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June 1st, 2014, 01:04 PM
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#1 |
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Regular Crew
Join Date: Mar 2006
Location: Las Vegas, NV
Posts: 84
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cropped body and lenses
I understand the concept you get a lens based of what it really is after factoring in the crop factor. My question is, if I get a 30mm wide angle lens to get as close as possible 50mm on my 70d, will the fact that its a wide angle lens distort the image at all? Or if I put that 30mm on the 70d next to a 50mm on a full frame, they will look pretty close to the same?
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June 1st, 2014, 01:50 PM
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#2 |
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Trustee
Join Date: Dec 2012
Location: Crookston, MN
Posts: 1,353
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Re: cropped body and lenses
Any distortion is likely to be the result of perspective, rather than cropping or lens angle itself. Just being closer or farther away from a subject will change the point of view, and distance between objects.
As far as distortion, I suppose it depends on the lens. My Rokinon 14mm, which looks very noticeably fisheyed on my full frame 5D mark II, really does look just like a 20mm on our crop factor. Whereas, I'm sure, a lens MADE for crop-factor only might still give wide-angle distortion. |
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June 1st, 2014, 06:03 PM
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#3 | |
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Trustee
Join Date: Oct 2012
Location: Sydney, Australia
Posts: 1,149
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Re: cropped body and lenses
Quote:
1. 30mm lenses don't usually have noticeable barrel distortion anyway. It's worth looking into lens reviews of whatever particular lens you're asking about. But I've got a feeling you don't really have to worry about distortion until you reach low 20s and below. 2. in fact, using full frame lenses with distortion on crop sensor cameras is more likely to reduce distortion, if anything, because the sensor effectively crops out the distorted edges. That's how I understand these things work anyway... 3. 30 on crop vs 50 on full frame -- they will look pretty close to the same, but they're not going to be the same. Or, to put it another way: same field of view, but different perspective. Similar to using a 200mm on a person for a close-up, or stepping close with a 35 -- same field of view, but perspective different. Like I said, I might be completely wrong about the above, but anyway... |
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June 1st, 2014, 06:15 PM
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#4 |
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Trustee
Join Date: Oct 2012
Location: Sydney, Australia
Posts: 1,149
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Re: cropped body and lenses
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