Tempest fans

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Jethro 7
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Tempest fans

#1

Post by Jethro 7 »

I will make this short. I live in NW Florida, where humidity is high in the summer. Will a Tempest fan introduce moisture in to the scope body? Thank you Jethro.
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JayTee
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#2

Post by JayTee »

It will introduce all kinds of things into the scope (OTA) body - dust, dirt, moisture, pollen, and any number of things that can become airborne with such a forceful fan! Not to mention that you will be disrupting the air around your scope, air that you would like to be as still as possible for good viewing and stable EP images! IMO- not a good idea.

Cheers,
JT
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Jethro 7
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#3

Post by Jethro 7 »

Thank you JT.
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AntennaGuy
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#4

Post by AntennaGuy »

JayTee wrote:
Tue Mar 17, 2020 2:11 am
It will introduce all kinds of things into the scope (OTA) body - dust, dirt, moisture, pollen, and any number of things that can become airborne with such a forceful fan! Not to mention that you will be disrupting the air around your scope, air that you would like to be as still as possible for good viewing and stable EP images! IMO- not a good idea.

Cheers,
JT
JT, are you talking about these [ https://www.deepspaceproducts.com/category/temp-est ] or something else? I have been under the impression that the TEMP-est products are quite highly-regarded and I have them on my list to include in my (eventual/ dream) large-SCT telescope. I take it you would advise against that? I'd like to learn more about that.

Added: Might you have meant these, which are very different: http://www.tempest.us.com/product-categ ... -products/ ?
* Celestron C6 SCT on a Twilight 1 Alt-Az mount
* Meade 323 refractor on a manual equatorial mount.
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notFritzArgelander
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#5

Post by notFritzArgelander »

AntennaGuy wrote:
Wed Mar 18, 2020 2:16 am
JayTee wrote:
Tue Mar 17, 2020 2:11 am
It will introduce all kinds of things into the scope (OTA) body - dust, dirt, moisture, pollen, and any number of things that can become airborne with such a forceful fan! Not to mention that you will be disrupting the air around your scope, air that you would like to be as still as possible for good viewing and stable EP images! IMO- not a good idea.

Cheers,
JT
JT, are you talking about these [ https://www.deepspaceproducts.com/category/temp-est ] or something else? I have been under the impression that the TEMP-est products are quite highly-regarded and I have them on my list to include in my (eventual/ dream) large-SCT telescope. I take it you would advise against that? I'd like to learn more about that.

Added: Might you have meant these, which are very different: http://www.tempest.us.com/product-categ ... -products/ ?
Similar name, huge difference. The second link is not acceptable to use in and around an observing environment.

The first seems purpose designed and more benign. However I'm skeptical about any forced air system even filtered. (How do the filters get cleaned?) I'd wait and see if there are problems. I prefer to plan ahead and treat the optics gently.
Scopes: Refractors: Orion ST80, SV ED80 A f7; Newtonians: Z12 f5; Catadioptrics: VMC110L, Intes MK66. EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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Lady Fraktor
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#6

Post by Lady Fraktor »

The correct response is all in the spelling/ wording Jethro!
Fans like the ones that DSP sells have been in use for a few years and seem to work reasonably well according to people I have talked with before.
I personally have never used them though.

I personally would prefer a system like the Lymax as to me the 55 micrometer screening in these is still going to allow some dust into the tube over time.
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JayTee
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#7

Post by JayTee »

Might you have meant these, which are very different: http://www.tempest.us.com/product-categ ... -products/ ?
Uh, yeah. OOOPS, MY BAD!!! Disregard my post.

Thanks AG,
JT
∞ Scopes: Celestron CPC1100 #2 Scope: 8" f/7.5 Dob AP Scopes: TPO 6" f/9 RC, ES 80mm f/6 APO G&G Scopes: Meade 102mm f/7.8, Bresser 102mm f/4.5 Guide Scopes: 70 & 80mm fracs
∞ Mounts: iOptron CEM60, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: Canon T3i (x2), ZWO ASI120MC, Orion SSAG
∞ Binos: 10X50,10.5X70,15X70², 25X100
∞ EPs: ES: 21 100°, 30 82° X-Cels: 9, 12, 18, 25 GSO:15,20

HOME Image

My Wx https://dashboard.ambientweather.net/de ... 837a4f803c
I never met a scope I didn't want to keep. "My God, it's full of stars."
Searching the skies since 1966!
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