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wilkidm
Joined: 17 Feb 2003 Posts: 27 Location: Kentucky
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Posted: Sat Mar 29, 2003 2:17 am Post subject: |
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Okay, I know I've seen this post before, but for the life of me, I can't find it. I have a RB12 and I have a Speed Graphic with the 135 Optar. The only problem is that I don't see a mask listed for this particular lens/camera combination. The closest I can find is a mask that goes to 127mm. Which mask do I need for mine? Sorry for any duplication. |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Sat Mar 29, 2003 3:59 am Post subject: |
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Mask part number 30715P4 4x5 picture size is for lens focal length 127-149mm. 3 1/4x 4 1/4 lens focal length 114-121mm. 2 1/4 x 2 3/4 lens focal length 70-84mm.
_________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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wilkidm
Joined: 17 Feb 2003 Posts: 27 Location: Kentucky
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Posted: Sat Mar 29, 2003 2:57 pm Post subject: |
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Thanks for the part number, but what mask number is that to get a 6x6cm picture on a 4x5 camera with a 135 lens? Is it a number 14? Thanks for the help! |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Sun Mar 30, 2003 6:46 am Post subject: |
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mask part number 30715P4=mask catalog number 9105-4.
for 2 1/4 x2 1/4 mask catalog number 9105-12=100-114mm, 9105-13=243-302mm, 9105-14=116-127mm, 9105-15=129-152mm, 9105-17=154-191mm, 9105-20=78-90mm.
_________________
While a picture may be worth a thousand words, a quality photograph is worth a million.
[ This Message was edited by: 45PSS on 2003-03-29 22:52 ] |
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worldphoto
Joined: 05 Feb 2003 Posts: 199 Location: Southern California
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Posted: Sun Mar 30, 2003 4:45 pm Post subject: |
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I own a similar 4x5 Crown Graphic/135mm lens combo.
You are right. 22 mask is a #14.
23 mask is a #8.
and 45 sheet film mask is #4. |
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Baker
Joined: 08 Apr 2002 Posts: 85 Location: Texas
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Posted: Thu Apr 03, 2003 9:02 pm Post subject: |
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What's a #9 mask for? |
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sobahguy
Joined: 09 Oct 2001 Posts: 173 Location: Massachusetts
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Posted: Thu Apr 03, 2003 10:01 pm Post subject: |
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Hello.....
According to 10th ed GGP #9 mask......
Format/
Lens focal length
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2.25 x 3.25
4-9/16" to 6" focal length
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3.25 x 4.25
6-1/16" to 7" focal length
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4 x 5
6-11/16" to 8-1/2" focal length
[ This Message was edited by: sobahguy on 2003-04-03 14:05 ] |
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sobahguy
Joined: 09 Oct 2001 Posts: 173 Location: Massachusetts
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Henry
Joined: 09 May 2001 Posts: 1642 Location: Allentown, Pennsylvania
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Posted: Fri Apr 04, 2003 6:17 pm Post subject: |
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Unfortunately those charts don't include the mask numbers for 2-1/4" x 2-3/4" images. Could this information be added to that page? I have posted same on this board previously, as taken from an RH-20 Roll-Vance instruction booklet. |
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