NO! NO! NO!
These cheap “filters” are manufactured and marketed as being able to be inserted into the eyepiece. That means that by the time they get to the filter, all the Sun’s rays have gone through … Read More »
ONLY if you have a special solar filter that fits over the end of the scope (not at the eyepiece!), AND you know how to use it! Those are about $200 each, so you should know whether you have one or not!
Ditto for binoculars – if you bring … Read More »