David
If the toucam is at prime focus your magnification should be 25x not the 200-250x that you mentioned (Magnification at Prime Focus = Focal Lenght/50). Looking at the size of Mars in your image I would say this correct.
When imaging planets, image scale is an important factor, since you will be taking pictures of small targets (Mars etc) you will need to magnify these object in order to capture sufficient detail.
For imaging, magnification is a function of focal lenght and the focal lenght will determine image scale.
I you were to use a 5x Powermate with your setup you will end up with a focal lenght of 6250mm. Divide this by 50 and we end up with a magnification of 125x.
In terms of image scale we end up with about 0.18 arcsec per pixel.
This is a respectable image scale for your setup and you will find that you will record more detail.
Anthony
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Originally Posted by davidpretorius
thanks anthony, great explanation,
can you do me a favour and post your mars pic as it exactly seen in size. I have a 10" at 1250mm fl, no barlow The toucam at prime focus gives me around 200 - 250 x mag.
I would be keen to see how big your scope actually shows mars. I am only assuming you have made it bigger in photoshop.
The amount of detail you have is great.
With 200 x already, if i get a 5x televue. i will get 1000 X with the toucam at prime focus???
This is mars as i see it thru the toucam at prime focus
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