Best interchangeable lens camera (Full-frame)

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Leica M (Typ 240)

This model follows in the great tradition of Leica's M-series rangefinder but in full digital glory, with a 24-megapixel image sensor.

This is the first M to feature Live View and Live View focusing via its 3-inch display.

The camera's top and base plates are of solid brass and the body is of durable magnesium alloy. Specially designed rubber seals shield it from splashes and dust.

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Nikon D610

This is a minor upgrade of the Nikon D600. Upgrades include quiet continuous mode (3 frames per second or fps), slightly faster continuous shooting (5.5 to 6fps) and improved auto white balance.

It shares the D600's full-frame 24.3-megapixel CMOS sensor, 39-point autofocusing system, 3.2-inch display and dual SD card slots for either extra storage or rolling back-up.

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Nikon Df

Inspired by the vintage FT and FM series of SLR cameras of yesteryear, the Df focuses on pure photography. It shuns video recording, despite having a 16.2-megapixel CMOS sensor with Nikon's latest Expeed 3 image processing engine.

Solid yet lightweight at only 710g, the Df is the company's smallest and lightest full-frame DSLR. The lens mount has a special foldable manual tab that allows old Nikkor lenses dating back to 1977 to be used with it.

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Sony a7R

Sony's mirrorless camera with a full-frame image sensor comes in two models that are very similar.

This R version has an image sensor with a higher megapixel count of 37.4 and without optical low-pass filter, which reduces moire or wavy patterns in images, but it also reduces image sharpness and quality. This model has a hybrid autofocusing system.

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Sony a7

This version is for the budget-minded photographer who is after a full-frame mirrorless camera but does not need the highest image quality.

Its image sensor has a moderate megapixel count of 24.3, and like the R version, it has a 3-inch tiltable display, 2.4-million-dot electronic viewfinder and weather-sealed magnesium alloy body with Wi-Fi and Near Field Communication connectivity. And, it is $800 cheaper than the a7R.

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