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l2oBiN
9-Jan-2019, 17:14
I have received a 450C 12.5 in a copal shutter with max aperture of 6.3? This is obviously a non matching copal shutter. Would the scale still be relevant or it it incorrect and useless? https://uploads.tapatalk-cdn.com/20190110/e3ffe85f0d9c7fecb52e3a88f167aaca.jpg

angusparker
9-Jan-2019, 17:16
I have received a 450C 12.5 in a copal shutter with max aperture of 6.3? This is obviously a non matching copal shutter. Would the scale still be relevant or it it incorrect and useless? https://uploads.tapatalk-cdn.com/20190110/e3ffe85f0d9c7fecb52e3a88f167aaca.jpg

Useless. Max aperture is 12.5 which would correspond to 6.3 on your scale. SK Grimes can make you a new aperture scale if you sent it to them.

Duolab123
9-Jan-2019, 17:24
I have received a 450C 12.5 in a copal shutter with max aperture of 6.3? This is obviously a non matching copal shutter. Would the scale still be relevant or it it incorrect and useless? https://uploads.tapatalk-cdn.com/20190110/e3ffe85f0d9c7fecb52e3a88f167aaca.jpg

You would need to either get the proper scale or calibrate it yourself. 1 f stop equals one shutter half or double. If you had a densitometer and time you could figure it out.
If you want it right, send it to SK Grimes or another expert.

Duolab123
9-Jan-2019, 17:30
I looked at other examples on ebay. The scales are numbered by copal. Your's says 49, the proper scale number is 64 .Look at these on ebay. Looks like a very valuable lens.

angusparker
9-Jan-2019, 17:35
I looked at other examples on ebay. The scales are numbered by copal. Your's says 49, the proper scale number is 64 .Look at these on ebay. Looks like a very valuable lens.

Good idea. Will save you postage and wear and tear on the lens if you just get the scale and screw it in place. Grimes can make it without the lens and just send it to you. The Fujinon 450/12.5 is a very special lens, enjoy it.

l2oBiN
9-Jan-2019, 18:08
Thanks you. Simply ordering the scales is a great idea!

Does this still need verification or calibration of any sort? Or is it generic for all copal 1 shutters?

Do the scales differ for various copal shutters (ie are they number specific to the shutter sizes)?

Is there any info out there regarding copal aperture scales and designation for various lenses? It would be great if just surplus scales could be ordered...

Whir-Click
9-Jan-2019, 18:12
A fantastic, peerless lens. Congratulations!

Until you find/have engraved the proper aperture scale, just mentally double all the numbers on the current scale. Your results will be perfect.

Duolab123
9-Jan-2019, 19:38
A fantastic, peerless lens. Congratulations!

Until you find/have engraved the proper aperture scale, just mentally double all the numbers on the current scale. Your results will be perfect.

Genius!

Duolab123
9-Jan-2019, 19:43
Thanks you. Simply ordering the scales is a great idea!

Does this still need verification or calibration of any sort? Or is it generic for all copal 1 shutters?

Do the scales differ for various copal shutters (ie are they number specific to the shutter sizes)?

Is there any info out there regarding copal aperture scales and designation for various lenses? It would be great if just surplus scales could be ordered...

The scale may just be part of it. I have no idea if these were made as a standard service part. I think if you look they may be riveted in place. I would call SKG or a shutter shop and get an idea. A new shutter would be over 500 bucks so it's worth your time to do some checking around. Very nice lens.

Dan Fromm
9-Jan-2019, 19:45
Genius!

Perhaps. You should check first. Fire the shutter on "T", move the diaphragm to as wide as it will go. Then close it very slowly. If the blades first begin to appear when the pointer is at 6.3, the advice is good. Otherwise, not. If they become visible before the pointer is at 6.3, get a new scale. If they become visible after the pointer has passed 6.3, the point on the scale where they become visible corresponds to 12.5. Your shutter's scale is divided into 1/3 stops. Three 1/3 stops closed from f/12.5 is f/18, six is f/25 and so on.

l2oBiN
9-Jan-2019, 20:39
I might be in luck. The aperture diaphragm starts to dhow up at 6.3. So this should correspond to 12.5? The doubling should then work?! (Awesome if it does). In the meantime I will start looking for a replacement #64 set.

What is the significance of firing the shutter on T?

Leigh
9-Jan-2019, 21:08
What is the significance of firing the shutter on “T”?
It just holds the shutter blades open so you can observe the diaphragm blades.

- Leigh

l2oBiN
9-Jan-2019, 21:09
It just holds the shutter blades open so you can observe the diaphragm blades.

- Leigh

Cant this be done with the preview lever?

Leigh
9-Jan-2019, 21:14
Can’t this be done with the preview lever?
Your question was about firing the shutter on "T".

- Leigh

l2oBiN
10-Jan-2019, 02:16
I might have found the scales but in a chrome ring copal shutter 1. Would they be a straight swap over to the black ring one?

Duolab123
10-Jan-2019, 18:31
Perhaps. You should check first. Fire the shutter on "T", move the diaphragm to as wide as it will go. Then close it very slowly. If the blades first begin to appear when the pointer is at 6.3, the advice is good. Otherwise, not. If they become visible before the pointer is at 6.3, get a new scale. If they become visible after the pointer has passed 6.3, the point on the scale where they become visible corresponds to 12.5. Your shutter's scale is divided into 1/3 stops. Three 1/3 stops closed from f/12.5 is f/18, six is f/25 and so on.

Yes, I thought of your point 2 seconds after I made the post. I have a 65mm f 5.6 Super Angulon, the aperture blades are closed at least halfway when the lens is wide open.
If you need an accurate setup, this isn't a DIY.

minh0204
11-Jan-2019, 05:29
I can send you a scan of my factory Black Copal f/12.5 scale so you can print it out and tape it over yours.

l2oBiN
11-Jan-2019, 06:03
I can send you a scan of my factory Black Copal f/12.5 scale so you can print it out and tape it over yours.

That would certainly be helpful while I look for a solution!

Could you scan both upper and lower please?

minh0204
12-Jan-2019, 03:59
Here you go

https://drive.google.com/open?id=10vipGyRypH8rqnaP-rQ_JDS1clJq4ox1

l2oBiN
12-Jan-2019, 04:25
Here you go

https://drive.google.com/open?id=10vipGyRypH8rqnaP-rQ_JDS1clJq4ox1

Thank you!