DayStar Filters Magnesium Quark Eyepiece Manuel de l'utilisateur - Page 4

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Energy Rejection:

Concentrated sunlight can create very high temperatures where it

falls,

so care must be taken to prevent melted components or fire.

For brief observing sessions with less than 80mm of aperture when not

using a tracking mount, it can be OK to use no energy rejection at all. Be

alert for any rise in temperature of your telescope

diagonal, or Quark.

For telescopes under approximately 120mm of

aperture, a screw in UVIIR cut filter can be

employed in front of the telescope diagonal. The

UVIIR cut filter reflects UV and IR light back out

the front of the telescope, reducing temperatures

inside.

Do not use a UVIIR cut filter with oil

spaced objective telescopes, or any telescope

with an integrated rear field flattener or Petzval lens

The UV/IR cut filter

must be the first optical element to receive concentrated light.

Yellow or red glass front mount

Energy Rejection Filters

(ERFs),

as shown at right, do not pass the

green Magnesium wavelength and

cannot

used

with

the

Magnesium Quark.

Please note, a Herschel Wedge or

white light filter cannot be used

with the

Quark.

These filters pass

very little light by design and so will

result in an extremely dark image if used with the Quark.