Do you own a folded perspex ground glass protector?

[Uri A]

If you do, would you please take a couple snaps of it for me and post them here?? One in place on the camera and one just of the thing itself?

I'd like to try and make one.

Thank you!

[Leigh]

I have a plastic GG protector, but I have no clue what perspex means.

Is it a brand name, or a design, or a type of plastic, or... ???

- Leigh

[Daniel Stone]

Leigh,
Perspex is hard acrylic plastic, usually in sheet transparent(sometimes tinted various colors) form:
http://images.lmgtfy.com/?q=perspex
-Dan

[Leigh]

Thanks, Dan. The common name here in the US for clear acrylic is Lucite.

Here are two shots of mine, obviously a commercial product, but no name or other ID.

http://www.atwaterkent.info/Images/GGProtT_0323.jpg
http://www.atwaterkent.info/Images/GGProtS_0322.jpg

The part that goes inside, in front of the GG, is perfectly flat and extends the full width.

The material is .080" (2mm) thick.
The item was formed in two steps.
1) The two raised features on the back were made using vacuum forming techniques.
2) The cylinder on the end was formed by warming the material and bending it around a mandrel.

- Leigh

[Uri A]

Thanks fellows.

I once saw a clear perspex (plastic) one that seemed to be just U-shaped and slotted into the film holder space, but it was a tiny photo online, so I couldn't see the details. As you said Leigh, Perspex is easy to bend with a heat gun or around a heated piece of metal pipe.

I think I'll just go ahead and make one. I'll let you know how I go.

[Uri A]

Thanks for the photos Leigh :)

[Leigh]

Glad I could help. Good luck with the project.
We'll be anxious to see the results.

- Leigh

[Uri A]

Haha! Don't hold your breath. when I say "I think I'll..." that means sometime in the next couple years :D

[Leigh]

Couple of years???

Your to-do list is an order of magnitude shorter than mine. :D

I was going to write mine down a while back, just so I wouldn't forget anything, but
the local office supply store didn't have enough paper in stock. :eek:

- Leigh

[Uri A]

hehe

[Jason Greenberg Motamedi]

Canham makes a U shaped acrylic ground glass protector.
http://mpex.com/media/catalog/product/cache/1/image/325x/9df78eab33525d08d6e5fb8d27136e95/i/m/image_137.jpg

[Tin Can]

Not sure why we need GG protection on the inside, maybe it is just easier to slide it in. I have made a couple external covers for Sinar 5X7 and 8X10 out of foamcore, they fit right into a notch and a slide lock. Almost no cost, maybe I will sell them with my wire dark cloth thingy. Only kidding...maybe.

[Jac@stafford.net]

Not sure why we need GG protection on the inside, maybe it is just easier to slide it in. I have made a couple external covers for Sinar 5X7 and 8X10 out of foamcore, they fit right into a notch and a slide lock. Almost no cost, maybe I will sell them with my wire dark cloth thingy. Only kidding...maybe.

I make something similar for the Deardorff 8x10, but in thin, laminated wood. The part that faces the lens seals the whole affair from dust. It is an advantage. (It will work for very many other cameras other than the Deardorff, but this particular one conforms to the specific shape of the Deardorff film holder entry, in particular at the user side of the holder entry.)

It also has an offset so that it is not flush with the user side of the glass in order to offer a 'crush' space that obviates the transmission of shock to the glass.

IMHO, most GG protectors are impressionistic designs from non-users.
.

[Uri A]

Jason: Thanks! That's exactly the one I was referring to!

Jac: Can you post a photo of your one please? Do you sell them?

[Leigh]

Not sure why we need GG protection on the inside, maybe it is just easier to slide it in.
Cameras don't always have lenses mounted.

Or perhaps a lens could slip through the front opening, damaging the GG if the camera was lying on its back.

- Leigh

[Tin Can]

I try to mount a blank lens board to unused cameras...

Sometimes made of matte board, to keep out dust.

I do see your point, now...



Cameras don't always have lenses mounted.

Of perhaps a lens could slip through the front opening, damaging the GG if the camera was lying on its back.

- Leigh

[Keith Fleming]

I have one of the Canham ground glass protectors for my 8X10. Works great--good protection, easy to insert and remove. The one problem I've had with it--please don't laugh--is that it is clear plastic, and a couple of times when rushed I've found myself trying to focus through the protector with my loupe. So now I have a big "X" of gaffers tape on it. One less dumb mistake to worry about.

Keith

[Tin Can]

Sorry, had to laugh, I would do the same, what was Mr Canham thinking! I still have troubles with those darn dark slides...

and today, I thought I would shoot an old Samsung Evoca 70, I found in a drawer. The self-closing lens cover, never opened, good thing it was ancient Tri-X.


I have one of the Canham ground glass protectors for my 8X10. Works great--good protection, easy to insert and remove. The one problem I've had with it--please don't laugh--is that it is clear plastic, and a couple of times when rushed I've found myself trying to focus through the protector with my loupe. So now I have a big "X" of gaffers tape on it. One less dumb mistake to worry about.

Keith

[Jody_S]

Couple of years???

Your to-do list is an order of magnitude shorter than mine. :D

I was going to write mine down a while back, just so I wouldn't forget anything, but
the local office supply store didn't have enough paper in stock. :eek:

- Leigh

This is what wives are for. Apparently. Well, mine has certainly taken over my 'to-do' list.

[scm]

http://stevemidgleyphotography.com/IMG_0426.jpg


http://stevemidgleyphotography.com/IMG_0422.jpg

[Tin Can]

That is nice, something is tickling my thoughts that I have seen a form like that before, that was not custom made, and not for LF cameras.

Too bad, Keith does not have prices for these online.

I hate to pester him for a price of something that may not fit my non-Canham cameras.

I know he is just waiting to sell these...

While I am on a roll, it would be great if LF camera makers would publish their replacement GG actual sizes, so we could use their excellent GG in lesser cameras.

tap tap hello!






http://stevemidgleyphotography.com/IMG_0426.jpg


http://stevemidgleyphotography.com/IMG_0422.jpg

[scm]

Here is a somewhat less elegant take on the same basic concept with materials that a lot of us might already have:


http://stevemidgleyphotography.com/IMG_0429.jpg


http://stevemidgleyphotography.com/IMG_0428.jpg

[Tin Can]

Very nice!

[Doremus Scudder]

Here is a somewhat less elegant take on the same basic concept with materials that a lot of us might already have:

Wood is almost always more elegant than plexiglass... :)

Best,

Doremus

[Jac@stafford.net]

Here is a somewhat less elegant take on the same basic concept with materials that a lot of us might already have:


http://stevemidgleyphotography.com/IMG_0429.jpg


http://stevemidgleyphotography.com/IMG_0428.jpg

That is very close to my product except mine is specifically made for the Deardorff which has subtle, but perhaps an Insignificant difference.

I like yours more than my own. I will not quit the day-job. 😌

[Jason Greenberg Motamedi]

https://www.badgergraphic.com/store/cart.php?m=product_list&c=166

[Jac@stafford.net]

https://www.badgergraphic.com/store/cart.php?m=product_list&c=166

Those are generally crap. Whatever works for you.

[Jason Greenberg Motamedi]

Those are generally crap. Whatever works for you.

They are no different from the Canham ones.

[Light Guru]

Those are generally crap. Whatever works for you.

How exactly is a simple piece of teardrop shaped plexiglass crap? It's so simple of a design that they cannot be crap.


Look at these photos explain how they are crap. Because it is the exact one that badger photographit sells here https://www.badgergraphic.com/store/cart.php?m=product_list&c=166 that u call crap



http://stevemidgleyphotography.com/IMG_0426.jpg


http://stevemidgleyphotography.com/IMG_0422.jpg

[Steve Smith]

Thanks, Dan. The common name here in the US for clear acrylic is Lucite.

Perspex is known as Plexiglass in the US.


Steve.