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cyhusk

US
7 posts

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cyhusk Registered since 02nd Feb 2013
Sat 02-Feb-13 10:37 PM

I have a 50mm f/1.8 manual prime that i mount to my D5100. My question is, how far do I rotate the lens to get it to mount? The kit lens rotates until it clicks, but when i rotate the prime, it seems to stop before that. I don't want to force it any farther, for fear of breaking something! Please give me any help you can offer.

Leonard62

Hatboro, Pa, US
4035 posts

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#1. "RE: Mounting AIS lens on D5100" | In response to Reply # 0

Leonard62 Gold Member Awarded for excellent contributions and sharing his in-depth knowledge and experience with the community, especially of Nikkor Lenses Writer Ribbon awarded for his contributions to the Nikonians Resources articles library Nikonian since 15th Mar 2009
Sun 03-Feb-13 12:46 AM | edited Sun 03-Feb-13 12:53 AM by Leonard62

When you mount the AIS 50mm f1.8 to the D5100, the lens aperture dot should fall directly under the K in Nikon on the front of the viewfinder housing. It doesn't matter what the aperture is set to, the dot is under the K when it clicks in.

Just make sure the aperture lever on the back of the lens springs back nicely when the lens is set to f22 so while looking at the blades they open to wide open from the nearly closed position when you press it with your finger. Also look for any damage to the mount.

Len

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cyhusk

US
7 posts

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#2. "RE: Mounting AIS lens on D5100" | In response to Reply # 1

cyhusk Registered since 02nd Feb 2013
Sun 03-Feb-13 01:10 AM

Thanks Leonard! Mount looks good, but it seems very tight when it gets to the "N". I afraid to rotate it that far. I'll take a closer look at the mount.

Leonard62

Hatboro, Pa, US
4035 posts

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#3. "RE: Mounting AIS lens on D5100" | In response to Reply # 2

Leonard62 Gold Member Awarded for excellent contributions and sharing his in-depth knowledge and experience with the community, especially of Nikkor Lenses Writer Ribbon awarded for his contributions to the Nikonians Resources articles library Nikonian since 15th Mar 2009
Sun 03-Feb-13 01:46 AM | edited Sun 03-Feb-13 02:02 AM by Leonard62

The dot should not rotate all the way to the "N", only to the "K".

Len

edit: It should look like this when the lens is locked in place and set to f1.8. The black dot is hard to see but it's directly in front of the 1.8

Click on image to view larger version


Len

Attachment #1, (jpg file)

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cyhusk

US
7 posts

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#4. "RE: Mounting AIS lens on D5100" | In response to Reply # 3

cyhusk Registered since 02nd Feb 2013
Sun 03-Feb-13 01:55 AM

I was talking about the first N. Don't I line up the dot on the aperature ring with that of the camera and rotate counter clockwise? If so, I need to rotate past the first N to get to the K.

Leonard62

Hatboro, Pa, US
4035 posts

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#5. "RE: Mounting AIS lens on D5100" | In response to Reply # 4

Leonard62 Gold Member Awarded for excellent contributions and sharing his in-depth knowledge and experience with the community, especially of Nikkor Lenses Writer Ribbon awarded for his contributions to the Nikonians Resources articles library Nikonian since 15th Mar 2009
Mon 04-Feb-13 05:08 PM | edited Mon 04-Feb-13 05:11 PM by Leonard62

Yes that's correct. You actually go past the "n" small N. I don't know why it won't rotate further if everything looks good.

Len

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anymouse73

Philadelphia, US
78 posts

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#6. "RE: Mounting AIS lens on D5100" | In response to Reply # 0

anymouse73 Silver Member Nikonian since 16th Jan 2013
Fri 08-Feb-13 11:05 PM

You may have this figured out by now, but...

I use the f/1.8D lens on a D3100. For mine to work, I must turn the aperture ring to F/22 and lock it in place. Otherwise it feels rough mounting it to the camera.

I'm not sure if the F/1.8 has an aperture ring lock on it or not. If not, just turn the ring to f/22 and leave it there. The camera will then set the aperture, same as a "G" lens.

Good luck,

Bob

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Leonard62

Hatboro, Pa, US
4035 posts

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#7. "RE: Mounting AIS lens on D5100" | In response to Reply # 6

Leonard62 Gold Member Awarded for excellent contributions and sharing his in-depth knowledge and experience with the community, especially of Nikkor Lenses Writer Ribbon awarded for his contributions to the Nikonians Resources articles library Nikonian since 15th Mar 2009
Fri 08-Feb-13 11:18 PM

Manual focus lenses don't have aperture ring locks like the AF-D lenses do. I have no trouble mounting my lenses where ever the aperture is set.

Len

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cyhusk

US
7 posts

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#8. "RE: Mounting AIS lens on D5100" | In response to Reply # 7

cyhusk Registered since 02nd Feb 2013
Sat 09-Feb-13 12:15 AM

Thanks all! I have it figured out!

G