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- Flange_focal_distance abstract "For an interchangeable lens camera, the flange focal distance (FFD) (also known as the flange-to-film distance, flange focal depth, flange back distance (FBD), flange focal length (FFL), or register, depending on the usage and source) of a lens mount system is the distance from the mounting flange (the metal ring on the camera and the rear of the lens) to the film plane. This value is different for different camera systems. The range of this distance which will render an image clearly in focus within all focal lengths is usually measured in hundredths of millimeters and is known as the depth of focus (not to be confused with the similarly named depth of field).This distance influences whether a lens from one system can be mounted with an adaptor to a camera body of another system. In order to produce an adaptor that permits focus to infinity without corrective optics, the flange-to-film distance the lens is designed for must be greater than that of the camera body it is to be adapted to, giving room for the adaptor. Camera systems with a large flange-to-film distance have lenses that can be widely adapted, while those with a small flange-to-film distance can take adaptors for many types of lenses.If the difference is small, other factors, such as the diameters of the mounting flanges of the two systems, come into play as well. Lens adapters are generally easier to make when the camera body has a large lens mount.Standard mounts include:Flange focal distance is one of the most important variables in a system camera, as lens seating errors of as little as 0.01 mm will manifest themselves critically on the imaging plane and focus will not match the lens marks. Professional movie cameras are rigorously tested by rental houses regularly to ensure the distance is properly calibrated. The most common mount is the Arri PL mount with an FFD of 52.00 mm. The Russian OCT-19 has an FFD of 61.00 mm. C-mount (Bolex, éclair and Bell & Howell) has 17.52 mm. Any discrepancies between eye focus and measured focus which manifest themselves across a range of distances within a single lens may be collimation error with the lens, but if such discrepancies occur across several lenses, it is more likely to be the flange focal distance or the groundglass (or both) which are mis-set.Due to research on optimal flange focal distance settings, it is currently considered better for flange focal distance to be set to somewhere within the film's emulsion layer, rather than on the surface of it. Therefore, the nominal flange focal depth will be equivalent to the distance to the groundglass, whereas the actual flange focal depth to the aperture plate will in fact be ~0.02 mm less.".
- Flange_focal_distance thumbnail Flange_Focal_Length_(2_types_camera).PNG?width=300.
- Flange_focal_distance wikiPageExternalLink mounts.htm.
- Flange_focal_distance wikiPageID "3096851".
- Flange_focal_distance wikiPageLength "18417".
- Flange_focal_distance wikiPageOutDegree "165".
- Flange_focal_distance wikiPageRevisionID "707438931".
- Flange_focal_distance wikiPageWikiLink 2%22_TV_bayonet_mount.
- Flange_focal_distance wikiPageWikiLink Arri_PL.
- Flange_focal_distance wikiPageWikiLink Arri_bayonet.
- Flange_focal_distance wikiPageWikiLink Arri_standard.
- Flange_focal_distance wikiPageWikiLink 3%22_TV_bayonet_mount.
- Flange_focal_distance wikiPageWikiLink Balda_Baldamatic_III.
- Flange_focal_distance wikiPageWikiLink Bell_&_Howell.
- Flange_focal_distance wikiPageWikiLink Bolex.
- Flange_focal_distance wikiPageWikiLink Braun_Colorette_II.
- Flange_focal_distance wikiPageWikiLink C_mount.
- Flange_focal_distance wikiPageWikiLink Canon_EF-M_lens_mount.
- Flange_focal_distance wikiPageWikiLink Canon_EF-S_lens_mount.
- Flange_focal_distance wikiPageWikiLink Canon_EF_lens_mount.
- Flange_focal_distance wikiPageWikiLink Canon_FD_lens_mount.
- Flange_focal_distance wikiPageWikiLink Canon_FL_lens_mount.
- Flange_focal_distance wikiPageWikiLink Carl_Braun_Camera-Werk.
- Flange_focal_distance wikiPageWikiLink Category:Photography_equipment.
- Flange_focal_distance wikiPageWikiLink CineAlta.
- Flange_focal_distance wikiPageWikiLink Collimation_error.
- Flange_focal_distance wikiPageWikiLink Contax.
- Flange_focal_distance wikiPageWikiLink Y-mount.
- Flange_focal_distance wikiPageWikiLink Contax_G.
- Flange_focal_distance wikiPageWikiLink Contax_N-mount.
- Flange_focal_distance wikiPageWikiLink DKL-mount.
- Flange_focal_distance wikiPageWikiLink D_mount.
- Flange_focal_distance wikiPageWikiLink Depth_of_field.
- Flange_focal_distance wikiPageWikiLink Depth_of_focus.
- Flange_focal_distance wikiPageWikiLink Eclair_(company).
- Flange_focal_distance wikiPageWikiLink Epson_EM-mount.
- Flange_focal_distance wikiPageWikiLink Exakta.
- Flange_focal_distance wikiPageWikiLink Four_Thirds_system.
- Flange_focal_distance wikiPageWikiLink Fujica_X-mount.
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- Flange_focal_distance wikiPageWikiLink Graflex_Graphic_35_Electric.
- Flange_focal_distance wikiPageWikiLink Hasselblad_1000F_&_1600F.
- Flange_focal_distance wikiPageWikiLink Hasselblad_2000_&_500.
- Flange_focal_distance wikiPageWikiLink Iloca_Electric.
- Flange_focal_distance wikiPageWikiLink Kodak.
- Flange_focal_distance wikiPageWikiLink Kodak_Retina.
- Flange_focal_distance wikiPageWikiLink Kodak_Retina_Reflex.
- Flange_focal_distance wikiPageWikiLink Konica.
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- Flange_focal_distance wikiPageWikiLink Krasnogorsky_Zavod.
- Flange_focal_distance wikiPageWikiLink Leica_CL.
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- Flange_focal_distance wikiPageWikiLink Leica_R_bayonet.
- Flange_focal_distance wikiPageWikiLink Leica_SL-mount.
- Flange_focal_distance wikiPageWikiLink Lens_mount.
- Flange_focal_distance wikiPageWikiLink List_of_Konica_Minolta_A-mount_lenses.
- Flange_focal_distance wikiPageWikiLink List_of_Minolta_A-mount_lenses.
- Flange_focal_distance wikiPageWikiLink List_of_Sony_A-mount_lenses.
- Flange_focal_distance wikiPageWikiLink List_of_Sony_E-mount_lenses.
- Flange_focal_distance wikiPageWikiLink M39_lens_mount.
- Flange_focal_distance wikiPageWikiLink M42_lens_mount.
- Flange_focal_distance wikiPageWikiLink Mamiya.
- Flange_focal_distance wikiPageWikiLink Mamiya_RB67.
- Flange_focal_distance wikiPageWikiLink Mamiya_RZ67.
- Flange_focal_distance wikiPageWikiLink Mamiya_Z.
- Flange_focal_distance wikiPageWikiLink Micro_Four_Thirds_system.
- Flange_focal_distance wikiPageWikiLink Mini_T-mount.
- Flange_focal_distance wikiPageWikiLink Minolta_A-mount_system.
- Flange_focal_distance wikiPageWikiLink Minolta_CLE.
- Flange_focal_distance wikiPageWikiLink Minolta_SR-mount.
- Flange_focal_distance wikiPageWikiLink Minolta_Vectis_S_series.
- Flange_focal_distance wikiPageWikiLink Movie_camera.
- Flange_focal_distance wikiPageWikiLink Nikon_1-mount.
- Flange_focal_distance wikiPageWikiLink Nikon_F-mount.
- Flange_focal_distance wikiPageWikiLink Nikon_S-mount.
- Flange_focal_distance wikiPageWikiLink OCT-19.
- Flange_focal_distance wikiPageWikiLink Olympus_Corporation.
- Flange_focal_distance wikiPageWikiLink Olympus_OM_system.
- Flange_focal_distance wikiPageWikiLink Olympus_Pen_F.
- Flange_focal_distance wikiPageWikiLink PV_mount.
- Flange_focal_distance wikiPageWikiLink Panavision.
- Flange_focal_distance wikiPageWikiLink Pentacon_Six.
- Flange_focal_distance wikiPageWikiLink Pentaflex_(16_mm_cameras).
- Flange_focal_distance wikiPageWikiLink Pentax_645.
- Flange_focal_distance wikiPageWikiLink Pentax_6×7.
- Flange_focal_distance wikiPageWikiLink Pentax_Auto_110.
- Flange_focal_distance wikiPageWikiLink Pentax_K-mount.
- Flange_focal_distance wikiPageWikiLink Pentax_Q_series.
- Flange_focal_distance wikiPageWikiLink Photographic_film.
- Flange_focal_distance wikiPageWikiLink Praktica_B-mount.
- Flange_focal_distance wikiPageWikiLink Red_Digital_Cinema_Camera_Company.
- Flange_focal_distance wikiPageWikiLink Rollei_SL66.
- Flange_focal_distance wikiPageWikiLink Rollei_SLX.
- Flange_focal_distance wikiPageWikiLink Samsung_NX-mount.
- Flange_focal_distance wikiPageWikiLink Sigma_SA-mount.
- Flange_focal_distance wikiPageWikiLink 2%22_TV_bayonet_mount.
- Flange_focal_distance wikiPageWikiLink Sony_Alpha.
- Flange_focal_distance wikiPageWikiLink Sony_E-mount.
- Flange_focal_distance wikiPageWikiLink Start_(camera).