Perseids 1997: photographic results
team Delphinus, Biddinghuizen
As you will understand many meteors will have been photographed by the Delphinus-team in Biddinghuizen. At this moment the incredible number of films are ready for development! This is very probably an all-time record for team Delphinus and the (former) team Buurse. All details will be published at this page. So stay tuned!
For each night we will split up the photography into 4 sections:
- Low (50 mm) battery (9 camera's at 30 degrees elevation)
- Middle (50 mm) battery (7 camera's at 55 degrees elevation)
- High (50 mm) battery (4 camera's at 75 degrees elevation)
- 85 mm project (4 camera's at 75 degrees elevation)
- Camera's: Canon T-70 with 1.8/50 mm objectives
- Exposurecontrol by means of the commandback-70 and DCF-time control Frankfurt
- Film: Kodak T-max 400 and Kodak Tri-X 400 ISO
- Developer: Kodak T-max 1:4 for about 6 to 7 minutes at 24 to 25 degrees centigrade
- Stop: Amaloco S-10 1:19 for about 2 minutes
- Fix: Amaloco X-88 1:4 for about 5 minutes
- Washing for about 30 minutes in running water
- Finish with destilled water
- Exposuretime: Middle battery: 20 minutes; low battery: 17 minutes
- Aperture: Middle battery: half stop; low battery: one full stop
- Sectormotor: 12.5 rps electronically controlled; deviations less than 0.1%
- Middle and low battery: 4 blades, 30 degrees; yielding 50 breaks per second
- 85 mm project: 6 blades, 30 degrees; yielding 75 breaks per second
- 85 mm project sectormotor powering by nicad cells.
- Middle and low battery camera heating through resistors of 10 watts.
- 85 mm project camera heating by means of mini heaters of grabber mycoal.
For each camerabattery the following information will be published:
- Number of pictures
- Start of exposures
- End of exposures
- Total exposuretime
- Number of meteors
For each night the following numbers will be published:
- Total number of camera's operational
- Total number of pictures
- Total number of photographed meteors
Latest: at this moment (fridaymorning august 15) 16 films have been developed. Later today another tranch of 8 films will be developed. And 4 tranches of 8 films are on schedule for saturday and sunday.
We (DMS - team Delphinus) are gratefull Kodak Nederland BV has sponsored our Perseid campaign by generally supplying us the photographic material (Kodak Tri-X pan ISO-400 films) which are used during this very successfull Perseid campaign and will be used in future photographic campaigns such as the Orionids, Taurids, Leonids and Geminids.
|This page was last modified on August 15, 1997 by
Casper ter Kuile and Robert Haas