TeleGizmos 365-series Telescope Cover for 4'' Refractors on Alt-Az or EQ Mounts

TeleGizmos 365-series Telescope Cover for 4" Refractors on Alt-Az or EQ Mounts

  (4 Reviews)
✓ 2 year warranty


1x in stock shipped 1-2 working days

About this product

Model:  telegizmos_t3r4
Part Number:  T3R4

TeleGizmos Warranty

TeleGizmos 365-series covers are warranted for one year from date of delivery including all labor and material. If your cover fails due to either a manufacturing or material defect, TeleGizmos will repair or replace the cover during this warranty period. Proof of purchase required. This warranty is fully transferable but does not include normal wear and tear.

TeleGizmos 365-series are the BEST telescope covers money can buy! 

Suitable for Refractors 76cm (30") long / 101mm (3-4") wide on Alt/Az or Equatorial Mounts. 76cm / 30" major top line, 81cm / 32" major height.

The TeleGizmos 365 series are designed for severe weather protection.

Features an inner layer of aluminised material for radiant heat protection coupled to an outer cover of highly water, UV and mildew-resistant acrylic coated woven polyester. This combination of materials provides years of protection, even when used outside 24/7, 365-days a year. 

The outer material also offers high strength and abrasion resistance with less than 1% shrinkage or stretch. 

Tested in some of the harshest US environments, including the desert southwest, Florida Keys, Colorado @ 8000 feet and the Texas Hill country, the 365 Series has proven itself capable of handling all types of weather.

NOTE: The cover does an excellent job of keeping out the weather but cannot eliminate condensation (the buildup of condensation is sometimes mistaken for a leak). This is true for all telescope covers. So the telescope must be allowed to dry after each use, before applying the cover. If the telescope is used only rarely and/or your area is prone to dew (i.e. in a valley or near a body of water), we recommend you occasionally remove the cover to let the telescope dry. 



  • Multi-layered material for increased protection.
  • Can be used outside for all-weather 24/7, 365-day protection.
  • Highly water resistant acrylic coated woven polyester outer cover.
  • Aluminised inner-layer provides radiant heat protection.
  • Moisture penetration tested at 40 PSI (1/2" concentrated stream).
  • UV and mildew resistant.
  • Can be securely fastened to your scope with built-in draw string.
  • Additional draw string and clips provide extra security around the middle of the cover.

Please note, images are for illustrative purposes and may not show the exact size cover you are ordering.


Outer Canvas: Woven Polyester


Test Method


Control Limits

Weight (oz/yd sq.) 

ASTM D3776


+/- 1.0 oz/yd sq

Tensile (lbs/in.)

ASTM D5034 Warp




ASTM D5034 Fill



Tear (lbs) 

ASTM D2261 Warp




ASTM D2261 Fill  



Water Resistance (Hydro)

AATCC #127

>25 inches

 >25 in. minimum

Water Repellency (Spray)

AATCC #22 

Rating 90

90 minimum

Colour Fastness


Grade 4

4 minimum

Exterior Weather Rating


5 Years


Inner Radiant Barrier: Polyethylene/Astrolar Fiber; Multi layered



Control Limits

Weight (mill) 



Aluminum Dispersion (ohms)

+/- 5%


Tear (lbs)   



Stretch (lbs) 



Water Penetration (Hydro)



Customer reviews

Average Rating (4 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Effective cover for the UK Weaher
29 July 2023  | 

I bought this cover so that I can leave my mount set-up between observing sessions to reduce the amount of time spent polar aligning before observing. So far, due to the British summer, I have been able to use it every day (unusal for astronomy equipment) and can confirm that it does an excellent job of keeping the covered equipment dry. It is quick to put on and take off and comes with an additional draw cord to help further secure it to the equipment.

Rating (max 5):  
TeleGizmos cover
25 January 2022  | 

I've had a much larger cover which I've used for years and has protected my telescope in the garden against all weathers.
New one seems just as robust and well constructed.

Rating (max 5):  
Must have.
22 June 2021  | 

Seems very solid.

Rating (max 5):  
Great cover.
28 May 2020  | 

I bought this cover for my Equinox 80ED Pro setup and it is a great fit. The quality is superb and I am confident it will perform well during winter months. It is light, strong and well insulated.
As I don't have a permanent setup, after a night of observing/photographing, I'm often tempted to leave things out and set up ready for the following night if I'm expecting it to be clear but have always been apprehensive about doing this in case it rains. I feel I can now do this with confidence and everything has actually been left set up and ready to use for 4 consecutive nights now and counting.
I'm so glad I bought this.


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