Canon RF 14-35mm F4 has a 77mm filter size, and that lens works with both the WACP-1 (personally tested) and the FCP according to the port charts. So it's promising. It should work with at least the WACP-1 and FCP, and perhaps also with the WACP-C.

 

If it does.. well, it would be quite a goldilocks lens for Nauticam's smaller water contact optics. Exciting times in Sony land. 

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Although the 28-60mm is a kit lens (and therefore is regarded by some to be inferior) it is quite a sharp lens, much better than the older Sony 28-70mm  (see e.g. https://dustinabbott.net/2020/11/sony-fe-28-60mm-f4-5-6-review/ or https://www.the-digital-picture.com/Reviews/Sony-FE-28-60mm-f-4-5.6-Lens.aspx)...

 

Therefore I think that an alternative lens for WACP/WWL-1 is not really required (only 28mm and up are useable with these optics and 50mm is not so much). It would be great if WWL-C, that requires 24mm and up, would be working with this lens (but maybe the lens is too big)...

 

Wolfgang

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I think the filter size is perhaps a proxy for front element and entrance pupil size.   What has to happen is that the light bundle that corresponds to a 130° field has to fit through the entrance pupil.  The entrance pupil is generally much smaller than the front element, so the front elemnt needs to capture the light bundle and as it passes through the elements in front of the entrance pupil it needs end up at a size that fits through without vignetting. 

 

The 14-35 is mentioned and that is on the FCP port chart and it was mentioned it works with the WACP-1 - presumably this is at 28mm focal length.  The combination of front element and entrance pupil size and location would be allowing the light bundle through.  The point of all this is that the lens in question 24-50 would potentially work with the FCP but the WACP-1 is probably less likely as it seems to favour 28mm f3.5 or f4 optics.  We won't really know until someone tests it.

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On 2/23/2024 at 4:12 AM, Chris Ross said:

I think the filter size is perhaps a proxy for front element and entrance pupil size.   What has to happen is that the light bundle that corresponds to a 130° field has to fit through the entrance pupil.  The entrance pupil is generally much smaller than the front element, so the front elemnt needs to capture the light bundle and as it passes through the elements in front of the entrance pupil it needs end up at a size that fits through without vignetting. 

 

The 14-35 is mentioned and that is on the FCP port chart and it was mentioned it works with the WACP-1 - presumably this is at 28mm focal length.  The combination of front element and entrance pupil size and location would be allowing the light bundle through.  The point of all this is that the lens in question 24-50 would potentially work with the FCP but the WACP-1 is probably less likely as it seems to favour 28mm f3.5 or f4 optics.  We won't really know until someone tests it.

 

Hi Chris,

 

As said, based on my experience with the Canon 14-35 F4, which works great with the WACP-1 between 28-35mm (even though not listed on Nauticam's official port chart), I'd expect this 24-50 to also work with both the WACP-1 and the FCP.

 

This is the Canon 14-35 F4 with the WACP-1 at 24mm F4.0 (yes, wider than the advertised minimum -- and the lower and upper lens hood show a little bit as a result. But they go away at 26mm. 

 

Andrei 

 

 

IMG_8309.jpg

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