Happily Serving You in the Same Location for Over 58 Years!

Welcome!

AstroSystems - 22 " Newt. Telescope Cover

Model#: AS22N-TC

Be the first to review this product

Availability: In stock

$140.00

OR
Manufactured by: AstroSystems

Details

AstroSystems Telescope Covers

W

Safely Awaiting Darkness

Water vapor from interior evaporates, passes through, droplets from the exterior run off.

 

  Effectively cover your Newtonian, Schmidt Cassegrain, Maksutov or Refractor  telescopes both at star parties and in storage.  This white, 400 denier, polyurethane coated nylon fabric will reflect the sun, resists dust and moisture and is long-lasting.  Our cover allows positioning in the horizontal when not being used so that high winds won't knock them over.  It has a draw cord at the bottom to give a snug fit around the bottom.  A sturdy 1" nylon strap is provided to attach a weight to the top end, keeping the wind from standing the scope up or turning it into a cosmic weathervane.  The water and dust resistant polyurethane inner coating rounds out a complete protection package for extended observing sessions in the bush.  The cover exterior is sprayed with a water repellant to add further protection from the elements.  The Newtonian cover comes with a storage bag and secondary mirror cover, both with draw pulls.  Worth every penny in strength, longevity and protection.  The AstroSystems cover is not intended for continuous outdoor exposure.  To retain the maximum water repellency, it is necessary to respray the cover once a year with silicone water repellant.  A 12 oz. aerosol can will spray a 18" N cover twice, a 16" SCT cover four times.  Available at hardware or discount stores for under $5.  We use the brand "weatherguard", brown can with orange top.

 

Alternative Product Comparison Chart

  AstroSystems Cover
Solar Scope Cover
"Storm" Shield Plastic Trash Bags/Tarps
Size/Shape Fitted for vertical and horizontal position Cylindrical - must be vertical or angled Cylindrical - must be vertical or angled Sheet or bag
Use All events and indoor storage Star Parties Star Parties In a pinch
Material Polyurethane coated Nylon + Silicone Polyethylene./Alum./Polyethethylene Mylar/AL/Polyethylene Polyethylene or canvas
Durability/lifetime 10-20 years 12-18 months 6-18 months Temporary
Heat rejection Reflective white (~90%) Reflective silver (~90%) Reflective silver (~90%) Usually dark colors (<70%)
Water resistance Excellent-good Excellent Excellent Good-poor
Breathability Excellent-good Poor Poor Good-poor
Tear/Puncture/abrasion Excellent-good Excellent-good Poor Poor
Wind resistance Excellent Good (degrades with sunlight) Poor (degrades with sunlight) Very poor
Dust resistance Excellent-good Good-poor (static pick up) Good-poor (static pick up) Poor (static pick up)
Cost Moderate High Moderate Low
Cost vs.  life Low High High Moderate

The following tables give the nominal outside cover dimensions.  The Newtonian covers are sized to fit the TeleKit but will also fit common truss Newtonian telescopes manufactured by Discovery, Obsession, Starmaster and Starsplitter.

 They are available in two lengths, the "N" designation for a f/ratio of 4.2-5 or "NS" for a f/ratio of 4.0 or less.

Size A Diameter B C D
8" SCT 28 18 38    
10-12" SCT 32 20 47    
14" SCT 37 24 57    
16" SCT 45 28 73    
Refractor 45 28 96    
           
Size A Diameter B C D
 f/4.2 - f/5          
10-12" N 52 33 30 28 100
14.5" N 58 37 32 32 110
16" N 63 40 34 34 119
18" N 66 42 36 36 129
20" N 70 44 38 38 139
22" N 74 47 38 44 161
24-25" N 80 51 40 46 175
28" N 95 60 50 58 194
30" N 94 62 54 61 208
32" N 98 62 52 60 226
36" N 120 76 70 76 276
           
Size A Diameter B C D
f/4.2 or less          
10-12" NS 52 33 30 28 90
14.5" NS 58 37 32 32 98
16" NS 63 40 34 34 105
18" NS 66 42 36 36 113
20" NS 70 44 38 38 121
22" NS 74 47 38 44 141
24-25" NS 80 51 40 46 153
28" NS 94 60 50 58 168
30" NS 94 60 50 60 178
32" NS 98 62 52 60 196
36" NS 120 76 70 76 24

This drawing at shows the cover laying flat

and will be 2 layers,as in an envelope.

The following table is a guide, large finders, accessories and mounts may require the next larger size.

     Large Telescope Size Chart

  Size Astrosystems Cover Cage Case Transport Case     Size Astrosystems Cover Cage Case Transport Case
Celestron SCT 8" 8" SCT                
  9.25" 10/12" SCT       Orion/GSO/Hardin 8" 10/12 SCT    
              10" 14" SCT    
Discovery             12.5" 16" SCT    
                     
Meade SCT 8"         Starmaster        
  10" 10/12" SCT                
  12" 14" SCT       Starsplitter        
                     
Meade Lightbridge 12" 12.5" N       TeleKit 10"  10-12    
Meade Lightbridge 16" 16" N         12.5/13.1"  10-12 12/14 12
              14.5"  14.5 12/14 14
              16"  16 16/18 16
              17.5/18"  18 16/18 18
Obsession 12.5" 12.5" N 12.5/14.5 12     20"  20 20/22 20
  15" 14.5" N 12.5/14.5 14     22"  22 20/22 22
  18" 18" N 16/18 18     24"  24-25 24/25 24
  20" 20" N 20/22 20     25"  24-25 24/25 25
  25" 24/25" N 24/25 25     28"  28 30 30
              30"  30 30 30
              32"  32 32 32

Additional Information

Name AstroSystems - 22 " Newt. Telescope Cover
Manufacturer AstroSystems
Model AS22N-TC