possible new way to make ground glass?

Dan's45 · May 10, 2005

just a thought...has anyone ever thought of making a loupe-quality ground glass,then mounting a fresnel behind it to amplify the image as far as brightness goes...just something that popped in my head last night and wondered if it was possible to make it market it and maybe others like us could benefit from it? maybe the guy that makes the ground glass on this site might find this useful. just tossing this out and seeing what anyone thinks and is it possible to do. this is one of many thoughts that pass through my by brain quite frequently an thought i'd share with everyone before it passes on to idea graveyard...lol! anyway.......any thoughts..give me a shout an let me know what you think!
Happy shooting!
Daniel

Nathan Smith · May 10, 2005

I'm not sure I follow you ... how is this different from how a fresnel is usually used with a groundglass?

Nathan

Surly · May 10, 2005

Yes, please elaborate.....the Speed Graphics and Rolleis came with a fresnel mounted behind the ground glass. Why is your idea different? I'm not understanding.

eclarke · May 10, 2005

As are my Arcas..Evan

noseoil · May 10, 2005

He's talking about a magnifier as the glass, no loupe? tim

Dan's45 · May 11, 2005

RE: possible way to make ground glass?

hello again,
i'm sorry i wasn't too clear on this...sometime this happens when i try pass an idea across. what i meant is that having a loupe quality ground glass too
magnify the image instead of using a loupe that scrathes up your fresnel lens. in that, as loupe quality galss...meaning the power of a loupe(4x,8x,or whatever takes your fancy) and have it available in say 4x5,5x7 and 8x10 to start w/ and see what it does. i hope this is a little more clear now. let me know know what you think.thanks again!
Happy shooting
Daniel

Ole · May 11, 2005

I'm afraid that will be either very heavy, or very thick. Probably both...

Donald Miller · May 11, 2005

Well at first glance this would appear to be a solution until one considers the characteristics that this would bring to bear. The first is that when you magnify the total image as what you are enquiring into the economics come to bear. It is a far diffierent matter to produce an optical system the size of a focusing loupe then it is to produce and optical system the size of a 4x5 inch ground glass or 8X10 and perhaps larger.

Dan's45 · May 12, 2005

RE: possible way to make ground glass?

Hello again,
well...it was a thought that passed through my head at the time. these were not matters that were included,but only just the thought. i just figured it might might work. it appears to be more trouble than its worth i guess. oh well, i tried...lol. thanks for your thoughts.
Happy Shooting,
Daniel

Struan Gray · May 13, 2005

If you think about how you might actually build something like this you come up with........

.....a reflex viewer.

You can't have anything flat that magnifies the whole view at once - lenses need a certain standoff to work. A 5x loupe has a focal length of about 50mm, so roughly speaking it's centre must be 50 mm or so from the ground glass when being used. Worse, if you then think about the angle of view it needs to have to see the whole screen at once, you're going to need something like a 47 mm Super Angulon XL to do the job - a tad more than most of us want to spend.

possible new way to make ground glass?

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