First handheld viewer for 41x101 mm. slides

Design: 1975
Lenses: Double achromatic d= 33mm.
Focal distance: 50 mm.
adjustments: focussing by pulling the lever at the side,
focussing one lens individually, height correction for both slides.
slide frame format: 41x101 and 50x50 mm.
slide format: 24x28 mm.
Illumination: daylight

This viewer was the first high quality hand held viewer for 2 slide frame formats. It took a lot of time to assemble these stainless steel viewers. All parts are soldered together. The brass lens containers oxidated fast by intensive use.

Wooden viewer.

Design: 1980
Lenses: single achromatic d= 23mm.
Focal distance: 60 mm.
adjustments: fixed focus
slide frame format: 41x101 mm.
slide format: 24x28 mm.
Illumination: daylight

Most of these viewers are used for build-in purpose in exhibitions. The aim was to build a cheap hand held viewer of wood. This wasn't a success for the public. The look of wood didn't give the impression of quality.

Small 41x101 mm. Stainless steel viewer.

Design: 1982 and next serie 1984
Lenses: Single achromatic d= 23mm.
Focal distance: 60 mm.
adjustments: fixed focus
slide frame format: 41x101 mm.
slide format: 24x28 mm.
Illumination: daylight

This was a very much wanted stainless steel viewer because of its size. It was easy to assemble. The design concept was also used for a 50x50 mm. version.

Short 41x101 mm. Stainless steel viewer

Design:1978
Lenses: Single achromatic d= 23mm.
Focal distance: 60 mm.
adjustments: focussing by screwing the lenses in or out the other tube
slide frame format: 41x101 mm.
slide format: 24x28 mm.
Illumination: daylight

This viewer was designed for handheld purpose but the weight was to high. This was caused by the long brass massive lens tubes. The aim was to simplify the housing and extend the lens tubes, it should shorten assembly time. Very quicly we stopped building these.

Buil in viewer for 41x101 mm.

Design:1978
Lenses: Single achromatic d= 23mm.
Focal distance: 60 mm.
adjustments: fixed focus
slide frame format: 41x101 mm.
slide format: 24x28 mm.
Illumination: lamp bulb. (too yellow)

This viewer was designed exclusively for exhibition (build-in) purpose. The total viewer is mounted behind the panel, only the two oculars are visible at the front. The total concept was to expensive for showing one slide.

Combined 41x101 and 50x50 mm. viewer

Design: 1980
Lenses: Double achromatic d= 33mm.
Focal distance: 50 mm.
adjustments: focussing by pulling the lever at the side,
focussing one lens individually, height correction for both slides and lens sepparation.
slide frame format: 41x101 and 50x50 mm.
slide format: 24x28 mm.
Illumination: daylight

This was the second generation high quality viewers for two slide frame formats. Now the lenses are chromized to prevent oxidation. Some models were suited with one adjustable lens container to correct differences in eye focussing. Again, this viewer took a lot of time of assembling. We stopped building it as soon as the Combi viewer came in producion.

Photoprint Viewer

Design: 1986
Lenses: Single achromatic d= 37mm.
Focal distance: 120 mm.
adjustments: focussing by pulling the front in and out the back part
Picture format: 100x150 mm..
Negative format: 18x24 mm.
Illumination: daylight

This viewer was designed to view prints of stereoscopic photo's. The negative are stereoscopic mounted in a 50x50 mm. stereoscopic frame and can be printed straight on paper with the correct window effect.

Super multi frame format viewer

Design: 1979
Lenses: interchangable single achromatic lenses, stacking of lenses is possible causing other focal lengthes.
Focal distance combinations: F= 47, 52, 55, 60 and 79 mm.
adjustments: focussing by turning the knob at the botom of the viewer,
focussing one lens individually, height correction for both slides and lens sepparation.
slide frame format: 41x101 and 50x50 mm. and 47x105 mm.
slide format maximum: 40x40 mm. (old standard)
Illumination: daylight or light attachment (lamp bulb).

This viewer could cover the whole range of frames, focal distances and adjustments.With its range of interchangable lenses, it became the best viewer ever made but very expensive, heavy and difficult to build.

Medium Format 60x130 mm. viewer

Design: 1982
Lenses: Single achromatic d= 36 mm.
Focal distance: 85 mm.
adjustments: focussing by pulling the lever at the side and lens sepparation.
slide frame format: 60x130 mm. (some with 67x130 mm.)
slide format: 55x55 mm.
Illumination: daylight

This viewer covered the demand for stereoscopic medium format viewers. Besides the adjustable hand-held version, also the build-in fixed focus has been produced.

First Aluminium 41x101 slide viewer 1994.

Design: 1994
Lenses: Double achromatic d= 23mm.
Focal distance: 60 mm.
adjustments: focussing by screwing the lenses in or out of the body and lens sepparation.
slide frame format: 41x101 mm.
slide format: 24x33 mm.
Illumination: daylight

This is the first viewer that was made of alluminium by a CNC milling-machine and designed by Jeroen de Wijs. This viewer became a turning point of production methode to the more modern system of series production. All previous stainless steel viewers were made by hand by Hugo de Wijs. This viewer was simple of design and easy to assemble and became the base for the successor; the Easy viewer.

Easy viewer

Design: 1997
Lenses: Single achromatic d= 23mm.
Focal distance: 60 mm.
adjustments: focussing by screwing the lens in or out of the housing and lens sepparation.
slide frame format: 41x101 and 50x50 mm.
slide format: 24x36 mm.
Illumination: daylight

This second generation CNC produced viewer was designed to include the 50x50 mm. frame format in the viewer. By turning the slide holder you could change the frame format.

Combi viewer model 1994

This is the first model of the Combi viewer series. The base of the viewer is a solid block of aluminium that is milled to its schape. The target was to make a viewer that could hold every small film format 3D slide for the frame formats 41x101 and 50x50 mm. Because of its good performance lenses and adjustments it became a very succesfull product. This first serie had plastic supports of the lens barrels which appeared to wear out easilly

Combi viewer model 1997

This second series of the Combi viewer was as succesfull as the first one. It had brass supports for the lens barrels and the fastening of the slide springs was improved including some other small improvments. It was often sold in combination with the light attachment. The light attachment worked well but wasn't a real succes; it was heavy, used a lot of power, and charging the batteries often caused problems.

 Viewmaster viewer 1999

The first series came of on the International Stereoscopic meeting in 1997. Especially the more fanatic collectors and specialists in the stereoscopic world own this viewer. At that time there wasn't a high quality viewmaster viewer available. Lateron it gave an impulse to others to make better or modified viewmaster viewers. Olthough the price was high, most custommers thought it was just a piece of art, and the optical quality was great. The only problem was that the strong enlargement resulted in 'unscharp' standard viewmaster reels. That's why we didn't choose to enlarge more (8.2 x). In 1999 we made a second serie of 63 pieces in several colors. At the end it was hard to sell the viewer. So we don't make it anymore.