Eyepieces vs Camera

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FerrariMX5
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Eyepieces vs Camera

#1

Post by FerrariMX5 »

Everyone,

I'm trying to educate myself, but there are concepts that keep slipping away from me.
Eyepieces are easy to understand: how they magnify (so to speak) and how important the field of view is.

12.5mm on an 8" SCT = 160 times
While a 25 mm = 80 times

Cameras do not magnify the image, they only record what they see, don't they?
I thought I understood the math behind the sensor.
I simply don't, so I will ask.
If I attach a full framed camera to the Telescope, how would I figure the equivalent magnification?
I thought I could find an equivalent statement that would say the image I recorded with this camera on this 8" SCT telescope is equivalent to a 12.5mm eyepiece (or a 25mm, or a 32mm)

I know they are different and we cannot actually say that this camera, mounted on this Telescope, is equal to the image you would see with a certain power eyepiece.
Yet, I find myself asking that question.

I have been watching youtube videos where they have recorded Jupiter, the Moon, Saturn and have no clue as to the Eyepiece I will need and what I should expect.
I've been asked if that is the image my telescope will produce when I get the eyepieces. (Ordered from California Supplier)

All I can say, is I hope so, but I have no clue (Yet),,,

All I know is the magnification of the eyepieces, but have no clue about the videos we have been watching (Could be better, could be smaller)
In a week I will know what to expect,

Thank you in advance,

Tony
:sprefac: Vintage Celestron 8 2002.
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Re: Eyepieces vs Camera

#2

Post by JayTee »

We use a simple number to measure rough magnification with a camera sensor. That number is the diagonal measure of the sensor in millimeters. Divide that number into your focal length and you will get a rough equivalent of the magnification.

Cheers,
JT
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FerrariMX5
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Re: Eyepieces vs Camera

#3

Post by FerrariMX5 »

Thank you very much!

Don't know why I was having such a hard time, but now I understand again.

Cannot wait for clear skies and USPS to deliver my order!

TOny
:sprefac: Vintage Celestron 8 2002.
The speed of light: 299,792,458 Meters per Second
The speed of time: One Second per Second.
The speed of gravity: 299,792,458 Meters per Second
Warp 10: Touching all points in the universe at the same time.
Welcome to the Universe (Its bigger than you thought).
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