Upload & Sell: Off
| p.1 #3 · Cine lens vs photo lens. Can someone educate me? |
Not a video person, but I can think of two characteristics of a video lens that are different than a photo lens.
1) When you change focus on a photo lens, it may change the effective focal length of the lens slightly. This doesn't effect photos much as you take one instant in time with the focus fixed. In a movie, it is highly distracting to have the periphery of the shot move as the focus follows a subject in frame, or switches from one subject to another. Good cine lenses minimize this effect.
2) A cine lens aperture is rated in transmission stops (T-stops) This is like a f-stop, but takes into consideration how much of the light actually makes it through the lens. Better lenses (better optical coatings on the elements) transmit more light. Rating lenses this way allows a director to swap between types (or brands, or quality) of lenses and set the lens to allow the same amount of light through. When shooting on film, and having multiple camera vantage points, this allows cutting between views without the light level changing in the finished product.
I don't know a thing about the lenses you are considering, so perhaps someone with experience with them can chime in.