Question about Pentax Optio S50 Digital Camera

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Shutter speed and aperture

Is it really true that I can't adjust shutter speed or aperture? Does the camera, in every situation, set both of these automatically?

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You can change the settings when you are not using the smiley face setting. Turn camera on press menu go to sensitivity to change film speed, EV compensation to allow more or less light.

Posted on Apr 21, 2008


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Bought cheap extention tubes, now camera wont recognize the lens. How do I use them

Set the exposure mode to "M" (Manual). You'll have to set both the aperture and shutter speed yourself.

You'll also get no exposure assistance from the camera's light meter. You can review the picture after taking one and/or use the histogram to tune the exposure.

Sep 30, 2013 | Nikon D5000 Digital Camera

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The S and M modes on the black images when taking a pic; any idea why?

I'd say you're severely underexposing. The M mode is for manual exposure. This means you're responsible for setting the appropriate shutter speed and aperture. The aperture controls how much light passes through the lens, the shutter speed controls how long that light hits the sensor. The two of them have to be adjusted properly to suit the amount of light hitting the subject. If the lens doesn't admit enough light and/or the shutter is opened for too short an amount of time, not enough light gets to the sensor and you get a black image.

The S mode is for shutter priority. This lets you set the shutter speed and the camera automatically adjusts the lens aperture for correct exposure. However, the lens has a maximum aperture beyond which it cannot open. If the shutter speed is too fast, again not enough light gets through the lens and you get a black image.

Since you didn't specify the model of your Nikon camera, I can't tell you exactly how to adjust the shutter speed and aperture. If you can't find the procedure in your manual, please feel free to reply to this post, specifying the model.

Feb 24, 2011 | Nikon Cameras

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I'm having problems with the settings on my Canon EOS 400D. When I take pictures in AV mode I can get quality pictures but in TV or M modes the pictures always come out so dark even when taking them...

You need to understand the relationship and teractivity of aperture, shutter speed and iso. In Av mod, you choose the aperture and the camera makes thw shutter speed agjustment, In Tv mode, you set the shutter speed and the camera makes the aperture adjustment, In manual, you have to set both shutter speed and aperture manually. If the ISO mode is set to AUTO, the camera chooses the sensors sensitivity to light automatically. Change to specific ISO
(200-400 for daylight and 799-1600 for night). Take a picture in AV mode and note what shutter speed the camera chose. Then switch to TC mode choose the same shutter speed and see if camera chose the same aperture(f-stop) you chose in first shot. Change to Manual and choose same f-stop and shutter speed the camera chose for you in the other modes. Compare all three photos. They should be almost if not exactly the same exposure wise.
In Tv mode choose a dlowers shutter speed, In Manual choose a combo of slower shuuter and wider f-stop(smaller number). Read your manual.

Jan 02, 2011 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

How do I change the shutter speed on a Nikon EM film SLR

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

Jun 29, 2010 | Nikon EM 35mm SLR Camera

1 Answer

How do I change the shutter speed on the Fuji S8000fd

Set the camera to Shutter Priority AE by turning the mode dial to S. Press the +/- button to open the setting screen, then press up/down to select the shutter speed.

You control the shutter speed the same way in Manual mode. You also select different shutter speed/aperture combinations the same way in Program mode.

You can indirectly control the shutter speed in Aperture Priority AE by changing the aperture and letting the camera set the appropriate shutter speed.

May 27, 2010 | Fuji FinePix S8000fd Digital Camera

1 Answer

How do you change the shutter speed on the finepix s5500?

That depends on the selected shooting mode.

In Program AE, press the exposure compensation button and then up/down on the 4-way button to change the shutter speed/aperture combination.

In Aperture Priority AE you can control the shutter speed indirectly. Press the exposure compensation button and then up/down on the 4-way button to change the aperture, and the camera will adjust the shutter speed to suit.

In Shutter Priority AE press the exposure compensation button and then up/down on the 4-way button to change the shutter speed. The camera will adjust the aperture to suit.

In Manual press the exposure compensation button and then up/down on the 4-way button to change the shutter speed. You'll have to press left/right on the 4-way button to select the appropriate aperture.

Mar 08, 2010 | Fuji FinePix S5500 Digital Camera

1 Answer

How to KNOW the light is right 4 an Olympus OM20 Manual camera?

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.

May 09, 2009 | Olympus OM-2000 35mm SLR Camera

1 Answer

F-stop issues

See pages 36&37 of the manual.

If you haven't got one, you can download it here.

In M mode...

Turn the selector dial to adjust shutter speed.

Hold down the AV+/- button (top-right of rear screen) and turn selector dial to adjust aperture setting.

As for Av mode, this is perfectly normal that you cannot set the shutter speed. Av mode means that you decide on the aperture setting and the camera (not you!) decides on the correct shutter speed.

Hope this helps,


Mar 21, 2008 | Canon EOS Rebel T2 with 28-90 lens 35mm...

1 Answer

Aperture Priority Mode - an undocumented feature

In addition to the "quirks" of the Landscape and Aperture Priority Modes (neither mode works as documented!)..... The camera also behaves differently in full Manual Mode (it changes the settings, whether you want it to or not to compensate for available light)... At lower Zoom Levels, the camera will adjust the Shutter Speed Only, to try and compensate for available light... For example: with the Camera preset to F5.6 Aperture, and 1/48 sec. shutter speed, the camera will adjust the shutter speed between a range of 1/30 to 1/291 sec, to try and "auto expose" the shot for lower or higher light levels, even though you're in manual mode. At an Aperture Setting of 2.8 and 1/48 of a second, the number of internal steps in shutter speed the camera is willing to take, increases dramatially - for example: shutter speeds up to 1/600 of a second, even though you have the shutter set to 1/48 in manual mode. The camera WILL NOT attempt to adjust the Aperture to compensate for proper exposure in available light (OR WILL IT??).... It depends on your Zoom settings! It won't if your're near to full wide angle, but IT WILL if you are using the Zoom. Once you cross some unknown zoom threshold (it doesn't have to be at full zoom), then the camera begins to change both the Aperture and Shutter speed to compensate for available light, even though you are in "Full Manual", versus Auto Exposure Mode. In Manual Mode, (as in Aperture Priority Mode), the amount of change the camera is willing to make to your settings, appears to be related to a preset number of internal steps, with the number of steps dependent on both Aperture and Zoom Settings, before it gives an EV Warning for Over or Under Exposure conditions.... The type (shutter speed only for wide angle, shutter and aperture for zoom) and amount (number of internal "steps" it takes to increase/decrease shutter speed and increase or decrease aperture), is dependent on the amount of zoom you are using for the current shot.

Sep 13, 2005 | Epson PhotoPC 3000Z Digital Camera

2 Answers

Shutter priority mode?

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.

Sep 13, 2005 | Epson PhotoPC 3000Z Digital Camera

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