Microphotography technology

Minos and Texana's close-up photography function is very useful in document shooting. The following table is a close-up document shooting guide for some miniature cameras:

Minimum distance file of miniature camera

Minos b 20cm10x13.5cm.

Texina 35 type 23cm11.5x17cm.

Texina automatic 30cm 15.4x23

Adissa16 40 cm18x25.5 developing tank: Special developing tank can be used to develop miniature camera film, such as Minos solar developing tank for developing Minos film and general solar developing tank for developing 16mm film; There is no need for darkroom to use these developing tanks.

Spiral roll: You can also take the finished film out of the film roll in the darkroom, carefully load it into Minos 8x 1 1mm spiral roll or 16mm spiral roll, put it into the developing tank, and then develop it according to the procedure. Darkroom and utensils must be as clean as possible, because the same dust may not be obvious on 35 mm film, but the magnification of microfilm is 2 to 3 times that of 35 mm film, and any dust will be too obvious.

Color films should be developed with C4 1 or E6 developer, and black and white films should be developed with granular developer. Darkroom must be clean and dust-free, the temperature must be accurately controlled, and developer and fixer must be prepared with distilled water to ensure that there are absolutely no impurities. All negatives taken by miniature cameras must be enlarged. Zoom in to 10 cm x 15 cm and you can store it in the photo album. Enlarge it to more than 20x25 cm, and you can insert the frame.

Magnifier can be refitted with ordinary 35mm magnifier, but the lens with a focal length of 50 mm to 60 mm used to enlarge the 35mm film must be replaced with a Mi magnifier lens with a focal length of 25mm. Some magnifying glass factories sell 14x2 1mm, 12x 17mm, 8x 1 1mm metal negative frames; You can also cut out the required negative frame with black paper.

The following table shows the magnification and magnification distance of negatives with different phase frames when they are magnified to 20x25 with 25mm enlarger lens and15mm lens.

The negative side length of miniature camera magnifies 25mm enlarger lens distance and Minos amplifier image distance.

texina type 35 14x 2 1 1540cm

Adisa1612x1717 45cm

Minos B8x 1 1 25 65cm 39cm

In this way, a magnifying glass with a focal length of 25mm is suitable for Texina 35 and Adisa 16 films, because the magnifying glass is only 40-45cm away from the bottom plate of the magnifying glass, while for the 8x 1 1mm film of Minos miniature camera, the 25mm magnifying glass must be 65cm away from the bottom plate of the magnifying glass, which is barely usable. It is best to use Minos magnifying glass specially equipped with 15 mm lens, and the lens of the magnifying glass is only 39 cm away from the bottom plate of the magnifying glass.