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October 18th sun

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#1 Andrev

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Posted 18 October 2012 - 06:14 PM

Hi.

Finally a clear day. I've been able to do two sketches at 300X before the seeing degrade drastically.

Andre.

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#2 JeanB

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Posted 18 October 2012 - 07:45 PM

Terrific sketches André! You have all my admiration for the details and time you put in your work!

Jean

#3 Ibmelrod

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Posted 18 October 2012 - 10:14 PM

Wonderful work Andre.

#4 frank5817

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Posted 19 October 2012 - 01:34 AM

Andre,

Four excellent sketches.

Frank :)

#5 Andrev

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Posted 19 October 2012 - 06:38 AM

Thank you so much guys. Its very appreciated and encourage me to continue.

I did some tests yesterday and I have to adjust my stencils because the circle representing the eyepiece's FOV is much larger when looking at the eyepiece than the one I have on my 8" 1/2 X 11" sheet of paper. So the drawing area on my sheet is smaller than the actual image even at 50º FOV and certainly worst if I use a 82º FOV eyepiece.

Thanks.

Andre.

#6 niteskystargazer

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Posted 19 October 2012 - 02:04 PM

Andre,

Very good sketches of the Sun :cool:.

CS,KLU,

:thanx:,

Tom

#7 Special Ed

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Posted 20 October 2012 - 02:13 PM

Andre,

Very well done. You get some remarkably good views with your scope/eyepiece setup. 152mm of aperture is probably close to optimal for solar observing.

One suggestion--you might want to take note of how much of a curve you're giving the solar limb in your closeup drawings. The tendency is to put more curve than is actually there.

#8 Andrev

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Posted 22 October 2012 - 08:54 AM

Thank you TOM.

Michael.

I'm not sure to get your point ? You find the closeup curve is too much ? Certainly it represent what I see in the eyepiece actually. I have to redo my stencils of those with less magnification.

Andre.

#9 Special Ed

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Posted 24 October 2012 - 05:13 AM

Yes, either the curve is a little too much or the prom a little too tall in relation to the limb curve. Usually the tendency is to make the proms bigger than they actually are in full or almost full disk sketches or make the curve a little too pronounced in closeups.

I know you are trying to render a realistic view. Your drawings are quite good and if the proportions are off at all, it's not by much. I could well be wrong--it's just the way it looks to my eye.

#10 Andrev

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Posted 24 October 2012 - 06:55 AM

Michael.

Today I'll try new stencils where the curve is less prononced.

Andre.






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