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Negative Bulb Blower

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9 replies to this topic

#1 Mark SW

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Posted 24 June 2021 - 09:07 AM

I searched  Negative Bulb Blower in the forms and found very little.

My question:

Is it safe to use on a 16" primary mirror just to clear off minor dust?

And if possible any brand or are they all alike?

Thank you

Mark

 

 



#2 Jon Isaacs

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Posted 24 June 2021 - 09:55 AM

I googled it to see what a negative bulb blower is.

 

At least some of them have a brush attachment.

 

Brushing a mirror to dust it can put fine scratches in the surface, it's definitely something to avoid. Mirror coating are relatively soft so great care in cleaning is needed.

 

A rocket bulb blower can used to try to blow the dust off.

 

Otherwise, leave it or clean it properly. This is the method I use..

 

https://youtu.be/9Y8xFnXFVGQ

 

Jon


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#3 havasman

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Posted 24 June 2021 - 10:20 AM

Giotto Rocket Blower is tops and readily available for little $. It "inhales" from the rocket fin end and blows through the long nose cone end so it isn't sucking up what it blows off the surface. It's most often all the cleaning you need.


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#4 Mark SW

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Posted 24 June 2021 - 11:23 AM

Jon and havasman thank you for the response.

Jon I watched and saved the video and will use it when my mirror gets dirty. Right now it is just a little dusty.

havasman thanks for the "Giotto Rocket Blower is top" suggestion.

 

Mark


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#5 Daniel Guzas

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Posted 09 July 2021 - 11:23 PM

+1 on the Giotto Rocket Blower.. I have them in all my eyepiece boxes and it’s the only “air” I use on eyepieces, mirrors and other optical surfaces / tubes.

 

One of the best astronomy tools you can have in your kit in my opinion. No one should leave home without it.


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#6 Keith Rivich

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Posted 10 July 2021 - 12:20 PM

I have an air compressor in my garage which I use to blow off the mirror and mirror box after dusty observing. Very carefully with low pressure, of course. 



#7 turtle86

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Posted 11 July 2021 - 08:49 AM

+1 on the Giotto Rocket Blower.. I have them in all my eyepiece boxes and it’s the only “air” I use on eyepieces, mirrors and other optical surfaces / tubes.

 

One of the best astronomy tools you can have in your kit in my opinion. No one should leave home without it.

+2  I have several, in my eyepiece cases and my camera bags.



#8 spaceoddity

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Posted 11 July 2021 - 09:39 PM

The rocket blower can be used to blow off loose dust on a small mirror or eyepieces. For my larger mirrors I use a cheap plastic hand pump like the ones you use to blow up a football or basketball, without the needle attachment. It creates more pressure and larger blast of air than a bulb blower. I think it was around $5 at wal-mart. 



#9 MitchAlsup

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Posted 12 July 2021 - 07:44 PM

I use a 1" wide camel's hair brush which has never been used for anything other than brushing optics. The brush is cleaned with a few strokes across the not so recently washed hands to dislodge the dust and to give the hairs just a smidgen of hand oils.

 

I have a 20" mirror 20 years since being recoated that you would be hard pressed to find any micro-scratches.



#10 steveincolo

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Posted 15 July 2021 - 08:20 AM

In addition to getting dust off mirrors and eyepieces, I’ve used the Giotto Rocket Blower to get dust off the sensor on my Sony a6000 interchangeable lens camera.  Highly recommended!




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