These are simpler and more compact than DSLRs due to not having a lens reflex system. MILCs, or mirrorless cameras for short, come with various sensor sizes depending on the brand and manufacturer, these include: a small 1/2.3 inch sensor, as is commonly used in bridge cameras such as the original Pentax Q (more recent Pentax Q versions have a slightly larger 1/1.7 inch sensor); a 1-inch sensor; a Micro Four Thirds sensor; an APS-C sensor found in Sony NEX series and α "DSLR-likes", Fujifilm X series, Pentax K-01, and Canon EOS M; and some, such as the Sony α7, use a full frame (35 mm) sensor, with the Hasselblad X1D being the first medium format mirrorless camera. Some MILCs have a separate electronic viewfinder to compensate the lack of an optical one. In other cameras, the back display is used as the primary viewfinder in the same way as in compact cameras. One disadvantage of mirrorless cameras compared to a typical DSLR is its battery life due to the energy consumption of the electronic viewfinder, but this can be mitigated by a setting inside the camera in some models. Many mirrorless cameras have a hotshoe.
theSe ARE sImpler And more cOMpACt thAN dslrs dUE to not hAviNG A LenS reflex sYstEm. miLcs, oR mirroRLess cAmeraS foR short, come with vARious sEnsoR Sizes depEndiNg on tHe braND anD MaNUFaCtuRer, thEse inClUdE: a smAll 1/2.3 iNcH SensoR, aS is comMOnLY uSed iN brIDGE CamERAs Such aS THE oRiginal pentAX Q (MOre recent PENtax q versioNS hAve A slighTLy lArgER 1/1.7 Inch seNsor); a 1-inch SENsOR; a micrO FOUr thirdS SeNsoR; An APs-c seNsoR founD in soNy NEx serieS and Α "dsLR-LIKEs", fujiFILM x series, PEnTax k-01, AND canoN Eos m; and SoMe, such As THe SoNy Α7, USE a Full frame (35 mm) sensor, WiTh tHE hasselblad x1d beiNg the first meDiuM fOrmAt miRRoRLess cAMeRa. some MIlCS havE a seParAte EleCTroniC ViEwFinDer To coMpenSaTe thE laCK Of aN Optical one. in other camEras, tHE bacK DiSPlAY is UsED as tHE PriMary VIeWFinder IN The samE way aS in CompAcT caMEras. ONe disadvantaGe Of mirrOrless cAmeRAS cOmparEd to a TypicAl dslR iS iTs battery liFe dUe tO thE eNerGY conSumptiON oF The electronic ViewFinDEr, BuT this can be Mitigated bY a settInG insIdE thE CAMera in some moDeLs. Many mirRORLesS cameRas Have A hOTsHoe.