fans

[beanyboy1982]

might sound stupid but why do people put fans on the bottom of their scope when its cold outside anyway ?

[Charic]

Draws the cooler air through quicker. I store my scope indoors, so If I wanted to reduce the time for my telescope to ambient, I could fit a mirror!

[beanyboy1982]

argh right so it just makes a faster set up

[Charic]

.........effectively yes. Careful mounting reduces vibrations entering the scope, which will shake your image at higher magnifications. Some folk use a basic PC fan and a 9V battery, possibly adding a resistor and a switch for customisation. 

[faulksy]

might sound stupid but why do people put fans on the bottom of their scope when its cold outside anyway ?

are you buying ian, and what ?

Draws the cooler air through quicker. I store my scope indoors, so If I wanted to reduce the time for my telescope to ambient, I could fit a mirror!

do you mean fan ?

[beanyboy1982]

ordered a 200p dob faulksy just waiting for it to arrive

[beanyboy1982]

seen small computer fans on the bottom of scopes

[Charic]

are you buying ian, and what ?

do you mean fan ?

......Its an age thing, or my head in the clouds?

[Scott]

......Its an age thing, or my head in the clouds?

I always know what I'm typing... I never make banana 

[Moonshane]

I tend to use fans to cool and then turn off for observing.

[John]

I tend to use fans to cool and then turn off for observing.

You or the scope Shane ?

[Charic]

No matter how well balanced the fan bearings, I would do as Moonshane suggests, however,  I would be more inclined to  cut a hole to accept a fan for cross flow  ventilation with  exit ports. The arguments for suck or blow  along the OTA continue, but I favour the cross flow method.

[faulksy]

ordered a 200p dob faulksy just waiting for it to arrive

nice one, your going to love it. hope you have seen one in the flesh there big

[beanyboy1982]

Yeah went and had a play with 1 first lol