Wetpixel Live: Sony a7R V for UW Shooters?

[Isaac Szabo 90]

1 minute ago, Alex_Mustard said:

I had mistakenly thought that the Focus Unit was new. But as you all say, it is not. 

I did use the reversed viewfinder (designed so you can shoot without the relay). I didn’t try this on the Sony, only on my Subal SLR, as a preparation for Wetpixel Lembeh. Tried it in the pool and the sea (photo in the pool, taken with the A7RV). While it does a nice job flipping the image back to being correct, it does flip all the shooting information and also when you move the focus point, it goes in the opposite direction.

Ah well that's OK. It's not much of a problem for me anymore since I now know I can fix it by upgrading my camera. I also figured out a decent fix for my current setup by modifying my macro lens so the aperture can't open up as wide.

That's great that they're making a reversed viewfinder. I use it without the relay with a monitor that allows me to correct the inverted image, but it will be nice to have a viewfinder option. But yes, the shooting information, menus, focus point, etc is all reversed. I personally have been able to make do with that, but I can see how it wouldn't be worth it for some.

[hellhole 21]

Actually.. there is no dslr killer. The dslr will die of by itself.
If you are going to start
.. now... pick up something that guys abandoning to go mirrorless.

You should be able to get a good deal. Heh

Sent from my SM-S908E using Tapatalk

[ChrisRoss 150]

On 2/6/2023 at 10:33 PM, Interceptor121 said:

 

Mirrorless reduced flange distance actually comes at price of increased chromatic aberrations and distortion that get corrected in software. Making lens smaller has a price especially for wide angle

What Adam is referring to is that DSLR must use a retrofocus lens design to focus a short focus length lens on the sensor with a mirror box between the lens flange and the sensor.  This additional optics can degrade the image and for example Leica rangefinder lenses were highly regarded because they could be designed without the addition of retrofocus design elements.  

Unfortunately Leica lenses have problems on digital sensors as the light on the edge of the field arrives at a steep angle which is a problem for the microlenses above each pixel. So digital versions need a different design that brings in the corner rays at a less acute angle and having a shorter flange distance makes this easier to achieve.  They still may need some retrofocus correction depending on flange distance for very short focal lengths, but theoretically it possible to develop improved designs.  Whether this benefit is actually realised depends on the skills of the designer of each lens and the design criteria they are working with, compact and cheap kit lenses almost certainly won't see any benefit.

[Interceptor121 768]

3 minutes ago, ChrisRoss said:

What Adam is referring to is that DSLR must use a retrofocus lens design to focus a short focus length lens on the sensor with a mirror box between the lens flange and the sensor.  This additional optics can degrade the image and for example Leica rangefinder lenses were highly regarded because they could be designed without the addition of retrofocus design elements.  

Unfortunately Leica lenses have problems on digital sensors as the light on the edge of the field arrives at a steep angle which is a problem for the microlenses above each pixel. So digital versions need a different design that brings in the corner rays at a less acute angle and having a shorter flange distance makes this easier to achieve.  They still may need some retrofocus correction depending on flange distance for very short focal lengths, but theoretically it possible to develop improved designs.  Whether this benefit is actually realised depends on the skills of the designer of each lens and the design criteria they are working with, compact and cheap kit lenses almost certainly won't see any benefit.

To be frank when I look at Nauticam port charts and general lenses availability my take is that Nikon is lagging behind with lenses. They have as many solutions as Panasonic L Mount however looking at Canon the situation is better and when you look at Sony E-mount you have all choices except a native fisheye

We can digress that Nikon made 3 macro lenses that happen to fit into the blackwater use case but it took them 10 years to get there so eventually they will get there once the basics for Z mount are sorted

So for me it is not the Mirrorless are behind is that Adam and many other people here are Nikon users and Nikon Mirrorless is behind but am sure now that they stopped developing DSLR they will catch up

I am pretty sure a native fisheye is definitely not a priority while a short macro will come sooner