Good luck with your photo sales! Thanks a lot in advance ! While both cameras spread their photosites across the same surface area of a full-frame sensor, the 36 MP A7R trumps the 12 MP A7S for exposure latitude flexibility in raw post-processing at ISO 100 through 6400. Upgrading to the latest sensor technology every 3 to 4 years. This is a photo of a high dynamic range scene: Notice how the photo portrays both bright whites (the flower) and dark blacks (the background). This is in comparison to the company’s smaller, 1.5× crop-sensor “DX” cameras, and extremely small 2.7× crop-sensor “CX” cameras. Focusing ability through the viewfinder may be roughly similar with the new RX10 iv versus DSLRs like Nikon D7500, except D7500 is better at focus tracking in action shots (which I never use anyway). It won’t come cheap. Click here for Tom’s latest camera recommendations. I decided to buy a new DSLR but I didn’t want to spend a fortune on one, and I obviously don’t need a super-high res body like the D850. Alternatively, PC software or camera firmware using HDR (High Dynamic Range) imaging lets any size of sensor greatly increase an image’s dynamic range by combining multiple exposures. With patience focusing using Sony RX100’s tilting LCD with digital magnification, I was able to capture some pleasing shots of tiny wild Calypso Orchids. Hi Tom, If you have a full frame sensor and divide it up into 10 megapixels, you’ll end up with some pretty large pixels. Dynamic range refers to the range of light and dark tones in a scene. In particular, smaller pixels produce more noise, especially in low light. But from F8 onwards the quality starts to decrease serioulsy, and when you reach the F16 the quality plummets. It has Nikon’s top 153-point autofocus system, the company’s highest resolution 45-megapixel sensor, a surprisingly high frame rate of 7 FPS (9 FPS with the battery grip), and nearly every one of Nikon’s top features. The shutter speeds will be the same across all the cameras. Do you think I would do well to sell the D4 to get a D850? If you’re interested in greater resolutions and better low light performance and you want a wider field of view, go with a full frame camera, especially if you’re willing to pay for it. That said, the Nikon D5 is so specialized that many photographers don’t even have it on their radar. An evocative image can clearly be created with any decent camera in the hands of a skilled or lucky photographer. They struggle to properly capture lights and darks in the same scene. (bought it very cheap) I uses a dumb adapter for this. APS-C cameras don’t yet offer the advanced BSI technology that is found on Sony’s latest 1″ sensor (which is built into my list of best portable cameras). Now if I were to say get a 1inch with 400mm micro 4/3 with a 300mm or an APS-C with a 400/500mm. [You can calculate this as the diagonal crop factor difference of 1.8 times larger, between APS-C and 1″ sensors. Canon’s crop sensor cameras tend to be 22.5x15mm.Other camera manufacturers have their own crop sensor dimensions. Digital cameras perform best with lenses optimized specially “for digital”, using “image-space telecentric” designs, in which all the rays land squarely on the sensor (as opposed to having incoming rays emerge at the same angle as they entered, as in a pinhole camera). Thanks for your question about sharp telephoto magnification of birds photographed on a 20-megapixel Sony RX10M4 shot at 600mm equivalent, compared to cropping a 24-mp full-frame-sensor image to the same angle of view after shot at 240mm on a Sony A7iii mounted with Sony FE 24-240mm f/3.5-6.3 OSS lens. I know there are some good prime lens, like the Sigma 19mmf/2.8 or Rokinon 21mmf/.1.4 but I’d like a all-in-all as I would’t like to change the lens everytime I want to fo a portraing or a landscape shot. Instead move closer before shooting, or crop at editing time. This is a photo of a low dynamic range scene: The shot is mostly midtone pinks, and there’s not much difference between the lightest and the darkest parts of the scene. Yearly advances of 2014-16 put the sweet spot for serious travel cameras between 1”-Type and APS-C size sensors. What are the D750’s drawbacks? I have owned a Nikon D3100 with 18-55 and 55-200 Nikkor VR lenses for many years now and have been very happy. Using a top lens in terms of large diameter, effective stabilization (IS, VR, OIS, etc or tripod), zoom range, bright/fast aperture and good glass. The 18-300 only reaches from 27-450mm equivalent, a 17x zoom, whereas RX10 iv reaches angles of view from 24-600mm equivalent, an impressive 25x zoom, remarkably sharp throughout, considering its portability. This is true for landscape photographers, many travel photographers, night photographers, and more. When you compare wide angle studio scene image quality at http://www.dpreview.com/reviews/sony-alpha-a6500/9 (select Canon 7D, 7D Mark II, and Sony RX10 III from drop down menus) you get equal or sharper results with a lighter-weight Sony A6500 (2016, 24mp) or A6300.