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

["Bert Katzung" <katzung1@attbi.com>]

Yi-Zen:
I have not found the 180 Nikkor 2.8 to require separate rings, my Bogen
ball-head supports it nicely from the camera's socket. Longer, larger
lenses certainly would require support out in front and Losmandy rings are a
standard:
http://www.losmandy.com/  I use the 125 mm Losmandy rings and they are a
good size for most of the larger lenses.
Other companies (eg, Milburn) also make rings; check google.
Bert

Bert Katzung
katzung1@attbi.com
www.astronomy-images.com

----- Original Message -----
From: "Jerry Lodriguss" <jerry@astropix.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Friday, June 13, 2003 10:36 PM
Subject: Re: [APML] Trailed Stars, Large Errors: Help for a Newbie


>
> >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?
>
> I've used several different models of the 180mm, the manual focus ED and
> the EDIF.  I've used Leitz, Slik and Gitzo ball heads with them.
>
> I had the rings custom made, but you can probably use some that are off
the
> shelf.
>
> This is one of the hardest lenses to use on a ball head, or tripod head
> because of the large lever arm from the weight of the lens, and the single
> lock point at the farthest point of the lever at the tripod socket of the
> camera.
>
> You can also use a hybrid system where you anchor the camera with the
> tripod socket and use a ring on the front of the lens, but this limits
your
> ability to rotate the lens radially for framing.
>
> Jerry
>
> The book "Photoshop for Astrophotographers" is now finished!
>
>   Go to: http://www.astropix.com/PFA/PFA.HTM
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
>


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