Aperture Ring
The Aperture Ring is the rotating ring on the lens barrel that controls the selection of f-stops. The aperture ring is where you will find the minimum and maximum f-stop settings for a given lens, and the critical focus mark.
Aperture ring
A ring that is situated near the lens throat on all manual focus lenses and some autofocus models that adjusts to control the amount of light reaching the film or CCD when recording an image.
Aperture ring
A ring, located on the outside of the lens usually behind the focusing ring, which is linked mechanically to the diaphragm to control the size of the aperture; it is engraved with a set of numbers called f-numbers or f- stops.
The aperture ring. This is a narrow rotating ring on the barrel of the lens. It is generally located close to the body of the camera.
The focusing ring. This will be a wider ring located near the front of the lens.
The aperture ring of a typical 50mm lens has the following values etched onto it: 1.4, 2.0, 2.8, 4, 5.6, 8, 11, 16, and 22.
Using aperture ring
1: Prohibited
2: Permitted
Enable or disable shutter release when aperture set to value other than A ...
Incompatible aperture ring.
As noted above, some lenses, such as older Pentax M42 threadmount lenses, can't be stopped down manually or else require an EOS->M42 adapter that holds down a pin on the lens mount.
On your lens, you should have an aperture ring marked with a series of numbers - 4, 5.6, 8, 11, 16, 22 etc. These have nothing to do with your local lotto shop but they are important nevertheless.
Automatic: The most popular type; controlled by a single aperture ring; during viewing and focusing, the diaphragm remains wide open, allowing the maximum amount of light to go to the viewfinder for a bright and easy-to-focus image; ...
The numbers on the lens aperture ring and the camera's LCD (where applies) that indicate the relative size of the lens aperture opening.
Couple that with the fact that it's tiny mount to sensor distance, and you have a camera that with the right adapters can use just about any lens made in the past 50 years (as long as it has an aperture ring).
He would use the aperture ring on the camera to focus. Today he shoots digital. His workhorse is a Canon EOS 350D, he also uses a Canon EOS 5D.
8G IF-ED AF-S DX Zoom: As long as you're 100% digital and can live without an aperture ring, this sounds like a no-brainer replacement for the 18-35, and possible the 17-35f/2.8 as well.
F-number : The numbers on the lens aperture ring and the camera's LCD that indicate the relative size of the lens aperture opening.
They don't have an aperture ring. Aperture setting is made through a "Sub-Command Dial" on modern auto bodies. G lenses were designed to weight less and be less expensive than their counterparts with an aperture ring.
If this is the case, you may wonder why Nikon even puts aperture rings on their lenses these days.
The next test is with the aperture ring set at the widest aperture. Position a bright light at the other end of the lens and look through it. You may spot some marks that look like spider webs. This is fungus inside the lens and you don't want it.
Wheels and buttons replaced the shutter dial on the camera and the aperture ring on the lens on many models, although some photographers still prefer shutter dials and aperture rings.
On manual cameras, the aperture size is controlled by moving the aperture ring on the lens. Generally the lens has detents (or stops) at the standard ƒ-numbers.
Stop the lens all the way down to f/22 with the aperture ring on the body, and hit the stop-down button.
The Light-value system is a device, usually found on the lens barrels of leaf-shutter cameras of the late 1950s, that couples the speed and aperture rings.
Set your camera to manual focus mode. This will allow you to move the aperture ring to your desired setting and manually operate your focusing ring, both of which are integral to determining hyper-focal distance.
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the problem, however is that the nikon 105mm i use does not have an aperture ring. manually keeps it "locked" makes it all difficult.
the other type i use is the reveresd 50mm. its great but you need a tripod or you must keep it absolutely steady.
Continuously adjustable lens aperture consisting of interposed metal leaves. Adjustment is made by moving the aperture ring on the lens barrel.
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severely backlit situations did I resort to exposure compensation and/or manual metering, using the left-and right-pointing LED arrows and a central red “correct exposure' circle. The arrows indicate which way to turn either the aperture ring ...
Either sunlight or flashlight will do (I used a small studio flash for the snails), but you must get the aperture ring closed down to f22 or whatever your smallest aperture setting is.
F-number (See also: Aperture) The set of numbers on the lens aperture ring indicating the relative size of the lens aperture opening.
The depth of field on an SLR is marked between the aperture ring and the focusing scale. Use the depth-of-field scale as follows: 1. Focus on the subject. 2. Select the f/stop. depth-of-field scale. You may have to estimate the distances.
 See also: Aperture, Lens, Camera, Lenses, Focus
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