I don't know why I'm so stupid today. Crop factor question.

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Northoceanbeach
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I don't know why I'm so stupid today. Crop factor question.
5 months ago

Maybe its the rain, but for some reason my mind is toast.  I was looking at some manual focus contax lenses.  So I have a nex 7.

Lets say I put a 50mm old manual focus lens on it, one designed for full frame, on my camera it will be a 75mm because of the crop factor?

now let's say I put the e mount 50mm 1.8 on, the one designed for the nex.  It's still going to give me a 75mm focal length?

Because my camera has a 1.5 crop factor.  But does that affect lenses made for it like the sel50/1.8? Because if you put the sel50 on an A7, it crops it down and you don't get the whole picture, because it was designed for an aps-c sensor.

So why then would the sel50 on my nex not give me a true 50mm focal length, and it is only when I put on a lens designed for full farm, that it crops it and you multiply by 1.5.  Am I explaining this well?

 Northoceanbeach's gear list:Northoceanbeach's gear list
Panasonic Lumix DMC-TS5 Sony Alpha NEX-7 Nikon 1 J1 Sony E 18-55mm F3.5-5.6 OSS Sony E 50mm F1.8 OSS +5 more
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