{"product_id":"m55x0-75-male-to-m52x1-female-thread-adapter-adjustable","title":"M55x0.75 male to M52x1 female thread adapter, adjustable","description":"\u003cstyle\u003e#html-body [data-pb-style=C8YNG4T]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}\u003c\/style\u003e\u003cdiv data-content-type=\"row\" data-appearance=\"contained\" data-element=\"main\"\u003e\u003cdiv data-enable-parallax=\"0\" data-parallax-speed=\"0.5\" data-background-images=\"{}\" data-background-type=\"image\" data-video-loop=\"true\" data-video-play-only-visible=\"true\" data-video-lazy-load=\"true\" data-video-fallback-src=\"\" data-element=\"inner\" data-pb-style=\"C8YNG4T\"\u003e\u003cdiv data-content-type=\"text\" data-appearance=\"default\" data-element=\"main\"\u003e\n\u003cul\u003e\n\u003cli\u003eFront side - M52x1 female thread\u003c\/li\u003e\n\u003cli\u003eRear side - M55x0.75 male thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMachined of high quality aluminium alloy.\u003c\/p\u003e\n\u003cp\u003eThis adapter is purposed to adjust relative position of two H-alpha filters for solar observations.\u003c\/p\u003e\n\u003cp\u003eRotating (\"clocking\") seems to have a few benefits:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eit provides freedom in repositioning (rotating) the multiple secondary reflections that's caused by the two H-alpha filters;\u003c\/li\u003e\n\u003cli\u003eit seems that at some positions, the solar disk appears brighter, although this is objectively difficult to tell without actually measuring, say with my astro camera (ZWO ASI174MM Pro). Rotating the most external filter causes some jitter and sag which in themselves affects brightness slightly.\u003c\/li\u003e\n\u003cli\u003emanipulating the \"sweet spot\" (Jacquinot spot). Tilted h-alpha filters can cause banding and reduce the sweet spot of maximum contrast.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e","brand":"RafCamera","offers":[{"title":"Default Title","offer_id":64245287518538,"sku":"808238406478","price":80.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/7158\/5651\/files\/m55x0_75m-to-m52x1f-adj_side_7ffa2e85-eef7-4558-8a80-4f88ba715767.jpg?v=1793910986","url":"https:\/\/www.mjkzz.de\/de\/products\/m55x0-75-male-to-m52x1-female-thread-adapter-adjustable","provider":"MJKZZ.de Europe - Extreme Macro and Panorama Photography","version":"1.0","type":"link"}