Thousand OaksFull Aperture (Solarlite Polymer) 95mm/3.75"



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What Size Do I Order?

How to Measure Outside DiameterThe size chart below lists sizes by clear aperture (filter size in center of cell) and outside diameter (O.D.) of aluminum cell (inside cell wall that fits over and around telescope tube). The O.D. of our cells needs to be at least 1/16″ larger than the OD of the telescope tube or binocular barrel etc. Choose the closest cell O.D. that is LARGER than the O.D. measurement of your instrument. Example: Part number S-4250 (4 1/4″ O.D.) would fit instrument O.D. measurements from 4″ to 4-3/16″. Do not choose a size the same as your O.D. since it will be too tight. Self adhesive felt is included for custom fitting. If your application requires additional felt; Velcro, felt, and other types of material can be found at most fabric or home improvement stores. We cannot take orders for felt.


If the solar filter is to be used on an open truss telescope, the open area from front (secondary mirror) to back (primary mirror) must be covered. No direct sunlight should enter the optical path or the concentrated beam from the mirror can focus on the back of the solar filter film and cause damage and void warranty.

40mm\1.50″ 50mm\2.00″ S-2000
45mm\1.75″ 60mm\2.32″ S-2325
50mm\2.00″ 70mm\2.75″ S-2750
60mm\2.37″ 76mm\3.00″ S-3000
60mm\2.37″ 82mm\3.25 S-3250
80mm\3.15″ 90mm\3.50″ S-3500
80mm\3.15″ 95mm\3.75″ S-3750
80mm\3.15″ 101mm\4.00″ S-4000
90mm\3.50″ 108mm\4.25″ S-4250
101mm\4.00″ 114mm\4.50″ S-4500
101mm\4.00″ 120mm\4.75″ S-4750
101mm\4.00″ 127mm\5.00″ S-5000
101mm\4.00″ 133mm\5.25″ S-5250
114mm\4.50″ 139mm\5.50″ S-5500
127mm\5.00″ 146mm\5.75″ S-5750
127mm\5.00″ 152mm\6.00″ S-6000
127mm\5.00″ 158mm\6.25″ S-6250
127mm\5.00″ 165mm\6.50″ S-6500
152mm\6.00″ 181mm\7.12″ S-7125
152mm\6.00″ 190mm\7.50″ S-7500
152mm\6.00″ 203mm\8.00″ S-8000
177mm\7.00″ 212mm\8.37″ S-8375
177mm\7.00″ 222mm\8.75″ S-8750
203mm\8.00″ 236mm\9.312″ S-9187
203mm\8.00″ 241mm\9.50″ S-9500
203mm\8.00″ 247mm\9.75″ S-9750
203mm\8.00″ 254mm\10.00″ S-10000
203mm\8.00″ 266mm\10.50″ S-10500
228mm\9.00″ 273mm\10.75″ S-10750
254mm\10.00″ 292mm\11.50″ S-11500
254mm\10.00″ 305mm\12.00″ S-12000
254mm\10.00″ 311mm\12.25″ S-12225
279mm\11.00″ 317mm\12.50″ S-12500
254mm\10.00″ 330mm\13.00″ S-13000
304mm\12.00″ 349mm\13.75″ S-13750
317mm\12.50″ 387mm\15.25″ S-15250
355mm\14.00″ 406mm\16.00″ S-16000
355mm\14.00″ 432mm\17.00″ S-17000
355mm\14.00″ 447mm\17.625″ S-17625