APS-C to FF (have I got this right?)

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xroxer Regular Member • Posts: 125
APS-C to FF (have I got this right?)

So I am moving to FF from my Canon 70d, mostly for something new.  I am learning about crop factor and field of view equivalents....etc.  Let me know if I have this correct or not.

My 135mm f2 is actually performing like 218.7mm f3.2

To see how it will look on a FF I would need to put a 83.3mm f1.25 on my 70d

Also, my 11-16mm f2.8 , despite being APS-C only, is still a 35mm focal length and thus is only performing like 17.8mm - 25.9mm f4.54

 xroxer's gear list:xroxer's gear list
Canon EOS 70D Canon EF 135mm F2L USM Canon EF-S 55-250mm f/4-5.6 IS II Canon EF-S 10-18mm F4.5–5.6 IS STM Sigma 24mm F1.4 DG HSM Art +1 more
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Canon EOS 70D
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