is it possible to use Nikon lens on 2/3" scarlet?

[Nigel Ong]

Hello,

Peace guys.
Does anyone know if it's possible to use Nikon lens on 2/3" scarlet? Since it memtioned that it has an accessory "interchangable lens mount", do it mean Nikon lens works by adding this accessory? if so, does it fit perfectly or do we need to adjust something?
Also, is it possible to use electronic AF lens on 2/3" scarlet?
Thank you.

Nigel.

 

[Dan Hudgins]

image vs. format

image vs. format

Does anyone know if it's possible to use Nikon lens on 2/3" scarlet?

You can always use a Nikon to C mount adapter to mount the lens, but the sensor on 2/3" is only 11mm diagonal so the image will be a heavy center crop from the SLR lens size format.

Many SLR lenses and DSLR lenses only resolve 40lp/mm to 60lp/mm. For use on a 2/3" sensor you should use lenses that are more in the range 120lp/mm to 240lp/mm at 80%MTF to get as much out of the sensor as it can give.

If you use SLR lenses, then they will be somewhat soft wide open for the most part, when stopped down to between f/4.5 and f/6.3 they may be usable but the focal lengths are quite long so then mostly for nature, sports, and surfing films, maybe...

If you want to use SLR lenses, then a larger sensor might give better results. Relay Optics to shrink the SLR size image to 11mm at 250lp/mm would cost quite a bit, so that is why there are few if any good image relay systems for that use. Maybe someone in Asia could make one at a low enough cost to sell? The relay optics focus the whole SLR lens image down to the smaller size of the 2/3" 11m sensor size, that way wide angle lenses give their full wide angle, and the image gets sharper since you are reducing the size of the circle of confusion of the Nikon lens to more than double the lp/mm and get it into the range required for 3K resolution in the 2/3" Scarlet camera.

 

[Nigel Ong]

Thank You for your answer, Mr. Dan Hudgins.

So if I make a tube and put it between the lens and the 2/3' scarlet, is it going to help fitting the image on the sensor?

and do you know if electronic AF lens is working on 2/3" scarlet.
thank you.

Nigel.

 

[Liam Hall]

So if I make a tube and put it between the lens and the 2/3' scarlet, is it going to help fitting the image on the sensor?

No. It will just shift the focal plane.

 

[Jeff Kilgroe]

Increasing the FFD (flange focal depth) or distance between the rear of the lens and the sensor, you will enlarge the image circle and will thus create a macro effect or increased telephoto effect at the expense of more light loss. You will also lose the ability to focus at infinity and possibly some close focus abilities at the other end of the focal range.

 

[Nigel Ong]

Thank you guys!

 

[Dan Hudgins]

Relay optics

Relay optics

To fit an SLR image on a 2/3" sensor you need relay optics, these turn the image upsidedown unless some other optics are used. At the focal plane of the Nikon lens would be a field lens adjusted to focus the light from the inside of the Nikon lens to the inside of the realy lens.

To get the full speed of f/1.2 Nikon lenses the camera side of the relay optics would need to have a speed better than f/0.95, to get such fast optics to resolve 250lp/mm is very hard and would need Aspheric Lenses and probably 12 or more elements.

When you reduce the size of the image with a large enough relay lens you get more speed minus the T/ loss from the small reflections off the EBC multi-coating. You could expect from one to one and a half stop gain maybe.

The primary lens acts as a focal adapter to the rear group in the relay lens. As far as I know, no such adapters are made because making one would require skill and the price would be too high if made outside of China.