Aperture?

4 years 4 months ago #669435 by James-Germana
I'm really hoping someone can answer this question as I have not been able to find the answer anywhere. I am using the Nikon D 3300 and the lens I'm using has an aperture of 3.5 to 5.6. I can digitally adjust the F stop through my menus but that's clearly not actually adjusting the aperture of the lens yet it will let me set values from 3.5 all the way to 29. Anybody know what this setting actually does aside from changing the shutter speed?

Thanks!
James


,
4 years 4 months ago - 4 years 4 months ago #669448 by Ozzie_Traveller
G'day James

Your Q tells me that you are new to the 'game' and thus need to start a long and serious investigation into how your beaut Nikon actually works. There are many sources of information, Dr Google being one of them

However to start the ball rolling may I offer you 2 or 3 bits of very basic information

a) the "aperture" is a hole inside the lens that lets light through onto the sensor or film. The diameter of that hole can be altered by you
b) the numbers are the bottom part of a fraction of the focal length of the lens in millimetres. Thus an aperture of 1/8 is shown as 8 and to show that it is not a timed number, it has the letter F inserted before it, therefore it shows as F8
c) you are using a zoom lens that telescopes / grows slightly longer as it moves. In doing so the aperture fraction varies slightly. As you zoom from 18mm to 30mm to 55mm the fraction equvalent to the maximum opening diameter varies from 1/3,5 down to 1/5,6. The smallest aperture opening of 1/22 when the lens is at 18mm of zoom changes slightly to 1/29 when the lens has zoomed to 55mm.

Hope this helps
Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/

Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/

,
4 years 4 months ago #669479 by garyrhook
Your question is unclear.

Why do you think changing the aperture value (via the thumb wheel on the camera) has no affect? Did you take photos using different values, but without zooming?

Nikon lenses stay fully open all the time, until you press the shutter. Only then do they stop down to the value set, and then snap back open. This allows the auto-focus system to have as much light as possible up to the shutter release moment.

So, looking through the viewfinder (the lens: TTL) you won't see any change by changing the aperture setting. Old lenses had an aperture ring, whereby you could twist it and see the change TTL. But not with current Nikon lenses.

Also, it sounds as if you're shooting in Aperture priority mode. In this mode, you select the aperture, and the camera decides the shutter speed, based on metering. Again, everything measured wide open, and the camera decides what to do at shutter release time.


Photo Comments
,
4 years 4 months ago #669585 by Ozzie_Traveller
G'day James

To follow on from Gary ... your beaut new Nikon - as with Canons, Sonys, Pentaxes and others - all enjoy heaps of built-in electronics to make it easier & better for you to take good photos and enjoy yourself at the same time. However the electronics hides the mechanical operations until you press the button and you hear the responding 'clunk' as everything does its stuff and takes the actual photo

To help answer your very basic Qs, I suggest that you visit a camera museum / trash 'n treasure stall / second hand dealer and ask these questions, and so be shown how the "old" cameras worked mechanically. See how the aperture ring actually opens and closes as you alter the numbers on the lens ... see how the focal plane shutter opens and closes ... how the mirror pops up and back down again as the exposure takes place ~ I feel that once you have seen it in operation more stuff will fall into place and you can get on with the actual photo-taking process with a better understanding of what is happening at all times

Equally if the above is not an option - try YouTube for some videos from other well meaning people, you never know what you'll find :)

Hope this helps
Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/

Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/

,
4 years 4 months ago #669587 by shelland
James, 

There has been some great insight provided already. 

The question I have is, what are you looking at to make you say "I can digitally adjust the F stop through my menus but that's clearly not actually adjusting the aperture of the lens yet it will let me set values from 3.5 all the way to 29". 

1. What mode are you shooting in? Aperture priority, shutter priority, etc? In other words, what is the dial at the top set to? This could have an affect on what you're seeing. 
2. What do you see making you think the aperture is not being adjusted? Provide as much detail as you can - your settings, what you're seeing on the screen, what actions you are taking - buttons you are pushing, dials you are turning (including lens), etc. 

With that information provided, hopefully we can make sure your specific question/concern is being answered. 

Scott

Scott

- Twin Cities, MN

,
4 years 4 months ago #669707 by James-Germana
I ended up figuring out the answer after thinking more about my question. I didn't realize that the lense only specifies the lowest aperture at each zoom and not the entire range :) Sorry for the confusion...


,
4 years 4 months ago #669710 by garyrhook

James-Germana wrote: I ended up figuring out the answer after thinking more about my question. I didn't realize that the lense only specifies the lowest aperture at each zoom and not the entire range :) Sorry for the confusion...


Well, I wondered about that possiblity. The nomenclature is a but unclear, yes. The first number of the range applies to the shortest focal length, which gradually increases to the second number, which applies to the longest focal length. These are the minimum aperture values possible for the lens, scaled along the entire range of the zoom.


Photo Comments
,
4 years 4 months ago #669714 by James-Germana
I also didn't realize the Nikon only stops down when the shutter is triggered so that also seemed suspicious to me...


,
4 years 4 months ago #669850 by shelland
Just to make sure you're aware, there are lenses available that will keep the same aperture as you zoom (f/2.8 for example). If that's important to your work, it is an option. Those lenses tend to be more expensive than their counterparts that change the aperture value as you zoom. 

Scott

- Twin Cities, MN

,

817.3K

241K

  • Facebook

    817,251 / Likes

  • Twitter

    241,000 / Followers

  • Google+

    1,620,816 / Followers

Latest Reviews

The Canon EOS R100 is an entry-level mirrorless camera introduced in 2023. But just because it’s an entry-level camera doesn’t mean it’s a bare-bones camera. Find out why in this review!

Apr 22, 2024

Nikon’s retro-looking Nikon Zfc is anything but retro. Under its classic body is a host of features and amenities that make it a worthwhile compact mirrorless camera for 2024.

Apr 15, 2024

The Canon EOS R50 is one of the newest R-system cameras from Canon. Is it worth your money? Find out all the details you need to know in this comprehensive review.

Apr 10, 2024

The Sony FE 70-200mm f/2.8 GM OSS II is Sony’s flagship mirrorless zoom lens. As such, it’s loaded with features and has a top-shelf build quality that makes it a top pick!

Mar 27, 2024

Forum Top Posters

Latest Articles

The Insta360 has one of the best lineups of action cams and 360-degree cameras. With these Insta360 accessories, you can elevate your photography and videography game!

Apr 24, 2024

Creating impactful photos of landscapes depends on many factors, not the least of which is your talent behind the lens. This guide explores other elements required for the best product.

Apr 23, 2024

The Canon EOS R100 is an entry-level mirrorless camera introduced in 2023. But just because it’s an entry-level camera doesn’t mean it’s a bare-bones camera. Find out why in this review!

Apr 22, 2024

Are you ready to upgrade your camera? Before buying new, you might consider the value of purchasing used gear to save money.

Apr 18, 2024

The Olympus OM-D E-M10 Mark IV is a micro four thirds camera released in 2020. It’s an entry-level system along with the OM-D E-M5 Mark III. Use this guide to determine which one is best for you!

Apr 17, 2024

Blue hour photography might not be as well known as golden hour photography, but it is every bit as good a time to create epic images of landscapes. Learn how in this quick tutorial!

Apr 17, 2024

Nikon’s retro-looking Nikon Zfc is anything but retro. Under its classic body is a host of features and amenities that make it a worthwhile compact mirrorless camera for 2024.

Apr 15, 2024

Moving from taking snapshots of your dog to creating beautiful images doesn’t have to be that difficult! Use the tips outlined in this dog photography guide, and you’ll get better results in no time.

Apr 15, 2024