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So is the d7100 a DX camera?.
My lenses just have Nikkor AF on the body so I can't figure out if their DX or not.
Which cameras are FX for instance?.
The D7100 is a DX format.
The current FX cameras are the D5, D810, D750 and D610. Their sensor size is approximately the same size as the old 35mm film (36x24m).
The rest are DX cameras have a smaller sensor area (c. 24x16) which arguably gives lesser image quality due to the smaller pixel diameters and numbers of pixels squeezed onto the smaller sensor area. Of course you pay much more for the FX (full size) sensors.
In the early years of digital there were NO DX lenses. When you put a normal (FX) lens onto a DX camera, it looks through a smaller area in the middle of the lens....in other words it arguably zooms in and multiplies the magnification by 1.5. So a 50mm on a DX body would give you the same field of view as a 75mm on an FX body.
What this means is that you get a boost with telephoto lenses (i.e. 200 becomes 300) but at the wide angle you lose width ( i.e. You need a 10mm lens to get a 15mm angle of view)
So manufacturers started making corrected lenses ...DX lenses. These are adjusted back to give 'true' 35mm area of view values and tend to be more at the wide end to recover the lost width mentioned above. Therefore the 18-105 DX lens attached to a DX camera gives the same field of view as an 18-105 FX lens on an FX body. Putting a DX corrected lens on an FX body causes a few distortion problems and is not recommended.
I suspect all your lenses will be FX lenses. Hence my comment that your 24mm will be 36mm in old money...and you might want to consider a DX 18-105 or similar to give you a nice wide 18mm for scenery and groups.
Does that help?
Take a look at this website...a useful best prices site when buying equipment...but it also lists the current DX and FX lenses.
http://www.camerapricebuster.co.uk/Nikon/Nikon-DX-Lenses
Last edited on Mon Oct 24th, 2016 15:03 by Eric
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Eric