NikonGear'23

Gear Talk => Lens Talk => Topic started by: Zang on March 07, 2020, 14:59:30

Title: Nikon 85mm f2 AI vs Nikon 85mm f2 AI - Lens repair
Post by: Zang on March 07, 2020, 14:59:30

Hello NikonGearers,

I plan to take apart my 85mm f2 so I took a look at Richard's instruction. The lens seems to be fairly simple to work with. When looking at mine, even though it is AI version, it has 5 rear mount screws instead of 3! Does anyone know what the difference between 3-screw and 5-screw versions of this lens is?

Cheers,
Zang

Title: Re: Nikon 85mm f2 AI vs Nikon 85mm f2 AI - Lens repair
Post by: Birna Rørslett on March 07, 2020, 19:55:47

My copy is AI and has 3 bayonet screws.

According to Roland's legendary Nikon pages, the early 85 f/2 had 5 screws, the later AI and AIS had 3.

Title: Re: Nikon 85mm f2 AI vs Nikon 85mm f2 AI - Lens repair
Post by: Zang on March 07, 2020, 23:57:09

Do you know the difference in the internal construction?

Title: Re: Nikon 85mm f2 AI vs Nikon 85mm f2 AI - Lens repair
Post by: Birna Rørslett on March 08, 2020, 00:30:19

Nope, but I wouldn't expect large variations as the AI range covers both 3 and 5 screws.

Title: Re: Nikon 85mm f2 AI vs Nikon 85mm f2 AI - Lens repair
Post by: Zang on March 08, 2020, 22:29:59

Thanks,

I started working on it. The rear screws are as stubborn as all those 60's lenses! I'll leave it with penetrating oil on it for some time.

Cheers,
Zang

Title: Re: Nikon 85mm f2 AI vs Nikon 85mm f2 AI - Lens repair
Post by: Zang on March 15, 2020, 16:18:26

I am done with overhauling this one! I can confirm that other than having more bayonet screw, the lens has the same construction like the 3-screw version.

Cheers,
Zang