Could Someone clear this up for me? After setting the shutter speed and aperture if it should stay set or does it automatically adjust because its jumps around on my fd91 screen i noticed while taking pictures!
P.S. Thank You , From a very novice camera user!
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I have a Z981 myself. I just set my camera as you did (to "A") but did not experience the issue you mention?
Just to be clear, remember that setting the camera to "A" means "Aperture priority", meaning that you can control the lens aperture (with the "jog dial" on the top of the camera) and the camera will automatically set the shutter speed to create a proper exposure. "A" does NOT mean automatic exposure control. You must use "P" (Programmed) mode to make the camera make all the decisions about shutter speed and lens aperture.
I am including a web link to the User Guide for the Z981. You might want to revisit the Guide to make sure you are using the correct settings for your pictures.
BTW, I like my Z981 quite a bit, especially the zoom. I've taken some great pictures with it.
The aperture is the opening in the lens through which light passes to the image sensor. Changing the aperture setting allows you to control the depth of fieldof a photograph. When the aperture is opened to a widersetting, (indicated by a lower f-stop number) more light is passed to the imagesensor, creating more shallow depth of field. Closing the aperture (indicatedby a higher f-stop number) allows less light to pass to the image sensor,creating wider depth of field. NOTE:The aperture setting is one of three primary settings usedto control the overall exposure of a photograph. The other two primary settingsare ISO and shutter speed. Because the three settingswork together to produce the overall exposure for a photograph, changingthe aperture setting will require complimentary changes to either the ISO or shutter speed to produce a properly exposed photograph. These changes will bemade automatically by the camera in the Auto, Program, Aperture-priority andShutter-priority modes. There are two ways tocontrol the aperture setting on the camera:
Aperture-priority mode (A)- When shooting in Aperture priority mode (A), you set the aperture value and the camera automatically sets the optimum shutter speed for you.
Manual mode (M)- When shooting in Manual mode (M), you control both aperture and shutter speed, which gives you maximum creative control to achieve the exact results you want.
If your camera is a Rebel XS you should have a dial on the top right with a series of letters and icons. To set your camera so you manually control the shutter speed turn this dial too "TV" (Time Value). This setting will allow you to select the shutter speed and the aperture will open or close to achieve the correct exposure. The "M" is (Manual) where you would select both the shutter speed and aperture "AV" is (Aperture Value) where the user selects the aperture they want and the shutter speed increases or decreases to obtain a proper exposure. The "P" (Program) mode allows the camera to automatically select the shutter speed and aperture
The EM doesn't really have a manual shutter speed setting. It does have a Bulb setting for long exposures and a 1/90 second manual for flash, but otherwise the camera automatically sets the shutter speed to go with the currently selected aperture.
Normally you would set the aperture and let the camera set the shutter speed. You can adjust the shutter speed by pressing the exposure compensation button for +2 stops. You can also adjust the exposure by changing the ASA/ISO setting.
If you need a manual, you can download one from http://butkus.org/chinon/nikon/nikon_em/nikon_em.htm
OM-20 was basically a upgraded OM-10 with the manual adapter built in and a number of other refinements.
The viewfinder has LED's to show the shutter speed recommended by the camera's lightmeter for the ISO and aperture selected. It also has an exposure compensation indicator (the +/- symbol) and an indicator for flash ready which doubles up as a post-exposure flash confirmation. There is also the indicator lamp to show manual mode has been selected. OM-10 lacks the manual mode lamp and the +/- indicator.
Like the OM-10, the OM-20 is primarily an aperture priority automatic camera. In this mode you set the ISO film speed, choose which aperture you wish to use (with the ability to use the lens depth of field preview button) and then the camera selects the correct shutter speed. The +/- exposure compensation control allows the user to tell the camera to modify the recommended shutter speed by up to two stops either way.
In manual mode, there is no manual metering. The light meter behaves exactly as it does in aperture priority mode and the viewfinder shows the recommended shutter speed and not the manually selected one. Correct metering is therefore a case of adjusting the aperture first, and then choosing the correct shutter speed indicated in the viewfinder. If the user then decides to select a different shutter speed, then the aperture ring must be adjusted to maintain the correct exposure. For example the aperture is set to f8 and the camera recommends 1/60th of a second. The user decides that a faster shutter speed is required and chooses 1/250th, but the viewfinder remains showing 1/60th. In order to keep the same exposure value the user must open the aperture by two full stops to f4. The camera's light meter will detect the new aperture setting and providing the light on the object is unchanged the viewfinder shutter speed display should now show 1/250th as well to confirm the correct adjustment. Alternatively, the user can choose the shutter speed first by looking at what has been set on the control ring (or by turning the ring to the end of its travel and then counting the clicks from there as all experienced OM users do) and then turning the aperture ring until the shutter speed shown in the viewfinder matches what's been manually set.
It all sounds clumsy and complex but is done far more quickly than I've taken to type this and becomes second nature.
Aperture priority metering is selected on the camera by choosing AUTO on the mode selecter. In this mode the shutter speed ring has no effect and the viewfinder always displays the automatically selected shutter speed.
Yes, on this camera you leave the aperture ring at f22 and use the camera's controls to set your f-stop. It won't work is you change the ring on the lens. You gain the control of the aperture in the 'M' and 'A' modes. The 'P' setting is for the camera to pick both speed and aperture for you. 'S' is shutter priority, etc
s I understand it from what I have seen on the Web, the 3000Z can operate in several modes:
1. Fully automatic (camera select both
2. Manual (user sets both aperture and shutter speed).
3. Aperture Priority mode - user sets aperture and camera chooses correct shutter speed to get a good exposure
Apparently there is no Shutter Priority mode (user cannot set only the shutter er speed and allow the camera to set the aperature to get a good exposure). This option is available on the Epson 850Z camera and this seems like a silly ommision to make on a "high-end" camera like the 3000Z.