| Fixed Lens RF This forum is dedicated to the numerous and popular fixed lens rangefinders, including but not limited to the Canon Canonets, Konica III and S series, Minoltas, Ricohs, Vivitars, and so many others. Note fixed lens Olympus , Yashicas, Argus and Retina have separate forums. |
 |
konica S2 lens colimation |
 |
11-28-2007
|
#1
|
|
The man who shot film
sanmich is offline
Join Date: Nov 2006
Posts: 2,775
|
konica S2 lens colimation
Hi
I have rebuilt a nice konica S2. Now I have tested it and the focus is off by some 5 inch at closest distance. The RF is spot on, both at infinity and at 3 feet.
What did I got wrong when reassembling?
Any possible experiment to understand the source of the problem?
Thanks
Michael
__________________
Michael
Gloire a qui n'ayant pas d'ideal sacro-saint se borne a ne pas trop emmerder ses voisins (Brassens)
GAS rehab
|
|
|
|
|
11-28-2007
|
#2
|
|
Registered User
greyhoundman is offline
Join Date: Apr 2007
Posts: 231
|
If it is right on at infinity and 3 feet, there is nothing to adjust.
I'd double check using ground glass at the film plane. If it is spot on, you've done all you can.
The S2 has a close focus of .9 meters.
|
|
|
|
|
11-28-2007
|
#3
|
|
The man who shot film
sanmich is offline
Join Date: Nov 2006
Posts: 2,775
|
Thanks for the answer.
The RF is calibrated as it should.
Still, the lens seems off.
As I did dismantle both the front and the back optic blocks, I was wandering maybe I did something wrong?
Do you know if each lens is fitted to the body?
Is there some kind of shimming?
Thanks
Michael
__________________
Michael
Gloire a qui n'ayant pas d'ideal sacro-saint se borne a ne pas trop emmerder ses voisins (Brassens)
GAS rehab
|
|
|
|
|
11-28-2007
|
#4
|
|
Registered User
greyhoundman is offline
Join Date: Apr 2007
Posts: 231
|
I've taken a lot of them apart. Never saw a single shim. They are mass produced, not custom fitted. Kind of hard to get the lens elements in wrong.
Run a roll of film and make accurate notes of distance for each shot. Use a tripod to reduce shake blur.
|
|
|
|
|
11-28-2007
|
#5
|
|
The man who shot film
sanmich is offline
Join Date: Nov 2006
Posts: 2,775
|
Well my technique is a bit different:
I shot (several times) a metal ruler with a red sticker in the middle.
The ruler is facing me and lays at about 45 degrees angle.
I focus on the sticker, then I check on the pictures where is the zone of focus.
I did not see any shim, so maybe I got something wrong when reassembling the lens or the lens plate on the camera.
I must say that beside that problem and the huge amount of time invested in repairing it, it's a beautiful camera and a fantastic mechanical design.I would like very much to see it work...
Michael
__________________
Michael
Gloire a qui n'ayant pas d'ideal sacro-saint se borne a ne pas trop emmerder ses voisins (Brassens)
GAS rehab
|
|
|
|
|
11-28-2007
|
#6
|
|
Registered User
greyhoundman is offline
Join Date: Apr 2007
Posts: 231
|
Did you take the focusing helical apart?
|
|
|
|
|
11-28-2007
|
#7
|
|
The man who shot film
sanmich is offline
Join Date: Nov 2006
Posts: 2,775
|
No, although I would have liked to, to relube it.
__________________
Michael
Gloire a qui n'ayant pas d'ideal sacro-saint se borne a ne pas trop emmerder ses voisins (Brassens)
GAS rehab
|
|
|
|
|
11-28-2007
|
#8
|
|
Registered User
greyhoundman is offline
Join Date: Apr 2007
Posts: 231
|
I wouldn't unless it is really needed.
|
|
|
|
|
11-28-2007
|
#9
|
|
Bottom Feeder
titrisol is offline
Join Date: May 2005
Location: Rotterdam / Quito
Age: 42
Posts: 1,305
|
Check the focus at infinity, I wrote the procedure in the Vito CLR thread.
I think there is also a descritpion in the KYphoto website
FOUND IT! http://www.kyphoto.com/classics/collimator.html
And also a complete overhauls of the S2 here:
http://feuerbacher.net/photo/frame.h...toS2.html~Main
__________________
When I think back of all the crappy pictures I've taken, it's a wonder I can see at all......
APX It gives us the nicer grays/It gives the cleanes whites/Makes you think all the world’s a sunny day, oh yeah/I got a nikon camera/I love to take a photograph
MAMA DON'T TAKE MY APX AWAY........
Sorry Paul Simon
My gallery
Last edited by titrisol : 11-28-2007 at 11:01.
|
|
|
|
|
11-29-2007
|
#10
|
|
Cobalt thorium G
Dr. Strangelove is offline
Join Date: Jul 2007
Posts: 226
|
Quote:
|
Originally Posted by titrisol
|
The backsighting technique is really neat. I have checked focus with the ground glass on film plane method, but it is not easy, can be time consuming and you still can't be sure that you got it right. Backsighting appears much easier to do and can be done comfortably indoors. Great tip, thanks! |
|
|
|
|
11-29-2007
|
#11
|
|
Bottom Feeder
titrisol is offline
Join Date: May 2005
Location: Rotterdam / Quito
Age: 42
Posts: 1,305
|
__________________
When I think back of all the crappy pictures I've taken, it's a wonder I can see at all......
APX It gives us the nicer grays/It gives the cleanes whites/Makes you think all the world’s a sunny day, oh yeah/I got a nikon camera/I love to take a photograph
MAMA DON'T TAKE MY APX AWAY........
Sorry Paul Simon
My gallery
|
|
|
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
All times are GMT -8. The time now is 01:38. |
|
|
