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Mask Question

 
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wilkidm



Joined: 17 Feb 2003
Posts: 27
Location: Kentucky

PostPosted: Sat Mar 29, 2003 2:17 am    Post subject: Reply with quote

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: 3245
Location: Mid Peninsula, Ca.

PostPosted: Sat Mar 29, 2003 3:59 am    Post subject: Reply with quote

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.

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wilkidm



Joined: 17 Feb 2003
Posts: 27
Location: Kentucky

PostPosted: Sat Mar 29, 2003 2:57 pm    Post subject: Reply with quote

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: 3245
Location: Mid Peninsula, Ca.

PostPosted: Sun Mar 30, 2003 6:46 am    Post subject: Reply with quote

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.

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[ 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

PostPosted: Sun Mar 30, 2003 4:45 pm    Post subject: Reply with quote

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

PostPosted: Thu Apr 03, 2003 9:02 pm    Post subject: Reply with quote

What's a #9 mask for?
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sobahguy



Joined: 09 Oct 2001
Posts: 171
Location: Massachusetts

PostPosted: Thu Apr 03, 2003 10:01 pm    Post subject: Reply with quote

Hello.....
According to 10th ed GGP #9 mask......

Format/
Lens focal length
-------------------------------
2.25 x 3.25
4-9/16" to 6" focal length
-------------------------------
3.25 x 4.25
6-1/16" to 7" focal length
-------------------------------
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: 171
Location: Massachusetts

PostPosted: Fri Apr 04, 2003 1:09 pm    Post subject: Reply with quote

Hi again.....i'm constantly finding new (to me) pages on this site. Here's the chart...

http://www.graflex.org/speed-graphic/viewfinder-masks.html



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Henry



Joined: 09 May 2001
Posts: 1443
Location: Allentown, Pennsylvania

PostPosted: Fri Apr 04, 2003 6:17 pm    Post subject: Reply with quote

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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