Exactly 25 years ago Durst has presented the first halogen colour mixing heads for amateur enlargers. As the first manufacturer world-wide Durst introduced the mirror-type and heat absorbing mixing box system which evenly spreads the light of the tungsten-halogen lamp over the negative area and yields short exposure times, even illumination and suppresses flaws in the negative. Originally dichroic filters have been used in space technology. After that Durst had used them successfully in professional colour enlargers, Durst decided to build them also into colour heads of amateur enlargers and in this way allow the enthusiasts to take a great pass toward security of professional colour enlarging.

On the occasion of this anniversary Durst offers a limited special designed edition of the most successful, over 100.000 times world-wide sold 6x7cm (2 1/4x2 3/4 in.) colour enlarger M 605 Color.