Kodak Portrait Lens 305mm (12in.) f/4.8, questions

[buggz]

Questions:
- Did Kodak actually manufacture their own glass?
- How do you know that the glass you have is correct?

On the front of mine is a "small wall clock" sized shutter.
Showing:
NO. 5 UNIVERSAL SYNCHRO SHUTTER
MADE IN U.SA. BY ILEX OPTICAL CO. FOR
EASTMAN KODAK COMPANY, ROCHESTER, N.Y.

There a "ring/hood" attached to the front of the shutter, showing:
Kodak Portrait Lens 305mm (12in.) f/4.8 R0171, then an encircled capital L
This "ring/hood" is easily unscrewed.
On top of the "ring/hood" is a plain, polished? aluminum? cap that fits with a felt liner.
- The R0171 is the serial number ?
- If so, is there a document that would tell me the date?

On the rear is the lens, there are no ID marks found on mine.
The entire lens screws off the shutter.
However, the individual lens/group, does not seem to be able to be removed.
I see nothing along the edges of the lens for ID, etc.
- How do I really know this the correct glass ?

[cowanw]

1.You should be hugely reassured that it actully does screw into the shutter.
2. Take a picture; that should be reassuring.

[dsphotog]

Your lens was made in 1956. The secret Kodak date code word is "camerosity".
I'm not sure, but I think the front ring also holds series size filters.

[UNITER]

Your lens was made in 1956. The secret Kodak date code word is "camerosity".
I'm not sure, but I think the front ring also holds series size filters.

Can you give me the year of manufacture of the lens Kodak Portrait Lens 305mm (12in) f/4.8 RE325 L S

[Louis Pacilla]

I can't imagine you haven't seen the manual for the 305mm f4.8 kodak Portrait Lens in Universal shutter on Camera Eccentric site.

I'll post the link just in case.

http://www.cameraeccentric.com/html/info/kodak_1.html

[eddie]

How do I really know this the correct glass ?

you got a fake. send it to me , i will use it!

[buggz]

Nice try.
Though seriously, I'm seeing there is no way to correctly ID the glass.

you got a fake. send it to me , i will use it!

[cowanw]

Check flashlight reflections, from the back three, small, medium and large all move together.
from the front the medium and large move in opposite directions from the central small.
If this is demonstrated, you know you have a achromatic meniscus that fits your shutter.
How many achromatic meniscus non Kodak portrait cells from other lenses will just happen to fit your shutter ( diameter, thread pitch, male/female)?
You are right however, you will never know whether someone has switched this Kodak portrait lens into this shutter from another, otherwise identical, lens.

[buggz]

Being a newbie, I just didn't know if this was an easy to fake item, or not.
I thank you and everyone else for their information and patience with my newbie questions.

Check flashlight reflections, from the back three, small, medium and large all move together.
from the front the medium and large move in opposite directions from the central small.
If this is demonstrated, you know you have a achromatic meniscus that fits your shutter.
How many achromatic meniscus non Kodak portrait cells from other lenses will just happen to fit your shutter ( diameter, thread pitch, male/female)?
You are right however, you will never know whether someone has switched this Kodak portrait lens into this shutter from another, otherwise identical, lens.

[eddie]

The chance that you have a "fake" lens group/barrel is highly unlikely.

wrong! it is a fake!

I agree that it is unlikely the lens was switched. .

not unlikely! a fake!

Being a newbie, I just didn't know if this was an easy to fake item,

do not listen to them! those two guys above (especially Louis) do not know nuthin' 'bout lenses!

it is easily faked. you got a fake!. send it to me....i will even pay priority shipping.....k?

har har har!