Re: [APML] Trailed Stars, Large Errors: Help for a Newbie

["Yi-Zen Chu; Yiren Qu" <yi-zen.chu@yale.edu>]

Jerry Lodriguss wrote:

> It could be flexure between the STV and mount, or mount and camera, or 
> a permutation or combination of all three. With single mounting bolts 
> and a 180mm lens on a ball head, you are asking for trouble.  
> Personally I have tried the 180mm on a very large and substantial ball 
> head, and I got trailing every time. That size lens really needs to be 
> in a set of rings, or mounted at two points minimum. 


Hello Jerry,

Were you using the 180mm 2.8 EDIF lens (I have this lens too)? Which 
"very large and substantial" ball head were you using? How / Where do I 
find the rings you are taking about above, since the 180mm does not come 
with a tripod collar?

Thanks,
Yi-Zen

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