In case this might be useful for someone else. I’m shooting the upcoming eclipse with twin R5s. One with a 150-600 Zoom for close up/ corona shots and the other with a wider angle to capture a scenic shot. For the wide angle I have a Thousand Oaks filter which fits easily over the lens and is easy to pull on and off. However, my filter for the Zoom is a fairly expensive Firecrest 95mm glass screw-on filter (ND5.4=18 stops). In my practice sessions, I’ve found that it is difficult to mess with a screw on filter when removing and putting back the filter. I'm afraid if I only lightly screw it on, it might end up falling off at an inopportune time and frying my sensor. So, I had an old paper “DayStar” filter I had bought for 2017 that I wasn’t going to use. What I did was cut out the film from that filter and then use gaff tape to afix my glass filter into this paper filter. Now it’s very easy and fast to pop my glass filter on and off. Perfect solution.
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