| Author |
Message |
|---|
|
|
|
Here is a picture of my new cooler; rated to cool to 38C below ambient. To put the size into context the central two sockets are USB A and B.
It doesn't cool a CPU however but a CCD for astrophotography. These things don't chuck out the heat of a highly stressed CPU; I suppose a typical uncooled image sensor of a dSLR might stabilise at 20C above ambient. Still it is impressive to watch the temperature drop. Oddly enough it also contains a heater to ensure that condensation and ice don't form in unwanted places.
|
|
|
|
|
|
That is super awesome! Would love to see some of the pics of the setup and of course the results :) |
|
|
|
|
|
There is not a huge amount to see in terms of set-up. If you said some people were trying to compensate for something by having huge telescopes I couldn't possibly comment. I'd rather a smaller one I actually use. And I think that is true for telescopes too.The telescope is smaller than most toy-shop ones with an objective lens of 80mm and a focal length of 480mm. It is on a pretty meaty tripod tho'.
A relative recent Photo of the Day post has a picture taken with it and there are some older ones using of the sun and moon using the telescope and a different camera.
If I get a moment I'll do a picture. |
|
|
|
|
|
Fair enough. I'll checkout the thread... hadn't seen that one |
|
|
|
|
|
Here is at least arguably the worst photo to disgrace the AtP message boards. And plumbing the depths at AtP takes some doing.
I am aware the mount configuration is unusual but it does work; if it is not too cold.
 |
|
|
|
|
|
Am surprised you even posted this fuzzy and out of focus picture. You know better than to bring our high quality image to it's knees.
I can't even make out your brand new cooler. I'm confused what it's trying to cool as well.
However, the best part of your attempted photo is the chair. Now that's neat.
Cheers HA |
|
|
|
|
Am surprised you even posted this fuzzy and out of focus picture. You know better than to bring our high quality image to it's knees.
I can't even make out your brand new cooler. I'm confused what it's trying to cool as well.
However, the best part of your attempted photo is the chair. Now that's neat.
Cheers HA
I don't sit in the chair Rick. The chair keeps the laptop off the ground.
I set the thing up and then the laptop controls the camera and if I ask it nicely guides the telescope too. I sit inside in the warm making fun of Americans over the internet. Then at the end of the evening I go outside and bring the stuff inside again. In the really streamlined operations I delete the files without looking at them.
The picture is fuzzy and out of focus because I was shivering in the cold and condensation from my breath was fogging the lens. It is as we say over here brass monkey weather.
|
|
|
|
|
The picture is fuzzy and out of focus because I was shivering in the cold and condensation from my breath was fogging the lens. It is as we say over here brass monkey weather.
And now I have another question. Based on your answer as it relates to the why and where fores and weather why on earth do you need a "cooler" |
|
|
|
|
The picture is fuzzy and out of focus because I was shivering in the cold and condensation from my breath was fogging the lens. It is as we say over here brass monkey weather.
And now I have another question. Based on your answer as it relates to the why and where fores and weather why on earth do you need a "cooler"
Hahaha. I was wondering the same thing! I'm cold just looking at that picture! Or maybe that shiver down my spine is admiration of the outstanding photographic techniques at work? ;) |
|
|
|
|
Hahaha. I was wondering the same thing! I'm cold just looking at that picture! Or maybe that shiver down my spine is admiration of the outstanding photographic techniques at work? ;)
Ah yes, Derek will fit right in! |
|
|
|
|
Hahaha. I was wondering the same thing! I'm cold just looking at that picture! Or maybe that shiver down my spine is admiration of the outstanding photographic techniques at work? ;)
Ah yes, Derek will fit right in!
Cheque is in the post Del Boy.
The red and black box at the start of the thread and on the right hand end of the telescope contains the camera which is a black and white CCD job as used in industrial and security cameras. There is also a carousel which positions each of 5 filters in front of the the CCD. Most colour chips are black and white chips with filters permanently in place; it is more efficient to swing the desired filter in place especially since I may use different filter packs for different objects. The laptop controls the carousel for me and saves ages dismounting the camera and hunting around for small and expensive filters in the dark.
With faint objects thermal noise creates artefacts on the image which would be overwhelmed by bright "ordinary" subjects and cooling the camera down reduces them. It was more than cool enough not to bother with the cooler last night tho' Brink would doubtless regard it as toasty. Finally the box contains a Peltier cooler which dumps heat to the black finned heatsink which has a couple of fans.
Not shown on the original picture and barely visible on the second is a second smaller camera which picks up a portion of the light exiting the telescope. Via the laptop it can tell if the stars are moving across the field of view and if so instructs the mount to move to keep the picture centred. |
|
|
