Most entry-level and mid-price DSLRs sport an APS-C sized sensor, with the physical dimensions of the chip measuring 23.6 x 15.7mm (or 22.2 x 14.8mm on Canon DSLRs).
A full-frame sensor on the other hand has larger dimensions of 36 x 24mm - the same size as a frame of 35mm film, hence the name 'full-frame', and offering a surface area 2.5x larger than an APS-C sized sensor.
This allows for larger photosites on the sensor, delivering better light gathering capabilities, which in turn means better image quality - especially at higher sensitivities.
full-frame
Nikon D750
A full frame DSLR packed with features for a reasonable price.Sony Alpha A99 II
Sony’s flagship A-mount camera marries very high-resolution stills with 4K shootingRef.
http://www.techradar.com/news/photography-video-capture/cameras/best-full-frame-dslr-8-cameras-from-canon-nikon-and-sony-compared-1133732APS-C
Fujifilm X-T2 and X-T20
A stunning camera perfect for enthusiast photographers
Fuji X-T20
All the good bits of the X-T2 in a more affordable body
Sony Alpha A7R II
Sony's top mirrorless camera is a real show-stopper
Sony Alpha 68
(2016) near of 500€ (2017 june).
I prefer my Sony alpha 65 ;-)
with a wifi SD card if i need wifi connection
https://en.wikipedia.org/wiki/Eye-Fi
I prefer my Sony alpha 65 ;-)
with a wifi SD card if i need wifi connection
https://en.wikipedia.org/wiki/Eye-Fi
Nikon D3300
(2014) Not the most expensive entry-level DSLR (less than 350€; 2017 june), but we think it's the best...