Ccd imaging for deep sky objects, Terrestrial photography, Metering – Celestron XLT series User Manual
Page 38: Reducing vibration
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pecial cameras have been developed for taking images of deep sky images. These have evolved over the last several
ateurs can take fantastic images. Several books have been written on
ow to get the best images possible. The technology continues to evolve with better and easier to use products on the
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years to become much more economical and am
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oto lens for terrestrial (land) photography. Your telescope is in essence a
g
R cameras are mounted directly to the telescope (using the built-in T-
nian or using the # 93633-A T-Adapter for the Schmidt-Cassegrain). For using a
it
ersal Digital Camera Adapter (# 93626).
u
e, nature, and just about anything. You will have to experiment
Your
telescope makes an excellent
teleph
on focal length telephoto lens. 35mm SL
l
Adapter on the refractors and Newto
ig al camera you will need the Univ
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o can take images of various scenic views, wildlif
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with focusing, speeds, etc. to get the best image desired.
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e fixed apertures and, as a result, fixed f/ratios. To properly expose your subjects
o
your shutter speed accordingly. Most 35mm SLR cameras offer through-the-lens
your picture is under or overexposed. Adjustments for proper exposures are made by
hanging the shutter speed. Consult your camera manual for specific information on metering and changing shutter
The Omni Series telescopes hav
phot graphically, you need to set
metering which lets you know if
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speeds.
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lly can cause vibrations, producing blurred photos. To reduce vibration when tripping the
. A cable release keeps your hands clear of the camera and lens, thus eliminating the
cal shutter releases can be used, though air-type releases are best.
ur
ter speeds that are too slow. To prevent this, use films that produce shutter
ee
hen hand-holding the lens. If the lens is mounted on a tripod, the exposure
ibration Suppression Pads (#93503).
These pads rest between the
reduce the vibration amplitude and vibration time.
Re asing the shutter manua
e
shutter, use a cable releas
possibility of introducing vibration. Mechani
Bl ry pictures can also result from shut
p ds greater than 1/250 of a second w
s
length is virtually unlimited.
nother way to reduce vibration is with
the V
A
ground and tripod feet. They
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