On the C-mount camera theme:
I think the idea goes too far. I don't have a problem with a 3x crop factor. An f/1.4 lens would still have the DoF of an equivalent f/2.8 APS-C lens which in many cases is good enough. And the camera would be portable (which mFTs aren't) and ISO only one step less than FT.
However, the C mount was made for movies and almost all lenses aren't meant to resolve beyond 3 MPixels. Stopped down enough they probably do, but that doesn't necessarily make C mount lenses a desirable thing.
Originally posted by Mistral75 Yes, there are very good lenses among the 16mm lenses: Carl Zeiss, Kern Paillard, Angenieux, Schneider Kreuznach and more. Quite expensive (second hand) though.
More there:
US List of 286 c mount lens, That's an interesting list. But nevertheless, I doubt many of them qualify for still images.
Another very interesting list of C mount lenses is this:
->
PENTAX CCTV Zoom Lenses or
->
All PENTAX CCTV Lenses
with an f/1.0 lens:
or the following 110x zoom Pentax C mount lens:
The lenses span varying image circles, up to 2/3" (about 3x crop factor); sometimes more (1"; 2x crop or FT).
With their impressive list of C and CS mount lenses, a C mount mirrorless may indeed be an interesting option for Pentax if:
1. they offer a bunch of optically very good and newly developped still image lenses with it.
2. operation as a video camera is very good (AF, tilt&swivel monitor, EVF, manual overrides etc.).
Pentax has
many more C/CS mount lenses than they have K mount lenses and their most expensive lenses are C mount and exceed 10,000 $!
Maybe, let me finish this section with a citation from somebody who mounted a Pentax C mount lens on a mFT camera:
Quote: I use this lens on my M4/3 camera body with an adapter, so my review is directed toward that application. The Pentax lens works better than expected. True enough, there is some vignetting in the corners, though fairly minor when shooting in 3:2 aspect ratio (which is what I mostly shoot at with this lens mounted). The vignetting is functionally a non-issue if shooting wide-screen HD video, but I'd be lying if I said it wasn't there.
The lens is great as a low light normal with varied uses. Wide open, it can be used as an effects lens to evoke a "toy camera" kind of look. Stopping down to f/2, it sharpens up noticeably, but still gives your photos and interesting feel. Stopped down to 4 or 5.6 and it's fairly sharp through most of the frame, though you'll still notice some peripheral defocus, especially toward the corners. At these middle f/stops, it's capable of resolving detail to a surprisingly satisfactory degree. Of course, it doesn't resolve quite as much at the pixel level as an actual made for M4/3 lens or an adapted M-mount lens, but it's good for everyday shooting, general street photography, or low-light endeavors.
For my money, where the lens is especially good is in shooting HD video, this if you're looking for a manageable manual focus lens to pull or throw focus. This is at least half of what I was hoping for when I purchased this lens.
Watch out for the tiny screws. They're easy to lose. I'd recommend taking them out. For special use, you can keep on hand one of the larger thumb screws (these come with the lens) for shooting video and desiring to pull or throw focus.
Read more:
Pentax C22525KP 1" C Mount 25mm F1.4 Manual Iris Lens Reviews | Buzzillions.com On another topic:
Originally posted by eurostar Thanks for the link. I expressed my doubts about the naming as well. Pentax NC is the name of an existing Pentax bag series.
However, the name (NC mount) would actually make sense if it stood for "New C mount" which could mean C mount backward compatible to support existing C mount lenses but with electronic contacts added for future applications. That would make Pentax jump ahead of the rest of the pack somehow
The C/CS mount has 1 inch diameter and 17.526mm (cine) or 12.526mm (cine short) flange distance and is specified to illuminate an up to 1" image circle. So, it is specified like the 35mm K mount shrunk 1.7x and flange distance then halfed. I.e., mount diameter and image circle match. That makes the CS mount much more attractive for mirrorless than Micro FT which still suffers from a huge mount compared to the tiny sensor diameter. The mFT mount really should fuel a 35mm FF sensor ... A C lens just needs a 5mm distance ring when mounted onto a CS mount.