How does the minimum aperture lock lever work?

It is inevitably attached to the body, and the aperture adjustment lever of the body will automatically set the aperture of the lens to the maximum. On the surface, you may see that the aperture you set is different, but if you press the button for the depth preview, you will notice the same. In fact, this is a very advanced technology adopted by Nikon in the late 60s and early 70s of the last century, that is, framing with the maximum aperture, and then the machine automatically shrinks according to the set aperture when shooting.

The reason is very simple, if the aperture is focused on the manual machine, the viewfinder screen will be dark, and it is impossible to distinguish whether the focus is successful, and the same is true for the automatic machine, the aperture is small, and the light entering will be less, which will bring great problems to the work of the focusing module. That's why it's hard to focus on a small-aperture lens in the dark, while a high-aperture prime head is quicker to focus in the dark.

The use of the minimum aperture lock is to tell the body that your machine is now at the minimum aperture. If you change the aperture value on the lens at this time, your machine will generally report an error. The reason for this is that Nikon's machines are bound to shrink from the maximum aperture to the minimum aperture, if you set it to a non-minimum value.

Then the mechanical structure of your machine will not be able to reduce the aperture to a minimum, from the program to the actual aperture conflict.

The minimum aperture lock is only set for Nikon's automatic cameras (both digital and film), and the manual machines (all of which are film machines) are adjusted by the aperture ring of the lens.

The lever is only locked to the aperture ring, there is no electronic structure connected to it and it is not connected to other machinery, and the aperture ring cannot be moved after locking.

It actually works with a rod on the side of the mount of the fuselage, and when the lens is screwed on, the bulge on the lens presses the rod of the fuselage....For details, please refer to the lens manual.

Because older cameras need to adjust the aperture from the lens, they have aperture rings. Modern cameras are adjusted from the body, so this minimum lock is used, and if the aperture setting is not the minimum value, the body will not be able to reach the minimum aperture...So a small rod appears on the body, if you turn the aperture ring, this rod will bounce, and the body display should be set to the minimum aperture.

The aperture release lever of the lens, when the shutter is released, there is a mechanism on the body to release the shutter at the same time...When metering and framing, the aperture is wide open.

When in use, whether the aperture lock switch is locked or not does not affect the parameters, only the aperture is required to be set to the minimum.

1.The minimum aperture lock is used in shutter priority mode, where the aperture is automatically set by body metering and only retracted to the actual set value when shooting.

2.This is a mechanical aperture shrink lever, one of the functions of which is to maintain the maximum aperture to get the maximum luminous flux in the framing state, so that the viewfinder will not shrink to the actual aperture and affect the brightness, such as f16, when the aperture is retracted, the framing picture cannot be seen clearly at all.

3.As mentioned above, it is actually just to lock the aperture on the lens to prevent it from being mismoved, and the actual setting value of the camera body shall prevail.

4. The minimum aperture lock is only partially set with the lens aperture adjustment mechanism, and now most of them are adjusted through the body without the aperture ring, and the aperture is also changed to electromagnetic without the mechanical lever. Information about the aperture is transmitted through the contacts on the bayonet.

Minimum aperture locking has no effect on A stops. The significance is to ensure that the aperture size is fixed when using the manual mode, which is suitable for shooting scenes with shutter priority.

There will be inconsistencies with info.

All cameras can use the aperture lock function of this lens, provided that the manual aperture mode is used.

This lens is used in this way for the current Nikon body.

Put the lens on;

Adjust the aperture on the lens to 22 and aim at the white line;

Pull down the aperture lock lever on the lens and lock it at the minimum aperture;

Okay, now you can adjust the aperture of the lens with the A and M stops on the camera.

It's that simple.

Summary: Nikon's D-type lenses are to be locked to the smallest aperture and then operated. ）

First of all, congratulations on the wisdom of buying the 50mm, which is cheap for the first few hundred dollars but it performs very well.

50mm, to be precise it is a D-head. Just remember that all D-heads have to be the smallest aperture to use!

Why is that? This is because the aperture value set by the current DSLR camera is "transmitted" to the D-type lens through the aperture mechanical lever, while the CPU lens is transmitted to the lens by the camera body through the contact point through the telegraph.

If you don't put it at the smallest aperture, you won't be able to close the small aperture.

To put it bluntly, the aperture is at the minimum, how big it is to be opened by the mechanical rod, and if the card (qia) is large, it cannot be smaller.

Therefore, the aperture of the D-type lens must be locked at the minimum aperture value before it can be connected to the body.

The requirement to lock the aperture is for automatic control, and it has nothing to do with the aperture value required for actual shooting, if you use the manual or aperture priority setting to adjust the aperture, the aperture value when shooting will be correct, and it will not be wrong. You can also verify the EXIF information by **.

The D90 manual dimming aperture is carried out using a command dial rather than by toggling the aperture ring of the lens, which has been made clear upstairs.

The landlord should also take a look at the manual of this lens, which also clearly says that the aperture should be locked.

Because the aperture is adjusted through the body, not through the lens adjustment ring, this is the case with the D-head.

Because the current Nikon DSLR's autofocus function must be implemented at the above time, the camera will automatically close the aperture when you shoot. The original aperture ring was designed to work with older models and manual cameras, and the new lenses have been replaced with the aperture ring, the so-called g-head.

After the D head is locked to the minimum aperture, the camera body adjusts the lens aperture through the aperture lever.

A few people upstairs made it clear enough.

To get the maximum depth of field, you need to use your camera's maximum aperture, and the larger the aperture, the smaller the aperture. For example, if your camera has an aperture value, then it means the maximum aperture of your camera, and f9 is the minimum aperture.

Therefore, when you said above, "The easiest way to get the maximum depth of field is to stop down the aperture and use the smallest aperture on the camera as much as possible", which means that the aperture reduction should be the value of the aperture reduction.

Take a look at something called a "manual".

Enter the brand and model and search the manual by yourself.

Minimum aperture lock switch. The old 50 can adjust the aperture manually, but when used on the body of a fuselage motor, the camera automatically adjusts the aperture value according to the settings, so you have to lock it to the minimum value so that the camera can choose any value between the maximum and the smallest! Align the marker with the F22 lock and you're ready to ......Hope it helps.

Your lens should be a Nikon AF50mm, which is Nikon's second-generation AF lens and also comes with a mechanical aperture adjustment ring. When working with modern cameras (AE machines, with auto**), the aperture ring needs to be adjusted to a minimum and the lens should be used.

You need to adjust your lens to the minimum aperture f22** aperture adjustment ring on the moving lens, located at the rear of the lens), and then lock it with the slider on the aperture ring, and you're good to go.

Is it that the lens contact points are not repeated! Turn it off, get back on the camera, hear a click and try again!!