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How to set f stop on lens - Cameras

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That depends on the lens. Would you care to specify?
Many lenses have an aperture ring. Usually this is the ring closest to the mount. Turn the ring one way to open up the aperture, turn it the other way to close it down. The direction depends on the make of the lens.
Other lenses do not have aperture rings. With such lenses, you have to control the aperture from the camera body, usually by turning a dial.
Sorry about the vague answers. If you need more specific details, please reply to this post and give details as to the make and model of the lens and the camera.

Posted on Feb 07, 2012

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What is the L switch for ?


That is the ZOOM LOCK SWITCH
This stops the zoom extending when you carry the lens.
Set it at 24 mm setting to stop the lens barrels from rotating and extending.
Unset it to free the lens again.

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Can't change f stop on nikon d5100


Confused. The f stop is changed on the lens unless some auto setting is used. Does camera work with other lens? If so, lens needs to go to a lens shop for repair.

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What's the aperture in a 3G mobile lens?


The aperture of a lens system is the opening between the actual lens elements, typically made of glass or plastic, and the camera's digital sensor that translates the light into image data. Aperture openings are referred to in terms of stops or f-stops that equate to the ratio of the lens focal length to the diameter of the opening. A lens system with a focal length of 50mm and an aperture opening that is 25mm in diameter would equate to an f-stop of 2, and would be known as a 50mm f2 lens. Some lenses have variable apertures that can be set to one of multiple f-stop values. Reducing the aperture size decreases the amount of light that makes it to the sensor as well as increases the amount of depth of field that the lens will provide.

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I set this "Nikon 105mm f/2.8G ED-IF AF-S VR Micro-Nikkor Lens" or tried to set it to F2.8 in full manual mode. the F-Stop wandered from F2.8 to F3 / F4.5 depending on where i pointed the lens. I...


You have described Aperture priority mode: you set the f/stop and the shutter speed changes to make the exposure correct.

Full manual mode requires you to set both the shutter speed and the f/stop. You are seeing the recommended f/stop for the shutter speed you have selected.

Sep 25, 2010 | Nikon 105mm f/2.8G ED-IF AF-S VR...

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Took pictures of footbal scrimage during the middle of the day, half of pictures were over exposed, what settings should i have on my nikon d300?


Hi,

Go to www.nikon.co.uk and go to the Customer Service tab and then Downloads and type in Sports Settings.

This will give you all the settings you should set your camera too.

A quick fix is to set your iso setting to Auto and this will adjust your exposure.

Hope that this helps

Thanks

Gary

Aug 15, 2009 | Nikon 70-200mm f/2.8D VR G-AFS ED-IF Lens

1 Answer

M42 adaptor


Quite right too. When the M42 adaptor is fitted there is absolutely no exchange of information between the lens and the body: M42 lenses pre-date all of those later developments. Your camera will also be unable to stop down the lens automatically when taking the picture, most M42 lenses don't even stop down automatically when connected to an M42 body.

You need to do things the old-fashioned way. Your camera needs to be set to meter manually, shutter priority mode may also be used. In manual mode you focus the lens as normal with the aperture ring set to the lowest aperture number (i.e.aperture is wide open).
You then make sure that the lens in in manual mode as well and stop down to whatever you want, if the image remains bright enough then you can adjust the precise focus using the hyperfocal principle if you like which takes advantage of the increased depth of field of a stopped down lens.
In manual mode, you then tell the camera what aperture you have set (read it from the lens barrel) and set the shutter speed using the camera's light meter to guide you. If using shutter priority mode then the camera will choose the shutter speed for you.
Check everything is set as you intend and press the shutter.

It all sounds long winded but is exactly how many of the world's greatest photos were taken and soon becomes second nature. You also learn far more about the relationship between aperture, shutter speed and ISO settings and will be able to talk about reciprocity like you know about it!

Jun 26, 2009 | Konica Minolta Maxxum 7D / Dynax 7D...

1 Answer

Camera simply quits working.Have tried taking battery out and back which sometimes works.


Since your camera sometimes work, it could be the lens f/stop setting or the contacts between the lens and the body. First, clean the contacts on lens and the body with tip of pencil eraser. clean them again with denatured alchohol. Second, make sure the lens f/stop is at f/22 or highest setting and lock. Try again. If you still have problem, you should take it to a local camera retailer and see if they can resolve the situation before taking it to repair shop. -James

Apr 12, 2009 | Nikon D40 Digital Camera with G-II 18-55mm...

1 Answer

Tamron 90mm 2.5 adaptall man focus lens


You probably have to set the aperture manually on the lens, because it might not have CPU contacts. I think changing the aperture on the camera will probably have no effect, so just try twisting the aperture ring to wide open.

You usually have to set the aperture at the minimum setting (highest number) so that if the camera is choosing the aperture, it can stop down to the required value.

No good having it set at f2.8 if the shot needs f11.

If the lens is very old, it might have a manual iris that you have to set yourself on the lens. The lenses that stop down automatically will have a tiny peg on the mount that a suitable camera can operate. Gentle pushing of this peg while looking through the lens will tell if it is stopping down - set it wide open first.

If you have a depth of field preview button, this will also have the same effect with the lens on the camera if the body matches up with the lens.

Jan 17, 2009 | Tamron Macro 90mm f/2.5 Manual Focus...

1 Answer

Nikon FM10 shutter wont deploy with lens on.


Check the lens. Does the diaphragm move freely when you move the f/stops? Put the lens on f/8 or f/16 and push the pin in, it should move freely and close to the f/stop you set. If not the blades may have oil on them. Also if it is free then set the lens to the smallest aperture and if there is a button push it in to lock for auto aperture set.

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Will a lenses without the A setting on the apeture ring work on a DS


They will - fully open in Av mode, and with any aperture in manual mode - after you allow the Ds through the custom settings menu to use aperture settings different then "A". To choose correct exposure with such a lens in manual mode you can use the AE-button - it stops down the aperture, reads the EV and sets the shutter speed according to the chosen aperture.

Sep 08, 2005 | Pentax *ist DS Digital Camera

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