Hello!
- Regarding the lighting, the "technical datas" (the graphic) which show you what is burned, do not specifically says if it's enough light for the kind of action you are capturing.
I mean, a picture can be normally exposed, or over-exposed or whatever, but depending of context, it changes with what your brain expects.
Take a horror movie with vampires, I bet the graphics will show you good exposition (the movie is suitable for cinemas and considered as "good") but of course it's something very dark, not suitable for DPs!
So those graphics are quite usefull but not enough!!
Brains of porn customers have been trained since 15 years to see very bright and ligthened pictures. The main reason is that most of porn producers are not coming from cinema world, so they can deal good with heavy strong lighting (that ensure to have a good stuff). Most of them wouldn't be able to make some "dark lighting" of what you can see in cinema (which are of course well exposed). The easiest the better! Then customers's brain is trained with that, because they are fed exclusively with that sinces ages!
Then you can try many different things in your production, but I think heavy lighting is the key if you want to make viewers happy. In any case, natural lighting will be easy to make people happy with, in my opinion, only with very sunny days, and by pushing the f/value of the camera's lens to the smallest number, but then you get a very short depth of field.
By the way, you can probably correct the lighting a bit during editing, without loosing quality. Of course with 4K, it will take a while on processing!
And yes, contrary to 3D, 4K machines don't need extra light (for 3D you would need to double the ligthing!!)
Last thing, in my opinion, shooting with natural light is very risky! More when you shoot very long and complicated scenes which last several hours... I remember once, shooting porn a very sunny day, I said ''ok, natural light is enough", then after 45 minutes came a very big storm, and I was in real trouble to make fit the first part with the end! Even in summer this shit can happen. Now, I think natural lighting is very very risky, and I 'd consider it only on very special occasions!
-Regarding the sharpness, yes, this scene presents a very narrow depth of field. That's of course beautiful, but sometimes not suitable for following gonzo action.
I think Giorgio, you started to study the material from competitors (tushy and Co). After looking closely yours, my feeling is that, it's very difficult goal to make the same on continuous "gonzo style" filming. If you look closely on Lansky stuff, most of the movie in filmed "cinema-like", I mean he takes an angle, and keeps it. Action is followed by changing the angle and editing between. Then it's a HUGE work on editing. And another style, another way of excitation.
I did it with canon C100 and C300, it's really another job. I mean, as a crazy anal director and porn-boy, such way to work may be really boring and "non-natural". Compare the Lansky stuff (which is nice indeed, but very "artificial" and not "rooted in the flesh") with some good Mason for example.
So, your stuff is much more on being "inside" the action, much more instinctive sex. But technically, with very narrow depth of field, I don't think it's very possible to follow the action.
I think it's a choice between cinema-like with narrow dof which requires horrible editing work (and more preparation in the camera work before the scene) like Lansky does, and keeping a gonzo-instinctive style.
Compare with similar production which stay more on gonzo action than cinema-like (Mason, etc), they have quite similar picture than Lansky, but much much more DEEPER depth of field, and then the capture of the action is more gonzo-like, with less editing between each angle.
So in conclusion, your shift in production sounds great, I think you're trying to find yourself on a new way and that's pretty cool. I'm sure after few hesitations you'll get it!!
-To mix the two things I say above, if you reduce light dramatically (natural light), then you have to go to small f/numbers, then you get a very narrow depth of field (the case here). If you light it up, then you can close lense at f/8 for example, and get a little deeper dof, and then it's more suitable for gonzo action!
Do you have the f/value you used in this one?
-Sharpness II: this time, about sharpness of the details of the scene. It seems the lense you use is very soft (nothing to do with depth of field). Sharper image would be great. Many reasons possible: the lense itself (=> change it), something on the editing (=> you're compressing the original file even in 4K, and at that stage maybe it can happen something), or soft lenses for the f/value you used (some lenses are shitty with f/2.8 and are great at f/8 for example, I bet it's the case here!): maybe try the same with more light and another F/value !!
-Sound is pretty low and not so good. Can come from the editing as from the camera settings. Maybe by gaining few decibels on the editing you can solve it, or at least make it better!
Anyway now you're getting an heavier camera. That's fine. You'll not loose time going to fitness center. You'll have more time to cast new girls!! That's a good news
