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campy
Joined: 23 Sep 2002
Posts: 51
Location: mass.
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 Posted: Tue Oct 07, 2014 9:37 pm Post subject: Crown Graphic rangefinder mirror |
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| I stupidly cleaned the yellow tinted mirror on my Crown Graphic and the coating came off. Anyone know of replacements or mods that can be done. I tried yellow highliter but you need to put multiple coats and it starts to blur. |
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45PSS
Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.
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| Posted: Tue Oct 07, 2014 10:06 pm Post subject: |
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| Quote: | | I stupidly cleaned the yellow tinted mirror on my Crown Graphic and the coating came off. Anyone know of replacements or mods that can be done. |
Not stupid. The coating on some beamsplitters comes off with window cleaner, some come off just rubbing the grime off with a cotton swab.
http://www.graflex.org/articles/romney/rangefinder-mirrors.html
Get new beamsplitter at http://www.scientificsonline.com/product/mirror-type-beamsplitter
cut it to size with a glass cutter, moderate difficulty. Clamp between two pieces of wood holding one side stationary while press down firmly on the other side.
the new material is thinner than the original. put paper shims along the mount frame between the frame and mirror to position the front surface at the same position as the original. Put the coated side forward.
recalibrate the rangefinder according to the service instructions
http://www.southbristolviews.com/pics/Graphic/manual-pdf/TRFService.pdf
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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campy
Joined: 23 Sep 2002
Posts: 51
Location: mass.
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| Posted: Wed Oct 08, 2014 8:43 pm Post subject: |
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| Does it need to be yellow like the one that's in there? Is the one your link shows the one I should order? I just want to double check that it's the mirror on the right side as looking through it. |
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campy
Joined: 23 Sep 2002
Posts: 51
Location: mass.
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| Posted: Wed Oct 08, 2014 8:48 pm Post subject: |
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| I took a quick look at the adjustments and it says I need a master cam. Where do you find one of those? |
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45PSS
Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.
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| Posted: Wed Oct 08, 2014 10:36 pm Post subject: |
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| Quote: | | Does it need to be yellow like the one that's in there? |
No. don't know if yellow was the coating they used, added for contrast, or from age.
Some of the new stock is clear, some light blue. You can always add a thin filter material of any color over the mirror if you wish.
| Quote: | | Is the one your link shows the one I should order? |
yes. link provided for clarity and convenience.
| Quote: | I just want to double check that it's the mirror on the right side as looking through it.
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beamsplitter on the right, standard mirror on the left as you look through the rangefinder.
| Quote: | | I took a quick look at the adjustments and it says I need a master cam. Where do you find one of those? |
Make one. Use your existing cam for the outline and make the top the required height for the last half and the lead edge tapered for easy insertion. I use .030 brass plate available at hardware and home improvement stores. The originals are nickel plated aluminum. Aluminum or steel can be used also. Cam making was well discussed several years ago. use the search function for cams or rangefinder cams selecting the all the terms check dot. limit your search to speed graphic help to reduce erroneous results.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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campy
Joined: 23 Sep 2002
Posts: 51
Location: mass.
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| Posted: Wed Oct 08, 2014 11:10 pm Post subject: |
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| Thanks for all your help. |
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