Parts and Controls D3100

1	Mode dial	2	Release-mode selector	3	Information button
4	Exposure compensation button/Aperture button/Flash compensation button	5	Shutter-release button	6	Power switch
7	AF-assist illuminator/ Self-timer lamp/ Red-eye reduction lamp	8	Accessory shoe (for optional flash units)	9	Flash mode button/ Flash compensation button
10	Microphone	11	Function button	12	Lens release button
13	Playback button	14	Menu button	15	Thumbnail button/Playback zoom out button/Help button
16	Playback zoom in button	17	Information edit button	18	Viewfinder eyepiece
19	Diopter adjustment control	20	AE-L/AF-L button/Protect button	21	Command dial
22	Live View switch	23	Movie-record button	24	Multi selector
25	OK button	26	Delete button	27	Speaker
28	Monitor

Lens Compatibility D3100

Compatible CPU lenses

This camera supports autofocus with AF-S and AF-I CPU lenses only. AF-S lenses have names beginning with AF-S, AF-I lenses names beginning with AF-I. Autofocus is not supported with other autofocus (AF) lenses. The features available with compatible CPU lenses are listed below:

Lens / Accessories	Camera settings
	Focus			Mode		Metering
	AF	MF (with electronic rangefinder)	MF	Auto and scene modes; P, S, A	M
						3D	Color
AF-S, AF-I NIKKOR1							-	2
Other type G or D AF NIKKOR1	-						-	2
PC-E NIKKOR series	-	3		3	3	3	-	2,3
PC Micro 85mm f/2.8D4	-	3		-			-	2,3
AF-S/AF-I teleconverter5	6	6					-	2
Other AF NIKKOR (except lenses for F3AF)	-	7				-		2
AI-P NIKKOR	-	8				-		2

•  : Compatible
• -  : Not Compatible

1. Use AF-S or AF-I lenses to get the most from your camera. Vibration Reduction (VR) supported with VR lenses.
2. Spot metering meters selected focus point.
3. Can not be used with shifting or tilting.
4. The camera's exposure metering and flash control systems may not function as expected when the lens is shifted and/or tilted or an aperture other than the maximum aperture is used.
5. AF-S or AF-I lens required.
6. With maximum effective aperture of f/5.6 or faster.
7. When AF 80–200mm f/2.8, AF 35–70mm f/2.8, AF 28–85mm f/3.5–4.5 (New), or AF 28–85mm f/3.5–4.5 lenses are zoomed all the way in at the minimum focus distance, the in-focus indicator may be displayed when the image on the matte screen in the viewfinder is not in focus. Focus manually until image in viewfinder is in focus.
8. With maximum aperture of f/5.6 or faster.

Compatible Non-CPU lenses

Non-CPU lenses may only be used when the camera is in mode M. Selecting another mode disables the shutter release. Aperture must be adjusted manually via the lens aperture ring and the camera metering system, i-TTL flash control, and other features requiring a CPU lens can not be used. Some non-CPU lenses can not be used; see "Incompatible Accessories and Non-CPU Lenses," below.

Lens / Accessories	Camera settings
	Focus			Mode		Metering
	AF	MF (with electronic rangefinder)	MF	Auto and scene modes; P, S, A	M
AI-, AI-modified NIKKOR or Nikon Series E lenses	-	1		-	2	-
Medical NIKKOR 120mm f/4	-			-	2,3	-
Reflex NIKKOR	-	-		-	2	-
PC NIKKOR	-	4		-	2	-
AI-type Teleconverter	-	5		-	2	-
PB-6 Bellows Focusing Attachment6	-	1		-	2	-
Auto extension rings (PK-series 11A, 12, or 13; PN-11)	-	1		-	2	-

•  : Compatible
• -  : Not Compatible

1. With maximum aperture of f/5.6 or faster.
2. Exposure indicator can not be used.
3. Can be used at shutter speeds slower than flash sync speed by one step or more.
4. Can not be used with shifting or tilting.
5. With maximum effective aperture of f/5.6 or faster.
6. Attach in vertical orientation (can be used in horizontal orientation once attached).