1st Light with my New China WebCam

CCD vs Film? Lots of time vs no patience? Alright, this is your place to discuss all the astrophotography what's and what's not. You can discuss about techniques, accessories, cameras, whatever....just make sure you also post some nice photos here too!
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boothee
Posts: 499
Joined: Fri Apr 08, 2005 5:38 pm
Location: Myanmar

1st Light with my New China WebCam

Post by boothee »

Hi all,

I've bought a new China Made WebCam which looks much better than the previous one.
After testing, I feel like really good. But it forced me to capture 4x pics {2x(2x Barlow)}. Can't focus without barlow . :mrgreen:

Bad thing is I can't adjust the exposure manually. So brightness changing all the times. Attached the test pictures. Have a look!

Dorsa Smirnov taken on yesterday. Others this evening(Recently).
I can't believe I've captured RIMA ARIADAEUS.

Image

Image

Image

8-)
boothee
1150mm, 254mm, Newtonion Reflector on EQ5 Mount with dual axis DK3 drive, QHY5 Camera, Canon 300D + Kit Lens, Yangon, Myanmar.
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simranjits
Posts: 83
Joined: Mon Jan 15, 2007 1:54 pm

Post by simranjits »

boothee , do u use some kind of adaptor to attach the webcam to the eyepiece? can u explain how u do it?
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alvinsclee
Posts: 299
Joined: Mon Feb 20, 2006 9:21 pm

Post by alvinsclee »

Simranjits - here is a link for you to start... http://www.webcam-astrophotography.com/ ... y-faq.html

Boothee - about the difficulty in focussing without using 2x (2x barlows)... did you forget to remove the front lens of your new webcam? The lens in place may be altering the optical path such that you are forced to use those barlows to 'recorrect' the focussing plane. As for the aperture control, I have no idea... let's wait for the astrophotography experts here to dispense more advice.
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boothee
Posts: 499
Joined: Fri Apr 08, 2005 5:38 pm
Location: Myanmar

Post by boothee »

simranjits wrote:boothee , do u use some kind of adaptor to attach the webcam to the eyepiece? can u explain how u do it?
Yes simranjits. I use my homemade adaptor. Please see boothee's equiptment.
Cheers!
boothee
1150mm, 254mm, Newtonion Reflector on EQ5 Mount with dual axis DK3 drive, QHY5 Camera, Canon 300D + Kit Lens, Yangon, Myanmar.
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boothee
Posts: 499
Joined: Fri Apr 08, 2005 5:38 pm
Location: Myanmar

Post by boothee »

alvinsclee wrote: Boothee - about the difficulty in focussing without using 2x (2x barlows)... did you forget to remove the front lens of your new webcam? The lens in place may be altering the optical path such that you are forced to use those barlows to 'recorrect' the focussing plane.
Thanks for your kind reply Alvin. Yes I'm sure I took out the lens as I need to put my adaptor in front of webcam to attach to my telescope.
:cry:
boothee
1150mm, 254mm, Newtonion Reflector on EQ5 Mount with dual axis DK3 drive, QHY5 Camera, Canon 300D + Kit Lens, Yangon, Myanmar.
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alvinsclee
Posts: 299
Joined: Mon Feb 20, 2006 9:21 pm

Post by alvinsclee »

Looks like your scope is facing 'insufficient in-travel' (back focus) problem.

Here is a link to read more about back focus and measuring back focus...
http://www.alpineastro.com/Binoviewers/ ... back-focus

If your webcam cannot reach focus, then you will either have to remove in-between elements (filters, diagonals) to make the cam as near as you can to the scope... or you may have to move the primary mirror (which I think will be quite a tedious task).

I am wondering if there are other ways to overcome this problem... I am facing a similar problem with my Vitacon SwingView birding scope.
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