A5100 and FE 70-300mm

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peter826 Regular Member • Posts: 161
A5100 and FE 70-300mm

I have an RX100 Mark 1 I rarely use anymore.  A friend wants to trade me for an A5100 body.

I don't know that I have much use for the 5100 either, but I had one thought.  I could pair it with my FE 70-300mm to get an effective 450mm reach at 24 megapixels, correct?  I can shoot my A7r in APS-C mode with this lens and get to 450mm, but it drops to around 15 megapixels because it's effectively a crop.

Does my math make sense here?  I wouldn't use this combo often, but it does intrigue me.

 peter826's gear list:peter826's gear list
Sony RX100 Sony RX1 Sony Alpha a7R Sony 16-35mm F2.8 ZA SSM Carl Zeiss Vario-Sonnar T* Rokinon 14mm F2.8 IF ED MC
Sony a5100 Sony Alpha a7R
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