Moon and Mars on 27th August.
- Thread starter Kenji
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Starman said:
Hi Starman,
Nice picture!
How do you interface the telescope and the camera. I am planning to get a telescope and hope to use my Canon D30 to take some pictures.
How much does a 167X telescope (the one you are using) cost? I am just trying to get an idea of the costs. Please check your PM too.
Thanks.
NV
The cost of a telescope depends much more on the aperature (diameter of the telescope main mirror or lens) and the mount than the magnification. You can change the magnification just by changing the eyepiece (or use a barrow lens). You get have 167x on both a 90mm and a 200mm aperature telescope, but there is a huge difference in terms of quality or usability.
That said, a 200mm scope (8in) like that used for the photo goes for about $2000-4000 depending on the coating and the mount and excluding shipping. Almost 1/2 of that cost goes into the mount.
That said, a 200mm scope (8in) like that used for the photo goes for about $2000-4000 depending on the coating and the mount and excluding shipping. Almost 1/2 of that cost goes into the mount.
N V Rao said:
I have replied your PM, but for the benefit of others wanting the know the attachment, here is the link:
http://203.81.46.206/images/test/lxd55.htm
Starman said:
O gosh........
I think this must be the most full featured 8" I have seen.......
Frankly it looks more like a 10"
Er Starman,
Can you take the hood off and stop scaring the kids......:sweatsm:
Jokes aside, some questions here :
Are you using a SCT 2" Diagonal?
The 2" item shown on the last pix, is it a tele-extender or a eyepiece with integrated T-mount?
You use a 2x TC right?
frisky said:
Haha..about the hood. Well, actually it is to show how I focus using the 10D. See the hood has three triangles? When we point the scope at a bright star, we should see three stars in triangular shape due to the mask. Then we use the telescope focuser to focus till the "three star" merge together as one. When that happens we know it is accurately focus.
Yes, that is a 2" SCT diagonal. The 2" item shown is an eyepiece. There is no integrated T-mount. Coincidentally the 10D fits perfectly onto this eyepiece without any T-mount so we just use a bracket to hold the camera by clamping onto the eyepiece. Can be seen in the pics.
2X TC? No, we didn't use that. The eyepiece is a 30mm, so on this scope, it gives 2000/30 = 67X. Not enough mag. for planets, but good enough for moon and far too much mag. for deep sky. For deep sky (like the Orion nebula that I shot shown on other threads), we need to use a focal reducer to reduce the focal length of the scope. We reduce it to 1260mm, so the mag is 1260/30 = 42X, which is pretty good for deep sky.
For planets, I will use a Coolpix 4500, which allows 4X optical zoom to bring the magnification up further. The eyepiece will not be this one , but a 24mm + 2X barlow, giving an effective 167X. With 4X optical zoom, it will be 668X.
Hope this explains.
By the way, here is the picture of my scope after working hard the whole night at dawn. A bright object behind is the moon
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