using non CPU lens on D7100: I have a Nikon D7100. I have a non CPU lens that I want to use. I know that I will be using manual focus and manual settings shutter speed and aperture. I...

JMCPHD Loc: Maine

I have a Nikon D7100. I have a non CPU lens that I want to use. I know that I will be using manual focus and manual settings shutter speed and aperture. I also know that I can put in information about the lens and identify it. If I do that, do I need to do anything else to shoot with the lens?

RWR Loc: La Mesa, CA

JMCPHD wrote:

I have a Nikon D7100. I have a non CPU lens that I want to use. I know that I will be using manual focus and manual settings shutter speed and aperture. I also know that I can put in information about the lens and identify it. If I do that, do I need to do anything else to shoot with the lens?

What does your user’s manual say about the use of non CPU lenses? (See “Compatible Lenses”)

LoneRangeFinder Loc: Left field

JMCPHD wrote:

I have a Nikon D7100. I have a non CPU lens that I want to use. I know that I will be using manual focus and manual settings shutter speed and aperture. I also know that I can put in information about the lens and identify it. If I do that, do I need to do anything else to shoot with the lens?

It would really help to know the specific lens you would like to use.

rmalarz Loc: Tempe, Arizona

I have several non-CPU lenses that I regularly use with my D700 and D800e. You outlined exactly what you need to do. The biggest challenge is remembering to change the camera selection as to which lens you are placing on the camera.

Additionally, some of the lenses I use require the use of the f-stop ring on the lens to change aperture, others will allow me to use the f-stop setting dial on the camera.

Just make sure your lens is physically compatible with your camera. I have a couple that I can't use due to the fact that they will physically damage the contacts within the camera body.
--Bob

JMCPHD wrote:

I have a Nikon D7100. I have a non CPU lens that I want to use. I know that I will be using manual focus and manual settings shutter speed and aperture. I also know that I can put in information about the lens and identify it. If I do that, do I need to do anything else to shoot with the lens?

NCMtnMan Loc: N. Fork New River, Ashe Co., NC

Would recommend that you go to Nikon's website and check their list of compatible lenses before trying to use it.

JMCPHD Loc: Maine

RWR wrote:

What does your user’s manual say about the use of non CPU lenses? (See “Compatible Lenses”)

The manual does explain how to put in the information on up to 9 non CPU lenses and a mechanism to set a control to identify which lens is in use. I think I have done that. I don't yet have the lens in hand but will soon. I am unsure if there is anything else I need to do.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

As long as it's an AI or AiS mount lens and not a Pre-AI everything should be fine. If you have more than one lens entered into the Non-CPU lens field in the menu, just be sure the lens in use is the selected one. You can only shoot either in Manual or Aperture Priority modes and still get metering, other modes will not work. I have a D7100 that I use for macro shooting with an older MF 105mm macro lens. I have lots of older MF lenses. If you have any other questions, I'd be glad to help you out. The problem with unmodified Non-AI mount lenses (made before 1977) is that the lens can physically damage the aperture follower on the camera (bending or breaking it) as well as possibly damaging the electrical contacts.

JMCPHD Loc: Maine

LoneRangeFinder wrote:

It would really help to know the specific lens you would like to use.

I am getting a Vivitar fish eye lens that has a Nikon mount and is new.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

Not enough info, no focal length, max aperture, etc. Got an image of the mount?... If it's a new manual focus lens, there should be no problem except that there may not be a focal length listed in the menu. If so, choose the closest one to it.

JMCPHD wrote:

I am getting a Vivitar fish eye lens that has a Nikon mount and is new.

JMCPHD Loc: Maine

Focal length 8mm f3.5 manual focus described as compatible with D7100 and other Nikon models. But I don’t have an image of the mount, sold thru Amazon

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

There won't be any issues. The focal length and the F stop are both listed in the Non-CPU menu as well. Fish eye lenses tend to be special use optics. Likely made by Samyang and branded with the Vivitar name.

JMCPHD wrote:

Focal length 8mm f3.5 manual focus described as compatible with D7100 and other Nikon models. But I don’t have an image of the mount, sold thru Amazon

NCMtnMan Loc: N. Fork New River, Ashe Co., NC

I would not count on the info at Amazon being correct. I have seen descriptions that I knew were wrong many times. Some of the sellers will post anything to try to sell an item. Get the model of the lens, Google info about it and check with Nikon on their website or with their tech support. As noted in another response to you inquiry, using a non-compatible lens can cause serious damage to you camera.

RWR Loc: La Mesa, CA

JMCPHD wrote:

Focal length 8mm f3.5 manual focus described as compatible with D7100 and other Nikon models. But I don’t have an image of the mount, sold thru Amazon

The lens is fixed at f/3.5, no aperture control linkage. Set it up the same as for a Reflex NIKKOR.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

You might want to look at the Amazon listing below. It does have an adjustable aperture...
https://www.amazon.com/Vivitar-Ultra-Wide-Fisheye-Nikon-D3000/dp/B01INWKWL8/ref=pd_sbs_421_3?_encoding=UTF8&pd_rd_i=B01INWKWL8&pd_rd_r=C4MC480M3SWM5GS4CGJX&pd_rd_w=yGMoR&pd_rd_wg=KaV3Z&psc=1&refRID=C4MC480M3SWM5GS4CGJX

RWR wrote:

The lens is fixed at f/3.5, no aperture control linkage. Set it up the same as for a Reflex NIKKOR.

mwsilvers Loc: Central New Jersey

rmalarz wrote:

I have several non-CPU lenses that I regularly use... (show quote)

Just to educate me as I am not a Nikon shooter, what is a non-CPU lens?