The rectangle design has a straight-forward layout with easy-to-read menu buttons and a touchscreen LCD that packs approximately 2.1 million dots. It felt warm to the touch but never felt overheated. The reason why you need a good heat sink is because full-frame sensors get warm, and a 4K full-frame sensor that promises minimal rolling shutter, will get even warmer. Sigma was able to shrink its size without the fp overheating thanks to a massive heat sink. Blackmagic's Pocket series cameras were game changers in terms of footprint and features, but the fp is about the size of a pack of playing cards at 4.4 x 2.74 x 1.78" (112.6 x 69.9 x 45.3mm) and weighs less than pound (422 g). The fp's most noticeable quality is its size. While the fp is designed for both stills and video, this will detail more of its video features. It’s also part of the L-mount ecosystem and can be paired with any L-mount lens from Leica, Panavision or Sigma, including its cine lenses. The fp has many features video shooters will enjoy including RAW internal recording, over 10 stops of dynamic range, zebra pattering, waveform display, timecode support, and a responsive touchscreen. They managed to do it all with impressive results for under $2,000. It's built around a 24.6MP back-illuminated Bayer CMOS sensor, which is also a first for Sigma as they exclusively used the Foveon sensor for its previous APS-C camera models.Įven with the larger sensor, Sigma set out to create the most compact camera on the market that is not only scalable, but offered still and video features associated with high-end image capture. The fp is Sigma's first attempt at a mirrorless camera with a full-frame sensor and what they were able to accomplish is quite outstanding. Small pixels in phones just makes this obvious.When a company develops a product for the first time something will be inevitably overlooked. Not at all, it's based on the observation that tiny, cheap phone lenses appear to outperform the center resolution of expensive full frame lenses. This is why, all else equal, lenses get larger and more costly as sensor size increases. Lenses designed for full frame sensors will, all else equal, show this weakness farther from the center, in absolute terms, than a lens designed to cover an APS-C sensor. In general, lenses have weaker performance in the “corners”. This has nothing at all to do with the question of the ability of a lens to cover a sensor diagonal at a given pixel pitch, as we compare full frame to APS-C in general, as in this thread. It should be uncontroversial that smaller pixels require higher resolution lenses to effectively sample them compared to larger pixels. The problem with the point is that it is based on the incorrect notion that sensor size is inherently, negatively correlated with pixel pitch, based on a false analogy between a cell phone camera sensor and much larger full frame and APS-C camera sensors. You would ideally want 625 LP/mm or 15,000 (!) per image height in full frame terms.Ī very good point which I came across recently when trying (and failing) to define "detail". My assumption is that few if any full frame lenses would deliver a satisfactory sharpness on a sensor like that of my phone with its 0.0008mm pixels. An APS-C lens is optimized for that diagonal, so may well be better than a crop from a FF lens.Ĭan you explain the concept of optimizing for a particular diagonal?Ī full frame lens can cover the middle of the sensor easily, so I would think the advantage would go the other way, assuming otherwise similar design parameters. Over the years, I've had far more photos spoiled by lens flare than any other lens problem. Imatest Version 4.4 supports all CPIQ v1 measurements:įor myself I would pick SFR but who knows what the OP meant. Or somebody could select some of the following and mention them by name: For instance, what he would aim at for "image quality", and whether a lens designed to cover APS-C could be designed to have more of it than one designed for FF and cropped. Somebody with that kind of background could make some useful comments on these topics. I don't think we have anyone on this forum who codes lens design software. and should tell us what is meant by "image quality". An APS-C lens is optimized for that diagonal, so may well be better than a crop from a FF lens. But, the image quality in crop mode with a FF lens will be better than with aps-c lens?
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