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jermng
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Joined: Tue May 17, 2005 7:09 am

Post by jermng »

Sorry, I was talking bout the Sky View Pro mount which is a clone of the CG-5 ... that tripod has a fixed peg. :) The CG5's peg can be screwed off ... :) my bad. :)

For photography, you can use drift alignment - google it, you'll find lots of detailed sites. :)
Jeremy Ng
C8, CR-150HD, TMB 80 f/6
Orion SVP Intelliscope, AstroSlew I
Minolta Activa 12x50WA
Athlon
Posts: 14
Joined: Thu Sep 01, 2005 7:42 pm

Post by Athlon »

weixing wrote:That's depend on how short is your "short exposure" and the focal length of your scope too. By the way, you'll have more problems in Astrophotography on the CPC.
Maybe about 30s or a minute.
jermng wrote:For photography, you can use drift alignment - google it, you'll find lots of detailed sites. :)
Read about it before in a few sites. I also watched a video from Andysshotglass.

According to this thread, the lowest latitude the mount can go is 2 degrees. So even with drift alignment, won't it be inaccurate?
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weixing
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Joined: Wed Oct 01, 2003 12:22 am
Favourite scope: Vixen R200SS & Celestron 6" F5 Achro Refractor
Location: (Tampines) Earth of Solar System in Orion Arm of Milky Way Galaxy in Local Group Galaxies Cluster

Post by weixing »

Hi,
Maybe about 30s or a minute.
Hmm... I'm not sure... C8 focal length is quite long even with focal reducer (around 1250mm), but I think it is still posible. FYI, I'm able to get a decent 1 mintue exposure image on a 1000mm scope without using a GOTO mount.
According to this thread, the lowest latitude the mount can go is 2 degrees. So even with drift alignment, won't it be inaccurate?
I think if your exposure is around 1 mintue, I think you may still can get away with it if you use a GOTO mount and do drift star alignment. FYI, I also didn't do the drift alignment for the latitude part for all my images... due to save time, lazy and enviroment limitation (a lots of excuse :mrgreen: :mrgreen: ), I just use the scale on the mount... So I think my actual latitude is also not that accurate, but I still can get away with it for 1 minute exposure on a 1000mm focal length scope.

By the way, I think if you want a mount to do astrophotography, get an EQ mount... you'll have less problem than a fork mount.

Have a nice day.
Yang Weixing
:mrgreen: "The universe is composed mainly of hydrogen and ignorance." :mrgreen:
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