Here is the another one !!!

boothee · Post by **boothee** » Sun Apr 09, 2006 8:03 pm

Not so bad but I think not so good.

My picture looks blur. Is that about focus? Processing? Telescope? Camera?

boothee

Post by **rcj** » Mon Apr 10, 2006 9:40 am

hi boothee,
are you coupling the camera directly to the telescope without use of negative eyepiece projection? How was the seeing when this picture was taken? How many stacks did you do this time? It could be focus issue as well...do you focus on the limb of the moon?

wucheeyiun · Post by **wucheeyiun** » Mon Apr 10, 2006 11:26 am

i face this " blur " pictures too @ hi telepower,
After i increase the ISO sensitivity of the camera to 1600, i raised the speed to at least 1:250, The pictures are indeed clearer.
I get the best pic when i set speed to 1:500.

Post by **rcj** » Mon Apr 10, 2006 11:31 am

i see....but i think he is using a webcam here...nevermind, we will wait for his response...

boothee · Post by **boothee** » Mon Apr 10, 2006 1:50 pm

rcj wrote:hi boothee,
are you coupling the camera directly to the telescope without use of negative eyepiece projection? How was the seeing when this picture was taken? How many stacks did you do this time? It could be focus issue as well...do you focus on the limb of the moon?

Yes! Directly to the telescope/prime focus without any filter. Should I put my filter again? I use homemade IR pass filter made from exposed film. Seeing was very good but it used to become very good image after stacked. But not this image.

I can't do avi with many frames as I don't have driven mount. I used to capture 20 frames avi and take only 10 best frames from it. ;O)

No. I used to find a crater & focus on it. Focus on the limb would be much better?

Thanks,

;O)
boothee

Post by **rcj** » Mon Apr 10, 2006 1:55 pm

here's a tip, it may help in achieving better focus... aim at a star, and looking at your computer to focus with the webcam... take two strings or fishing line and place infront of the telescope aperture (Crosshair pattern). If the star is not in focus, you will see double spikes. When in focus, you will see four diffraction spikes only. Once this is done, move over to the moon to image. Alternatively, sometimes i find it easier focusing on the limb rather then topographical features on the moon...perhaps the edge makes it easier to discern if sharp focus in on...maybe you could try that too...

boothee · Post by **boothee** » Mon Apr 10, 2006 2:05 pm

rcj wrote:here's a tip, it may help in achieving better focus... aim at a star, and looking at your computer to focus with the webcam... take two strings or fishing line and place infront of the telescope aperture (Crosshair pattern). If the star is not in focus, you will see double spikes. When in focus, you will see four diffraction spikes only. Once this is done, move over to the moon to image. Alternatively, sometimes i find it easier focusing on the limb rather then topographical features on the moon...perhaps the edge makes it easier to discern if sharp focus in on...maybe you could try that too...

Woh! That is new for me! Thanks for your kind suggestion! I'll surely try tonight.

Thanks,

Clear Skies!!!

boothee