WTB: Cambo 4x5 ground glass

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Alastair Moore
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WTB: Cambo 4x5 ground glass

Postby Alastair Moore » 23 Aug 2012, 20:23

I bought a sheet from eBay, the new yanke glass. Took a month to deliver, fresnel was scratched and it didn't fit (was half a mm too wide) so a month without use of my Cambo 4x5 and still no resolution. If anyone has a ground glass or has seen a ground glass for my camera, let me know! In the mean time, I wait for the guy to get in touch.

Also, unrelated but what would be the best way of shaving off half a mm of a sheet of glass?

Walter Glover
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Re: WTB: Cambo 4x5 ground glass

Postby Walter Glover » 23 Aug 2012, 20:42

Alastair,

I have a spare Sinar 4x5 groundglass which might do the trick.
Walter Glover

"Photography was not a bastard left by science on the doorstep of art, but a legitimate child of the Western pictorial tradition." —Robert Galassi

Lachlan717
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Re: WTB: Cambo 4x5 ground glass

Postby Lachlan717 » 23 Aug 2012, 21:22

Welly,

Have you considered trying to grind your own GG? It doesn't seem to be too complex.

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Alastair Moore
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Re: WTB: Cambo 4x5 ground glass

Postby Alastair Moore » 23 Aug 2012, 22:04

Hi Lachlan,

I haven't actually but to be honest I probably don't have the tools or space to do so. Inner city living and all that! It's a thought though.

Walter, would love to try it. I'll get the dimensions and if you can let me know if it's the same, that would be great.

Cheers!

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Maris
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Re: WTB: Cambo 4x5 ground glass

Postby Maris » 24 Aug 2012, 11:39

I make all my replacement ground-glasses. It takes about 20 minutes of mild labour.

First get two pieces of window glass or clear picture frame glass cut to the exact size by the local glass shop. Ask them to ease the edges to avoids cuts when handling.

Then put one piece on a pad of wet newspaper so it doesn't slide around and grind the other against it with wet 1000 or 1200 grit between. When the grit stops cutting wash it off and start again with a bit of fresh stuff. Swap top and bottom glasses from time to time. If some patches seem slow to grind selective finger pressure bends (!) the glass enough for the grit to bite. When the grind is even wash and dry the glasses; one to use plus one spare.

I got a free sample of about 10g of 1000 grit from Naxos Australia about 20 years ago. That's enough for at least a dozen 8x10 glasses.

mark l
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Re: WTB: Cambo 4x5 ground glass

Postby mark l » 24 Aug 2012, 11:53

Maris, I too have been making my own for about thirty years, dead simple, exactly as you described, good advice, don't need a workshop, I do it on my kitchen table, very satisfying.

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Alastair Moore
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Re: WTB: Cambo 4x5 ground glass

Postby Alastair Moore » 24 Aug 2012, 12:01

Well that sounds far easier than I thought it would be. Even a DIYphobe such as myself could manage that. I shall try it out this weekend.

Cheers!

Lachlan717
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Re: WTB: Cambo 4x5 ground glass

Postby Lachlan717 » 24 Aug 2012, 18:12

There are a couple of threads on this topic on LFPF; a search will find them.

Also, you could consider getting in touch with Steve Hopf at http://www.hopfglass.com. These are really, really good quality and he's a grouse bloke as well!

smbooth
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Re: WTB: Cambo 4x5 ground glass

Postby smbooth » 25 Aug 2012, 12:01

Your local glass man should be able to grind a 1/2mm of the edge.
As for grinding your own, its quite easy, just get some silicone Carbide grit in 600 from your local lapidary store, and use a 100mm square glass tile as a grinding plate. Bit of water bit of grit and grind away. Should take all of 30min.

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Alastair Moore
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Re: WTB: Cambo 4x5 ground glass

Postby Alastair Moore » 25 Aug 2012, 13:15

Walter Glover wrote:Alastair,

I have a spare Sinar 4x5 groundglass which might do the trick.


Hi Walter,

The dimensions are 124.5mm x 102mm

Cheers,

Alastair


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