J. Williams <williams@xxxxxxxxxxxxxxxx> wrote:
>I am thinking of using the 300mm with the 2x for photographing the next
>Total Solar Eclipse to get a bigger image. Any concerns?
I get poor results with a 2X TC with my 300mm. I'd be pleased to negotiate
a trade <g>.
>Would I get better images with a portable refractor like the Pronto by
Televue?
The Pronto, with its greater focal length, will give you a larger image in
the 35mm frame. It is a fine instrument and I have only praise for it,
within its design limitations. It will so solar work to an exceptionally
high level.
>How about recommended film and exposures for the various phases of a solar
>eclipse? How to maximize exposure settings in a few minutes?
An ISO 100 (+/-) speed film is prefered. Slide/negative/B&W is a personal
matter of choice. For partial coverage, 1/500 sec works well at f/8. As
totality progresses, increase exposure time to a max of 1/4 to 1/2 sec at
totality. Practice with a full sun to get a benchmark with your specific
film/lens/filter combination.
>I am thinking about getting the Quartz Intervalometer to use with my winder
2
>and an OM-4t. Opinions?
Nice, but not necessary. A momentary switch connected to the Winder 2 is
all you need.
>
<little snip>
>I find the 300mm hard to focus at infinity (since it focuses past
>infinity) with the 1-10 grid screen. Any recommendations for a better
>screen to use?
I like the Beattie grid interscreen. Very bright. The newer 2-13 is also a
good choice.
John P
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