10-04-2016 12:27 PM
When trying to resolve detail, such as a chart used for eye exams, at a distances of 1/4 to 1/2 mile, which is better to use, a camera such as the SX50HS with a long optical focal length, or one such as the G3 X with the larger 1" sensor? I am interested in compact cameras, not DSLRs.
10-04-2016 01:08 PM
@BigSkyGuy wrote:When trying to resolve detail, such as a chart used for eye exams, at a distances of 1/4 to 1/2 mile, which is better to use, a camera such as the SX50HS with a long optical focal length, or one such as the G3 X with the larger 1" sensor? I am interested in compact cameras, not DSLRs.
For still subjects at a long distance my choice would be the SX50HS.
10-04-2016 02:33 PM
I would use math.
Knowing the focal length you know the angle of view.
Knowing the number of pixels in the sensor you know the pixels per degree. The one that has the most pixels per degree is the one you want.
The SX50 HS has a 2 degree field of view at "1200 mm"" and 4000 pixels for 2000 pixels per degree
The G3X has a 4 degree field of view at "600 mm" and 5472 pixels for 1368 pixels per degree.
But while the SX50 has better resolution on paper, the G3X might have better optics and better low light performance.
10-04-2016 02:36 PM
10-04-2016 02:38 PM
You might see if you can rent it to do some actual tests.
10-04-2016 02:53 PM
10-04-2016 04:08 PM
Atmospheric haze is going to degrade whatever you use.
10-05-2016 06:54 PM
Camera shake could be an issue at the longer focal lengths, too. You're gonna need a fast shutter and/or steady hands, no matter which camera you choose..
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