Panasonic Lumix 14mm pancake vs Rokinon 14mm T/3.1 Cine

[John Manfredi]

Ok so I might be confused but, is the Panasonic Lumix 14mm pancake a true 14mm or is it doubled by the crop factor? Or/and is the Rokinon 14mm T/3.1 Cine the same or is it really like a 28mm?

Also how does meta bones speedbooster play into the Rokinon 14mm T/3.1 Cine. Does it make it wider or are the lenses already designed for apsc sensors?

Are the Rokinon cine lenses full frame?

 

[maranfilms]

14mm is 14mm, it really doesn't matter. It's the measurement from the sensor to the lens. 14mm Panasonic lens should have the same field of view as a 28mm on a full frame body, due to the 2x crop factor.

The 16mm is APCS, does not work on full frame, 14mm does though.

 

[combatentropy]

Ok so I might be confused but, is the Panasonic Lumix 14mm pancake a true 14mm or is it doubled by the crop factor? Or/and is the Rokinon 14mm T/3.1 Cine the same or is it really like a 28mm?

What maranfilms said.

Ah, the perennial question.

If a lens says that it's a 14mm lens, then it is, scientifically, optically, indisputably, a 14mm lens. The trouble is, being a 14mm lens doesn't mean anything to you as a photographer, or cinematographer. A lens's focal length (like 14mm) means something useful to you as a cameraperson only when you also know your camera's sensor diagonal (like 22mm ("Four Thirds"), 29mm ("Super 35," depending on who you ask), or 43mm ("Full Frame 35mm" or "135")). These two numbers combined will tell you the fact you're really after, the angle of view, whether this is a 12° lens or an 30° lens or a 45° lens.

In the olden days, there was one main sensor diagonal, 43mm, the one for regular, full-frame, 35mm film. So photographers came to associate a given focal length with a given angle of view. "28mm is a very wide angle lens," "35mm is a nice photojournalist angle," "50mm is about what my eye's angle of view is," "85mm to about 135mm are moderate telephoto lenses, like for a portrait," "500mm is crazy long for shooting hyenas in the Sahara." These numbers and their associated feel are ingrained in the synapses of several generations of photographers, including many today. So when camera makers screwed everything up by making digital cameras with a sensor size other than the venerated Full Frame 35, their advertising departments decided it's easiest to say, well, it's like a 28mm lens, only it's a 14mm lens, because the sensor is half the diagonal of Full Frame, so it has a crop factor of 2.

So the real question is, what angle of view are you after? Is it about 75°, like a 28mm is on full-frame camera? If so, and if you're using a 4/3 camera like the AF100 which has a crop factor of 2, then you want a 14mm lens.

Also how does meta bones speedbooster play into the Rokinon 14mm T/3.1 Cine. Does it make it wider or are the lenses already designed for apsc sensors?

It makes it wider, by 0.7. So your 14mm literally becomes a 10mm lens, which is like 20mm in Full Frame 35 (very, very wide, people-look-dumb-kinda-wide).

Are the Rokinon cine lenses full frame?

Yes. "This lens is compatible with full-frame sensors," --- http://www.bhphotovideo.com/c/product/890620-REG/Rokinon_cv14m_c_14mm_T3_1_Cine_Lens.html