ACRosalino Posted May 18, 2020 Share Posted May 18, 2020 Hi, what is the easiest way to mount a typical 1.25” astro filter (ex. Baader U/Venus) to the back of a camera lens which accepts 39mm filters? I am sure there is an adapter, somewhere...? Link to comment
dabateman Posted May 18, 2020 Share Posted May 18, 2020 Depends on your camera and how much registration distance you have.All that I have seen is using a filter wheel. I have the cheap 9 positions one from Amazon, its about 22mm thick. So you really have to be careful with adapters to M43rds from a M42 or larger mount lens. The lens that works the best is Nikkor 80mm EL, as it has such a large registration distance of about 70mm. 20mm (m43rds mount) + 6mmm (adapter ring) + 22mm (wheel) + 5mm (ring) puts me at 51mm best, which are not many lenses. T-mount and enlarger lenses. I haven't seen any easy clip rings. Seems like people add it inside the camera or will build themselves a mount adapter to house the filter. I also use a dual C-mount short M42 adapter (6mm), with short c-mount to 1.25" adapter inside, then M42 helicoid to the M42 part, then connect the lens for one filter solution.Dual adapters also exist for Sony E-mount. Link to comment
nfoto Posted May 18, 2020 Share Posted May 18, 2020 All depends on how much space is available for a filter placement. Sometimes one can manage to place the filter (semi-)permanently inside a lens adapter, which for any non-native lens to the chosen system would equal 'rear filtering'. I have done that with a 2" Baader into F-m43 adapters. My F-mount lenses for the Z system can use a DIY filter box adapter rebuilt from an astro solution (teleskop-express.de). This allows any filter up to 50mm square, or circular, to be deployed. Link to comment
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