Buying a new camera for non photographer need a detail guidance, especially with the many types of cameras on the market and also many brand which have its specialties. First we will confuse with which brand is better? and then which type is suitable with our need.
This post will try to help the reader who want to buy new DSLR camera. And we decide to make comparison on Nikon DSLR camera. Camera types are Nikon D90
versus Nikon D3100 
which have double price difference. Let us consider some specifications differ between these two cameras.Dynamic Range
Nikon D90 has more dynamic range i.e. 12,5 EV, 1,2 EV higher than Nikon D3100 which is only 11,3 EV.
Screen resolution
Nikon D90 has much higher screen resolution i.e. 930k dots, too far if we compare with Nikon D3100 which is only 230k dots, more than 4x higher screen resolution.
Overall image quality
Nikon D90 has around 10% better image quality than Nikon D3100, for 100 range we can state 73.0 vs 67.0.
Viewfinder size
Nikon D90 equipped with significantly larger viewfinder than Nikon D3100; 0,63x vs 0,51x, more than 50% larger viewfinder.
Low light performance
For this parameter, both cameras have almost the same quality, Nikon D90 is slightly lower noise at high ISO; 977 ISO vs 919 ISO.
Battery life
Nikon D90 has significantly longer battery life than Nikon D3100; 850 shots vs 550 shots, more than 50% more shots per battery charge.
Shutter lag
Nikon D90 has less shutter lag than Nikon D3100; 208 ms vs 279 ms, around 30% less delay when taking photos. This feature is helpful when we need to take lots of photos of a brief moment.
Lens focus motor
Nikon D90 has a built-in focus motor. This feature is not available in Nikon D3100.
Viewfinder
Nikon D90 has a pentaprism viewfinder whereas Nikon D3100 has pentamirror. Pentaprism viewfinders are typically brighter.
Continuous shooting
Nikon D90 can shoots faster than Nikon D3100; 4.5 fps vs 3 fps, 50% faster continuous shooting.
Sensor size
Talking about sensor size, Nikon D90 has slightly larger sensor; APS-C 23.6x15.8mm vs APS-C 23.1x15.4mm
Color depth
These both cameras have almost the same color depth, Nikon D90 is only 0.2 bits better in color depth; 22,7 bits vs 22,5 bits.
Start up delay
Even tough has a lot of better features, Nikon D90 has less startup delay; 300 ms vs 400 ms, compare with Nikon D3100.
See the detail Specification of Nikon D90 here
.After we review the advantages of Nikon D90 compared to the Nikon D3100, it's time to find out what features are superior to the Nikon D3100.
Movie format
Nikon D3100 has higher movies resolution than Nikon D90; 1080p @ 24fps vs 720p @ 24fps. Nikon D3100 produces higher resolution full HD (1080p) video.
Video autofocus
Nikon D3100 is equipped with contrast detection, which is not available on Nikon D90. This feature will automatically focuses shooting video.
True resolution
Nikon D3100 has higher true resolution; 14.2 MP vs 12.2 MP. This Nikon D3100 could capture around 20% more detail in your photos than Nikon D90.
Weight and Dimension
Nikon D3100 has lighter and smaller body than Nikon D90. Its dimension is 124x96x73 mm vs 132x103x77 mm. For the weight, Nikon D3100 is 30% lighter; 505 g vs 703 g.
Light sensitivity (boost)
Nikon D3100 has better boost ISO than Nikon D90; 12,800 ISO vs 6,400 ISO. The D3100's boost ISO is 1 f-stop better.
See the detail specification of Nikon D3100
.From comparison between Nikon D90 versus Nikon D3100 above, we strongly recommend you to buy Nikon D90. The higher price is still comparable with the advanced features of Nikon D90.
See the update price of Nikon D90 here
.See the update price of Nikon D3100 here
.
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