On Tue, 25 Sep 2007 21:54:02 -0700,
(E-Mail Removed) wrote:
>I took some photos of the moon tonight. They were taken around 20:30h,
>1 hour after sunset. The moon was located less than 45 degrees from
>the horizon. I don't know whether the timing and the position of the
>moon was ideal or not.
>The smaller moon object was taken with the G7, and the larger ones
>with FZ18. I also was not sure whether I should push the zoom beyond
>the 6x optical for the G7, and beyond the 18x for the FZ18. However,
>the maximum 24x in G7 is still relatively small in comparison to the
>FZ18 )which is about 72X (??)
>It appears that the best exposures were taken at -1.5 to -2 EV (under
>exposed) for both camera. I think the IS was not turned off.
>They do not show as sharp as other photos that I have seen. Perhaps I
>need to look for better conditions and should not go into the digital
>zoom territory? Any comments?
>http://picasaweb.google.com/aniramca/Moon_shots
>(Note that exif data were shown in each photos)
Digital zoom on Canon cameras will not help, but using RAW will (obtain CHDK to
enable RAW output from your G7). Unlike some other digital cameras where digital
zoom is applied directly to the RAW data and it can actually provide more detail
in the final JPG files, Canon does not take this route. So no more detail is
available in using digital zoom in Canon cameras. I've not tested this in
Panasonic cameras but have in Canon cameras. In order to find out if
digital-zoom can afford more details in the resulting JPG image you'll have to
take images of identical subjects (hi-resolution test charts preferred) with
full digital-zoom and without. Then up-sample the non-digital zoom data to the
same subject dimensions as the digital-zoomed image using the very best
up-sampling algorithms/programs that you can find. Compare them. If you can't do
better with up-sampling algorithms in post processing as you can do with
digital-zoom, meaning you can discern more detail in the digital-zoomed image
than the up-sampled ones, then Panasonic is applying the digital-zoom to the RAW
data directly and is therefore definitely worth using. If you have RAW available
then this is superfluous as you can obtain the same amount of detail from the
RAW data. Post-processing up-sampling methods on RAW data will always beat any
in-camera up-sampling methods.
Use spot-meter mode to set your exposure for the moon's surface. Remembering
that the lighted side of the moon is no different than subjects on the earth lit
by the sun at noon. No need to play around with EV values if you use your
spot-meter or just use the "Sunny 16" rule..
Since you will be using shutter speeds as fast as during full sunlight, using
the camera's IS will give you the same stability at whatever focal-length of
zoom you use as during day. Hand-held shots of the moon that are crisp and clear
when using an IS equipped camera are not only possible but ordinary today.
Anyone that has to use a tripod to get a crisp shot of the moon at long
focal-lengths (200-600mm, 35mm eq.) when they have IS at their disposal knows
very little about photography, available-light exposure settings for common
subjects, the IS is poorly implemented in their cameras or lenses, or is just
really bad at hand-held technique in general.