KINOPTIK 25/2 APOCHROMAT FOR ARRI.S BOLEX SONY LUMIX BLACKMA À VILLERS CERNAY

KINOPTIK 25mm f 2 APOCHROMAT ARRIFLEX S mount                    but possibility to adapt several different mounts ! RARE §                                 (traduction en français ci-dessous)     * An apochromatic or apochromat lens is an improved version of the achromatic doublet  to ensure the correction of chromatic and spherical aberrations.    The achromat is limited to the correction of the focal distances of two beams of wavelengths  different.  Apochromat allows you to correct focal lengths for three different wavelengths.  The residual color dispersion is less than that produced by an aperture achromat  and equivalent focal length.  Apochromat also corrects spherical aberrations  on two wavelengths, against one wavelength with achromat.  The apochromat is an assembly of 3 lenses allowing to  correct the trajectories of 3 beams of different wavelengths  And also the variation of the focal length as a function of the wavelength in the  visible spectrum  The making of an apochromat  requires exceptional optical glasses of a particular construction to achieve this result.  Crown & fluorite glasses are generally used.  (source Wikipedia)    This is why these lens are very sought after and used by filmmakers and professional photographers!   It is: Very good cosmetic condition The adjustment rings rotate normally Clear lenses without mold and without "mist"   Protective caps front and rear   Original mount: ARRIFLEX S Possible adaptation on: BOLEX H16 / BEAULIEU or others with "C mount" adapter (photo 7) This lens also allows digital photography and filming! The results are "breathtaking" in quality! on these two devices: SONY Alpha NEX with "E mount" adapter (photo 8) LUMIX GH / BLACKMAGIC with "MFT 4/3" adapter (photo 9) fixing also possible on: LEICA M8 (photo 10)   (NOT tested! I don't have this type of device please make sure of its possible use before making your ordered) I can equip this lens with one of these adapter Please tell me when ordering the adapter that interests you: "C mount" or "E mount" or "MFT 4/3" or "LEICA M" Only one of these adapters will be delivered and fixed on the lens at no extra cost Careful assembly carried out in my workshop! **Due to epidemic consequences, shipping times may be extended  by a few days  *** ** The foreign buyer (outside the European Union) contacts me before bidding.  To determine the shipping costs (Large variation  depending on the country) ** ** Please read the general sales instructions your purchase implies acceptance **              KINOPTIK 25mm f 2 APOCHROMAT                  équipé d'une monture ARRIFLEX S           mais possibilité d'adapter plusieurs montures différentes                (démarche unique et rare profitez en) * Un objectif apochromatique ou apochromat est une version améliorée du doublet achromatique  pour assurer la correction des aberrations chromatique et sphérique.     L'achromat se limite à la correction des distances focales de deux faisceaux de longueurs d'onde   différentes.   L'apochromat permet de corriger les distances focales de trois longueurs d'onde différentes.   La dispersion résiduelle des couleurs est moindre que celle produite par un achromat, à ouverture   et distance focale équivalentes.  L'apochromat permet aussi de corriger les aberrations sphériques   sur deux longueurs d'onde, contre une longueur d'onde avec l'achromat.   L'apochromat est un assemblage de 3 lentilles permettant de  corriger les trajectoires de 3 faisceaux de longueurs d'onde différentes   Et aussi la variation de la distance focale en fonction de la longueur d'onde dans le  spectre du visible   La fab