Re: [APML] Imaging the Venus Transit

["Stuart Heggie" <stuart.j.heggie@sympatico.ca>]

Thom, I would think 300mm is too short a focal length. Given the
brightness of the sun, would it be easier to borrow a 2x teleconverter?
That would get you closer and easier. I'm planning to use a 500mm
mak-cass and it is barely going to be up to photographing Venus against
the sun's disk. The nice thing is that it is a good visual performer so
I'll be observing with it too. Chose this over my long telephoto with 2x
for this reason.

Stuart
http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/
Flesherton, Ontario, Canada

----- Original Message -----
From: "Thom Iwancio" <tiwancio@sc.rr.com>
To: <astro-photo@seds.org>
Sent: Monday, May 24, 2004 5:33 AM
Subject: [APML] Imaging the Venus Transit


> Hey all, I plan to head to the South Carolina beach on the 8th to
> maximize my view of the transit.  Given the size difference of the Sun
> and Venus do you think a 300mm tele will provide too small an image
for
> the planet's disc to be visible? Otherwise I have to get cracking in
> making an off-axis filter for my 8"SCT and coming up with a tripod
mount
> in the next week or two.
>
> For the telephoto shots I use solar film held in a Cokin A series gel
> holder.  This makes it easy to use a colored filter of you choice
behind
> the Baader in another holder. Easy to pop the color filter in and out
so
> you can take back to back images with and without or switch between
> Baader and Thousand Oaks film. I also plan on shooting on Velvia 50 so
I
> can enlarge to the max.
>
> Thank in advance,
>
> Thom Iwancio
> www.machunter.org
> www.elginphoto.com
>
>
>
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