Det er greit å vite litt om registeravstand til sensor/ filmflate dersom man ønsker å tilpasse
objektiver med en annen fatning. Dersom registeravstanden er lengre eller lik registeravstanden på ditt eget systemkamera innebærer dette at man mister uendelig fokus dersom adapteret ikke inneholder glass som korrigerer avstanden. Glass i et adapter vil vanligvis forringe kvaliteten på bildene du tar gjennom objektivet.
| System |
Objektiv fatning |
Register (mm) |
| Pentax Q | bayonett | 9.2 |
| D-mount | 0.625″×32tpi gjenge | 12.29 |
| C-S mount | 1″×32tpi gjenge | 12.526 |
| Bolex H8RX | 1″×32tpi gjenge | 15.31 |
| Nikon 1 | bayonett | 17 |
| C-mount | 1″×32tpi gjenge | 17.526 |
| Argus | 33mm gjenge | 17.7 |
| Fujifilm XF | bayonett | 17.7 |
| Sony E | bayonett | 18 |
| Micro Four Thirds | bayonett | 19.25 |
| Canon EX1/2 VL camcorder | bayonett | 20 |
| Bolex | breech | 23.22 |
| Samsung NX | bayonett | 25.5 |
| Pentax Auto 110 | bayonett | 27 |
| Leica M | bayonett | 27.95 |
| Konica Hexar RF | bayonett | 28 |
| Canon screw | M39x1 gjenge | 28.8 |
| Leica screw | M39x26tpi | 28.8 |
| Narcissus | M24x1 gjenge | 28.8 |
| Olympus Pen F | bayonett | 28.95 |
| Contax G1 | bayonett | 29 |
| Hasselblad Xpan | bayonett | 34.27 |
| Contax RF | dual bayonet | 34.85 |
| Nikon rangefinder | bayonett | 34.85 |
| Alpa | bayonett | 37.8 |
| 4/3 System digital | bayonett | 38.58 |
| Aaton | bayonett | 40 |
| Konica Autoreflex | bayonett | 40.5 |
| Konica F | bayonett | 40.5 |
| Miranda dual bayonet/screw | bayonett/skrufatning | 41.5 |
| Canon R/FL/FD | breech/bayonett | 42 |
| Wrayflex | M41.2×26tpi | 42.05 |
| Altix | breech lock | 42.5 |
| Yashica Pentamatic | bayonett | 43 |
| Rectaflex | bayonett | 43.4 |
| Fujica X | bayonett | 43.5 |
| Petriflex | breech lock | 43.5 |
| Minolta SR | bayonett | 43.72 |
| Canon EOS | bayonett | 44 |
| Paxette | M39x1 gjenge | 44 |
| Praktiflex | M40x1 gjenge | 44 |
| Sigma SA | inner gjenge | 44 |
| Praktica | bayonett | 44.4 |
| Praktica | bayonett | 44.4 |
| Argus | bayonett | 44.45 |
| Minolta AF | bayonett | 44.6 |
| Rolleiflex SL35 | bayonett | 44.6 |
| Sony Alpha | bayonett | 44.6 |
| Exakta/Topcon | bayonett | 44,7 |
| Topcon RE | bayonett | 44.7 |
| Voigtländer Bessamatic | bayonett | 44.7 |
| Kodak Retina Reflex | bayonett | 44.7 |
| Zenith 3M | M39x1 gjenge | 45.2 |
| Asahiflex | bayonett | 45.46 |
| K-mount | bayonett | 45.46 |
| M42 screw | M42x1 gjenge | 45.46 |
| Pentax/Praktica | M42x1 gjenge | 45.46 |
| Pentax K | bayonett | 45.46 |
| Contax/Yashica | bayonett | 45.5 |
| Contax S | M42×1 gjenge | 45.5 |
| Mamiya ZE | bayonett | 45.5 |
| Pentina | breech lock | 45.5 |
| Petri | bayonett | 45.5 |
| Ricoh | breech mount | 45.5 |
| Contarex | bayonett | 46 |
| Olympus OM | bayonett | 46 |
| Nikon F | bayonett | 46.5 |
| Leica R | bayonett | 47 |
| B4 | bayonett | 48 |
| Contax N | bayonett | 48 |
| Eclair | bayonett | 48 |
| HDTV 2/3″ | B4 bayonett | 48 |
| Icarex | breech lock | 48 |
| Praktina | breech lock | 50 |
| Adaptall | bayonett | 50.7 |
| Arriflex | bayonett | 52 |
| Arri PL | breech lock | 52 |
| Arri Maxi PL | breech lock | 52 |
| T2 mount | M42x0.75 gjenge | 55 |
| Topcon IC1 | bayonett | 55 |
| Panavision PV | breech lock | 57.15 |
| Mamiya 7/7II | bayonett | ∼60 |
| Mitchell BNCR | breech lock | 61.468 |
| Hasselblad H System | bayonett | 61.63 |
| Mamiya 645 | bayonett | 63.3 |
| Leitz Visoflex II, III | Leica M bayonett | 68.8 |
| Bronica ETRS | bayonett | 69 |
| Pentax 645 | bayonett | 70.87 |
| Rolleiflex SLX | bayonett | 74 |
| Exakta 66 | breech lock | 74.1 |
| Kiev 60/Kiev Six | breech lock | 74.1 |
| Pentacon 6 | breech lock | 74.1 |
| Zenit 80 | multi start gjenge | 74.1 |
| Hasselblad 500/2000 | bayonet | 74.9 |
| Kilarscope | 78.8 | |
| Kowa Six/Super 66 | breech lock | 79 |
| Hasselblad/Kiev88 | multi start gjenge | 82.1 |
| Pentax 6×7 | bayonett | 84.95 |
| Leitz Visoflex I | M39x26tpi | 91.3 |
| Kilarflex | 92.3 | |
| Zeiss Ikon Panflex | 99.35 | |
| Novoflex | 100 | |
| Bronica S2A | bayonett/57×1 gjenge | 101.7 |
| Mamiya RZ | bayonett | 105 |
| Mamiya RB | bayonett | 112 |