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The German manufacturer euro EMC offers solar observation filters under the name SF 100. The filter material is Baader's much proven AstroSolar film with an optical density of 5 - ideal for safe visual observing.

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Euro EMC Sf100 Funktionsprinzip

Here's how it works: The film is framed by two aluminium rings. The frame can then be firmly attached to the front opening of the telescope by means of adjustable pins. In this way, the intense light from the Sun does not even get into the optics.

Which filter fits your telescope? The selection list (PDF) or the table below show you all the available filter sizes. For each size, you can see the outer diameter measurement to which the filter can be attached.

It is not possible to determine the filter size directly from the telescope aperture, since a dew shield is attached to many instruments. So it's best to measure the outside diameter of your telescope yourself.

Für Teleskope

Size
External clamping range (mm)
Internal clamping range (mm)
Article number
2
57 - 71
72 - 84
45539
3
70 - 85
85 - 96
45540
4
83 - 105
99 - 115
45541
5
103 - 131
123 - 146
45542
6
129 - 157
149 - 172
45543
7
155 - 189
175 - 204
45544
8
187 - 221
207 - 236
45545
9
215 - 273
240 - 293
45546
10
269 - 327
294 - 347
45547
11
323 - 381
348 - 401
45548
12
375 - 439
400 - 459
45549
13
433 - 497
458 - 517
45550
14
520 - 584
545 - 602
63624

For binoculars

Size
External clamping range (mm)
Minimum centre-to-centre lens distance (mm)
Article number
1B
48 - 61
66
45538
2B
57 - 71
78
59774
Euro EMC Sf100 Serie