NikonGear'23

Gear Talk => What the Nerds Do => Topic started by: richardHaw on February 04, 2018, 14:54:50

Title: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: richardHaw on February 04, 2018, 14:54:50

http://richardhaw.com/2018/02/04/repair-nikkor-28mm-f-2-8-ai-s/

by popular request :o :o :o

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: Bent Hjarbo on February 04, 2018, 16:25:00

Nice writeup, thanks  :)

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: John Geerts on February 04, 2018, 17:23:59

Thanks for the article, Richard. 

Nice lens also for night shots.

October 2017 post:

(http://nikongear.net/revival/index.php?action=dlattach;topic=6626.0;attach=29611;image)

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: Jacques Pochoy on February 04, 2018, 18:45:33

Nice article Richard !  I was getting a thrill in seing the inside of my 28mm F/2.8 lens... Happily mine hasn't got all that fungi (yet)!

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: pluton on February 04, 2018, 19:30:35

Thanks Richard, for a fascinating look inside an amazing lens design.  My copy has slight wobble from [I think] loose helicoid key(s);  maybe I'll see if I can tighten the keys. 
One problem I always have:  The slot-type grub screws.  None of my existing screwdriver tips fit them exactly, and if the tip doesn't exactly fit, the screw will likely be destroyed. 
Is there a specific set of slot-type screwdrivers that will fit these old Nikon grub screws without the screwdriver tips having to be re-shaped by filing?

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: Jack Dahlgren on February 04, 2018, 23:17:02

Quote from: pluton on February 04, 2018, 19:30:35

Thanks Richard, for a fascinating look inside an amazing lens design.  My copy has slight wobble from [I think] loose helicoid key(s);  maybe I'll see if I can tighten the keys. 
One problem I always have:  The slot-type grub screws.  None of my existing screwdriver tips fit them exactly, and if the tip doesn't exactly fit, the screw will likely be destroyed. 
Is there a specific set of slot-type screwdrivers that will fit these old Nikon grub screws without the screwdriver tips having to be re-shaped by filing?

Look for JIS (Japanese Industrial Standard) screwdrivers. This is most true for cross head screws, but should be helpful with slot head as well.

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: Øivind Tøien on February 05, 2018, 01:07:12

Thanks Richard, very nice and thorough write up!

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: Chulster on August 28, 2023, 23:03:32

Hi Richard,

I've been unable to remove the front optical unit of this lens. I see the two slots for a lens spanner, but they exist in a space that is far too narrow for my spanner's tips. There is about 1–2mm of space to access these slots. Do you have any advice? Do I need to disassemble the CRC unit in order to be able to remove the front optical unit?

Title: Re: Repair of the Nikkor 28mm f/2.8 Ai-S!
Post by: Erik Lund on August 29, 2023, 08:48:43

Buy smaller tips for your spanner or cut them down so they fit.