135mm El-Nikkor w/ 50mm threads...uggg (how do I mount this thing?)

[clineco]

So after some research I ended up purchasing an El-Nikkor 135mm 5.6. To my surprise, the threads are much larger than M39. From the little info I found regarding this issue, I see that the lens originally came with an adapter to fit the 39mm threads. I've been unable to locate a replacement (any ideas?), so I'm thinking about purchasing a new lens board for my Omega d5500 which currently has a 3 lens turret.

So here's my question. If I purchase this lens board:
Lens Board

Can I mount one of these on there?
Lens Plate

Or do I need to purchase one of these?
Lens Plate

Obviously I'd like to get this done as cheaply as possible, I can pick up the first 2 items for under $50. Ideally, i could just find that old Nikkor adapter ring and call it a day, but I have no idea where to pick one up.

Any ideas?

[Kevin Crisp]

If there is enough meat on the board (there is on Beseler boards, don't know about yours) have a machinist cut a hole and thread it. I know a retired machinist who is inexpensive if you need a reference. If you go this route be sure he/she understands the importance of the final orientation for seeing the stops.

[clineco]

@Kevin

Thanks I'll keep that in mind. Thank you.

[ic-racer]

I have two D5500 and I use the #421-933 to mount my 150mm lens to the turret. I have the other one set up to use the individual plates. It is not hard to change out between the individual plates and the turret. Just 4 thumbscrews so both ways will work well.

[clineco]

I have two D5500 and I use the #421-933 to mount my 150mm lens to the turret. I have the other one set up to use the individual plates. It is not hard to change out between the individual plates and the turret. Just 4 thumbscrews so both ways will work well.

Is this the turret you own?

[mijosc]

If you want to mount right to the flat lens board (not the turret), you will need Omega part #: 421-903. The Omega D5 and D6 compatible lens mounts will not mount on the D5500 flat lens board, only to the D5500 turret.

Also you will need a retaining ring if you don't already have one.

http://store.khbphotografix.com/Omeg...-421-9051.html
http://store.khbphotografix.com/50mm...Lock-Ring.html

[mijosc]

Sorry, I didn't see that you already have a turret for your D5500. In that case 421-933 should mount to it fine.
http://store.khbphotografix.com/Omeg...mm-Thread.html

You can also check out the D5500 lens mount guide from KHB here:
http://www.khbphotografix.com/omega/LensMountD5500.htm

[AtlantaTerry]

So after some research I ended up purchasing an El-Nikkor 135mm 5.6. To my surprise, the threads are much larger than M39. From the little info I found regarding this issue, I see that the lens originally came with an adapter to fit the 39mm threads. I've been unable to locate a replacement (any ideas?), so I'm thinking about purchasing a new lens board for my Omega d5500 which currently has a 3 lens turret.

So here's my question. If I purchase this lens board:
Lens Board

Can I mount one of these on there?
Lens Plate

Or do I need to purchase one of these?
Lens Plate

Obviously I'd like to get this done as cheaply as possible, I can pick up the first 2 items for under $50. Ideally, i could just find that old Nikkor adapter ring and call it a day, but I have no idea where to pick one up.

Any ideas?

What about a Step Down Ring? Would one work?

[ic-racer]

What about a Step Down Ring? Would one work?

Not sure how anything 50mm across would ever fit in a 39mm hole

[AtlantaTerry]

Not sure how anything 50mm across would ever fit in a 39mm hole

LOL! Yeah after I posted that I got to thinking about it.