20mm on a M mount kit same as 20mm on full frame Q

Discussion in 'Beginner Questions' started by Caladina, Apr 6, 2020.

  1. Caladina

    Caladina Well-Known Member

    Joined:
    Jan 30, 2020
    Messages:
    1,780
    Equipment:
    Canon M50
    Canon 18-45mm m, Canon 18-150mm m, Canon 55-200mm m, Canon 22mm m, Canon 28mm m macro,
    Sigma 100-400c ef, Sigma 18-35mm art ef,
    7artisans 7.5mm m, Laowa 100mm macro ef, laowa 9mm zeroD m, Vintage M42 Lenses:
    Ashi Super - Takumar 1.8 / 55mm,
    i know about the x1.6 on my canon for non native lenses.
    my question is does a native M mount kit lens designed for canon crop sensor still need to have the 1.6x applied to it or is that taken into account for in production

    reason i'm asking is i have a couple of zoom lenses for my M50 and want to use them to determine what ef equivalent to get when i decide on the mm i need for a situation
     
    Caladina, Apr 6, 2020
    #1

  2. johnsey

    johnsey Site Moderator Staff Member Site Supporter

    Joined:
    Apr 21, 2017
    Messages:
    2,133
    Location:
    Fargo, ND
    Equipment:
    5dMk4, 5dsR, 5dMk2, 20D, 70-200 2.8L IS, 100mm 2.8 Macro USM, 50mm 1.4, 85mm 1.8, 17-40mm 4.0L, TS-E 24mm 3.5L II, Rokinon 14mm 2.8; Pixma Pro-100
    Your M50 has an APC sized sensor so any full frame lens will need to consider that same 1.6 multiplication factor. M Mount lens just like Ef -s are designed for the smaller sensor and will behave similarly regarding focal distance. The multiplcation factor is simply the comparison of the lens size to the sensor size.

    A 50mm lens on full frame does not actually magnify any closer on any camera body, the APC sensor is only about 2/3 the size of full frame so it crops the 50mm glass down giving a field of view similar to what a 75mm would on a full frame.
     
    johnsey, Apr 6, 2020
    #2

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