Provide

GLOBAL Fresnel Lens with Grid Ground Glass

Fresnel screen and Grid Ground Glass

in Stock:

Linhof 2x3, 4x5, 5x7, 8x10

Deardorff 11x14, 8x10, 5x7, 4x5

Sinar 8x10, 5x7, 4x5

Cambo/Calumet 8x10, 5x7, 4x5

Canham 4x5, 5x7, 8x10

Tachihara 4x5, 8x10

Toyo 8x10, 4x5

Wisner Technical  4x5, 5x7, 8x10

Wista 4x5, 5x7, 8x10

Zone VI  4x5, 5x7  8x10

Shen Hao  4x5, 5x7, 8x10

We Accept Special Order

ABOUT FRESNEL LENS

The Fresnel lens was invented by French physicist Augustine Fresnel, the Augustin Fresnel first used this lens design to build a glass Fresnel lens - lighthouse lens in 1822.
The Fresnel lens is a thin, flat optical lens which consists of a series of small narrow concentric grooves on the surface of a lightweight plastic sheet in order to reduce the thickness, weight and cost. Each groove is at a slightly different angle than the next and with the same focal length in order to focus the light toward a central focal point. Every groove can be considered as an individual small lens to bend parallel Fresnel light waves and focus the light. The lens actually eliminates some spherical aberration.

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Installation of Fresnel lens or Super Screen

1. Remove the focusing screen back from the camera and then

remove any exterior components from the back.

2. Remove retaining screws, clips and gaskets - remove old

screen. Remember the assembly order of the original

components.

3. Blow any dust off the screen and insert matte surface side

towards lens.

4. Lay glass cover plate on top. Inspect for any trapped dust or

lint.

5. Center in frame, reinsert gaskets, clips and screws. Screw

finger tight with correct size jeweler’s screwdriver.

The focusing screen goes where the ground glass used to be. The antireflective

glass cover plate goes between the Fresnel lens and your eye.

(For 4x5 view cameras only)

1. Remove the focusing screen back from the camera and then remove

any exterior components from the back, such as the hood, etc.

2. Remove retaining screws, clips and gaskets – remove old screen.

Remember the assembly order of the original components.

3. Blow any dust off the screen. Place the focusing screen (matte

side facing towards the eye) in the frame. This piece takes the place

of the original Fresnel lens.

4. Lay the glass cover plate on tope of the matte surface. Inspect for

any trapped dust or lint.

5. Center in frame, reinsert gaskets, clips and screws. Screw finger

tight with correct size jeweler’s screwdriver.