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Re: 140mm v 100mm = 'big difference'
In reply to rattymouse,
6 months ago
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rattymouse wrote:
DS21 wrote:
Mark H wrote:
rattymouse wrote:
DS21 wrote:
rattymouse wrote:
The XF1 has 25mm at the wide end and f/1.8. I would take that over 140mm, which is useless to me (not much different from 100mm). XF1 also has a much higher useable ISO.
What about the fancy and expensive part? 140 mm is not much different for you, but for me it is a big difference. F1.8 is just a teaser on XF1. F200 was a practical, utilitarian compact with money spent where it matters, not on a stupid lens contraption which means having to use the small camera with two hands always.
A quick crop and I have 140mm. Very easy.
'A quick crop' and you can have 1,000mm if you like - but it's not a compelling justification.
140mm versus 100mm is a big difference - it's the difference equivalent to doubling/halving the mega-pixel count of an sensor/image.
Wow, I was not even aware that it amounts to that much difference in MP. It just seems very substantial to me comparing the FOV directly, I just did that recently in a store comparing the G15 (also 140 mm) with XF1.
(140-100)/100 *100= 40% more focal length.
Math is such a lost skill.
You can crop your way to 140mm, you can't from 28 to 25mm.
(28-25)/28*100= 10.7% more focal length on the wide end.
--
DISCLAIMER: The text written herein is meant to provide the opinions and/or suggestions of the author. No statement herein is meant to be considered law of the land, representative of any party or group, and or a quote from any party or group. Neither is any statement in the contained text meant to be taken as scripture, doctrine, or all encompassing of an entire populous or any groups or individuals therein.
With cropping and calculating lost MP you are comparing surface area difference, not FL ratio. Math is such a lost skill.
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