Timeline for How to compare the focal length of a 50mm prime lens with the default lens of a point and shoot camera?
Current License: CC BY-SA 3.0
14 events
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| Feb 22, 2012 at 16:38 | comment | added | mattdm | So, your fully-raked-out lens is equivalent to 392mm on a full-frame sensor. A 1.5x crop sensor gives the same field of view as that at 392mm divided by 1.5 — about 261mm. The crop factor is used to give a common reference point, and to compare, you convert both. | |
| Feb 22, 2012 at 16:31 | comment | added | Aquarius_Girl | and see this "football' photograph: digitalreview.ca/content/… They say they were taken on cropped sensor D5100. So, how many km do you think we'll have to step back to get that complete scene? | |
| Feb 22, 2012 at 16:24 | comment | added | Aquarius_Girl | So, it means that fully raked out lens on my camera is equlvalent to that 50mm (on cropped sensor) ? | |
| Feb 22, 2012 at 16:22 | comment | added | mattdm | Absolutely. It throws the exact same light I gave in the first paragraph of my answer above. :) The crop factor is 5.6, and 70 times 5.6 is 392. | |
| Feb 22, 2012 at 16:14 | comment | added | Aquarius_Girl |
Mat, see this: while its powerful 14x optical zoom provides a 392mm maximum equivalent focal length, from here: dpreview.com/news/2010/2/8/canonpowershotsx210 Is that related? Does that throw light on anything? That's the camera.
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| Feb 22, 2012 at 15:14 | comment | added | mattdm | I'm not sure what the 1m is all about. | |
| Feb 22, 2012 at 15:14 | comment | added | mattdm | @Anisha: I think that 70mm is probably the real 70mm, pre-multiplication. Very few point and shoot cameras these days have a maximum equivalent focal length of 70mm. | |
| Feb 22, 2012 at 14:37 | comment | added | Aquarius_Girl | Since it is mentioned on the lens of my PS that max zoom is 70mm, so I raked out the lens totally. And this is ridiculous, I don't think I will be able to use this lens on anything else other than portraits and still life. I was thinking of using it for landscapes and garden scenes!! :( :( :banghead: | |
| Feb 22, 2012 at 13:43 | comment | added | Aquarius_Girl | Mat, just saw that my camera reads it in "cm", and maximum is "1m". So, "1m" should be considered 50mm on a "cropped sensor" . | |
| Feb 22, 2012 at 12:56 | comment | added | mattdm | Yes, because that's converting both to the same "reference" format. | |
| Feb 22, 2012 at 12:33 | comment | added | Aquarius_Girl | Hey, if the camera calls it 75mm, does it mean that I have to set it to 75mm to get a feel of 50mm prime? | |
| Feb 22, 2012 at 12:23 | comment | added | Aquarius_Girl | So, actually according to that camera I have to zoom upto 13.4mm to get a feel of 50mm? Nice, I'll try and see. | |
| Feb 17, 2012 at 15:04 | history | edited | mattdm | CC BY-SA 3.0 |
added 153 characters in body
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| Feb 17, 2012 at 14:30 | history | answered | mattdm | CC BY-SA 3.0 |