Nikon D610 Camera
Nikon D610 is an upgrade from the previously released D600 which had some shortcomings. With this version, Nikon has addressed many of those issues while also upgrading its performance. Overall, this is a budget-friendly full frame camera that's worth buying if you're unsure which model to choose.

Technical Specifications:
- 24.3 megapixel full frame CMOS sensor combined with EXPEED image processing
- Multi-CAM 4800 autofocus sensor
- 3.2-inch screen (921K dots)
- 39 autofocus points
- ISO100 – 6400 (expandable to 25600)
- Continuous shooting speed of 6 frames per second
- Full HD 1080/30p video recording
Sony Alpha A7 Mark II Camera
Building on the success of its predecessor, the A7 Mark II comes with significant improvements such as a larger body, better grip, enhanced display, and various unique features for video shooting along with 5-axis image stabilization.

Technical Specifications:
- 24.3MP Fullframe Exmor CMOS sensor and BIONZ X image processor
- 3.0-inch LCD with 1,228 million dots and OLED electronic viewfinder
- Video recording: XAVC S 50 Mbps, AVCHD 2.0 28 Mbps, 1,920 x 1,080 pixels
- 5-axis image stabilization
- Continuous shooting: 5 frames per second
- ISO 50-25600 (expandable to 51200)
- Integrated Wi-Fi and NFC technology
Nikon D750 Camera
Essentially, the Nikon D750 still utilizes a 24.3MP full frame CMOS sensor but now with an EXPEED 4 image processor similar to the Nikon D810. Therefore, some features between these two cameras may overlap. However, with significant upgrades in both design and functionality, the Nikon D750 remains a sensible choice in the budget-friendly full frame camera segment.

Technical Specifications:
- 24.3-megapixel Full frame CMOS sensor
- EXPEED 4 image processor
- Multi-CAM 3500FX autofocus sensor
- 3.2-inch screen (1,229k dots)
- 51 autofocus points
- ISO100 – 12800 (expandable to 51200)
- Shutter speed 1/4000 – 30 seconds
- Continuous shooting speed of 6.5 frames per second
- 2 memory card slots
- Full HD 1080/60p video recording
- Integrated Wifi
Canon EOS 6D Mark II Camera
Considered the lightest DSLR camera in the full-frame DSLR lineup, the EOS 6D Mark II is compact yet powerful, promising to elevate your image quality to new heights.
This camera utilizes a 26.2-megapixel sensor and Dual Pixel CMOS AF processing, with a tilting touchscreen LCD that allows for spectacular photo and video capture with lightning-fast AF system, touchscreen operation, and shooting from multiple angles. Additionally, it features unique 5-axis image stabilization to minimize vibrations during shooting, resulting in sharper and clearer images.

Technical Specifications:
- Sensor: 26.2 MP, full-frame, 6,240 x 4,160 pixels
- Image Processor: DIGIC 7
- Screen: 3-inch touch LCD, Clear View II, swivel and tilt
- ISO: 100 – 40,000
- Shutter Speed: 1/4,000 second
- Continuous Shooting: 6.5 fps
- Metering Sensor: 7560-pixel RGB+IR (similar to EOS 80D)
- Video Recording: Full HD 1,920 x 1,080 pixels @ 60 fps / 30 fps / 24 fps
- Connectivity: Wi-Fi standard n, Bluetooth 4.1 LE, NFC, GPS + GLONASS + QZSS
Above are some affordable full frame cameras that anyone can acquire to serve their photography passion. Hopefully, this information will be valuable for you when searching for a suitable camera for yourself.