Solar Eclipse Photography on the cheap - Turkey '06

"orrerymaker" ha scritto nel messaggio
...
I have just got a test film back from Boots, best results using Baader
Astro-solar film over the aperture were ...

1/250 sec with a f8 mirror lens and 200ASA Kodak colour film. Tripod and
cable release are a must if lens is 200 mm or longer.

Best regards

Peter

Have you had a good sky transparency during your tests? According to
Espenak's table of exposure
http://sunearth.gsfc.nasa.gov/eclipse/SEmono/TSE2006/TSE2006tab/TSE2006-tab23.html
the best timing with your system should be 1/1000 of sec.
I did some tests during a very bright and clear Saturday with Baader ND 5,
Baader ND 3.8 and Thousand Oaks Black Polymer ND 5, using a Tamron 500 mm
f/8 and 2x multiplier lens, on Fuji Sensia film 100 ISO. Best results were
1/250 for Baader ND 5, 1/125 for Black Polymer and 1/2000 for Baader ND 3.8.
Unless you were using a very old Baader ND 6.0 which was available for the
August 1999 eclipse...

As for my own attempt to record the eclipse, I would try with the above
equipment and Thousans Oaks Black Polymer shooting three images for each
time in the range from 1/60 to 1/250 and would try the sequence with a 135
mm with same Black Polymer. Ah, the site: as Salloum, Egypt.

Clear skies,
---
Beta Persei
45° 35' N
08° 51' E

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"Beta Persei" wrote in message
...

"orrerymaker" ha scritto nel messaggio
...
I have just got a test film back from Boots, best results using Baader
Astro-solar film over the aperture were ...

1/250 sec with a f8 mirror lens and 200ASA Kodak colour film. Tripod and
cable release are a must if lens is 200 mm or longer.

Best regards

Peter

Have you had a good sky transparency during your tests? According to
Espenak's table of exposure
http://sunearth.gsfc.nasa.gov/eclipse/SEmono/TSE2006/TSE2006tab/TSE2006-tab23.html
the best timing with your system should be 1/1000 of sec.
I did some tests during a very bright and clear Saturday with Baader ND 5,
Baader ND 3.8 and Thousand Oaks Black Polymer ND 5, using a Tamron 500 mm
f/8 and 2x multiplier lens, on Fuji Sensia film 100 ISO. Best results were
1/250 for Baader ND 5, 1/125 for Black Polymer and 1/2000 for Baader ND
3.8.
Unless you were using a very old Baader ND 6.0 which was available for the
August 1999 eclipse...

As for my own attempt to record the eclipse, I would try with the above
equipment and Thousans Oaks Black Polymer shooting three images for each
time in the range from 1/60 to 1/250 and would try the sequence with a 135
mm with same Black Polymer. Ah, the site: as Salloum, Egypt.

Clear skies,
---
Beta Persei
45° 35' N
08° 51' E

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Bought from David Hinds it just states 'Baader AstroSolar' on the pack, in
the text it states a 99.999% reduction of intensity. As cameras (and
lenses) can vary I always run a test film when using new filters. There is
quite a bit of lattitude with print film, but even so it is always safer to
bracket by 2 stops. There was light cloud, and it was 10 am this morning
(in UK) , so, as you say, probably 1/1000 in Turkey?

Best regards

Peter

"orrerymaker" ha scritto nel messaggio
...


Bought from David Hinds it just states 'Baader AstroSolar' on the pack, in
the text it states a 99.999% reduction of intensity.

According to Baader's website
http://www.baader-planetarium.com/sofifolie/sofi_start_e.htm it is a ND
5.0

As cameras (and
lenses) can vary I always run a test film when using new filters. There is
quite a bit of lattitude with print film, but even so it is always safer
to bracket by 2 stops. There was light cloud, and it was 10 am this
morning (in UK) , so, as you say, probably 1/1000 in Turkey?

Well, Espenak's table should be "location insensitive", while it should be
affected by sky transparency, fog, mist, haze, clouds other than Sun's
height in the sky. All conditions that are quite difficult to replicate
correctly...hence the need for bracketing...

All the best,

--
---
Beta Persei
45° 35' N
08° 51' E

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