Crescent Moon

Uploaded: August 07, 2001 01:32:30


Many shoot a full moon. A crescent can bring out the dimensions of the mountains and craters even though it's only a sliver.


Glenn Theal August 07, 2001


Very interesting!

I would like to know the F/Stop, shutter speed, and film speed that you used.

Glenn #343

John A. Lind August 07, 2001

I'm not the best at recording these things. I was in a hurry to set up and shoot it knowing I would have to bracket exposure. The moon was setting and about to disappear on the horizon at the time. Lens was a 300mm f/4.5 with a high end 7-element 2X teleconverter; effectively makes it a 600mm f/9 lens. Effective aperture was f/11 (lens set to f/5.6) and shutter speed likely 1/30th (possibly 1/60th). Film is Kodachrome 64.

Lens has a tripod mount and the tripod is a very sturdy Bogen with a heavy duty head. Used a cable release and the self-timer. The self-timer on my camera body pre-fires the mirror and stops the lens down immediatly delaying only the shutter travel. This eliminates vibration and shake from mirror slap and the lens stop-down mechanism by allowing it to settle while the timer is counting down. At 600mm it takes very little to show visible shake in the viewfinder.

-- John #528

Glenn Theal August 07, 2001

Hi, John:

Thanks for the info. I really appreciate it as I would like to start making some similar shots.

As for recording the info, I know what you mean. However, I use a Visor Handspring PDA to record my data into a database program. Everything is point and click. The program I use on the PDA is called JFile. I wrote the Dbase program in FileMaker Pro and then I just sync everything. The Visor is also backlit so you can see at night.

Glenn #529

Nikki Schwerdfeger August 12, 2001

Glen I'm really new at using the latest tech products but am quite interested in your use of a PDA to record data. Could I have more detail either here or on personal e-mail at I work with my children for 4-H Photography and any additional learning is always appreciated.


John A. Lind August 12, 2001

The traditional method is keeping notes on a small pad. I keep one in the camera bag but do not always use it. Experiments and anything unusual or done differently from normal that will not be obvious from the imaages definitely calls for notes:
- location, time and date
- weather conditions (including relative temp, humidity, etc.)
- film, body, lens and tripod (if used)
- exposure settings
I've done something similar also using a micro-cassette recorder. Whether or not I've kept notes during shooting, rudimentary data with dates and locations are recorded on the archive pages when the transparencies or negatives are archived. Glenn can explain his method (I believe PDA = Personal Data Assistant [?]).

-- John #572

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