{"product_id":"bronica-etr-135n-to-135w-conversion-kit-stl-3mf-files","title":"Bronica SQ \u0026 ETR 135N to 135W conversion kit: STL \u0026 3MF files","description":"\u003cp\u003eEverything you need to print the parts to convert a 135N 35mm back for Bronica SQ or ETRS (es, confirmed to work with both) to a 135W back so you can natively shoot 35mm panoramas. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe 135W back is very rare, and very expensive item - so this is a relatively inexpensive approach, with just the cost of a 135N back and these conversion kit files to consider.\u003c\/p\u003e\n\u003cp\u003eBronica was pretty clever with these backs. The 135N and 135W were identical except for the size of the gear and the presence of the pin. That allowed them to manufacture the same outer shell and film carrier insert, and at the very end of the process just those two particular components would decide whether it went out as a 135N or 135W. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFiles Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ereplacement gear\u003c\/li\u003e\n\u003cli\u003ereplacement film gate \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eviewfinder film mask\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHardware required:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2x bearings for the roller - \u003ca rel=\"noopener\" href=\"https:\/\/www.amazon.co.uk\/dp\/B082PW27VY\" target=\"_blank\"\u003e682ZZ Ball Bearings 2x5x2.3mm\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDownload the \u003ca href=\"https:\/\/delivery.shopifyapps.com\/-\/1640500088a06712\/f156d55240b68263\" rel=\"noopener\" target=\"_blank\"\u003econversion guide with detailed instructions\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eI suggest printing the gear at least with a 0.2mm nozzle at a layer height of 0.08mm using PETG or PETG-CF. Give it six walls and 85% gyroid infill. \u003c\/em\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"IDENTIDEM.design","offers":[{"title":"Default Title","offer_id":52823267082507,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6773\/2491\/files\/Screenshot2026-01-14at18.16.21.png?v=1768414716","url":"https:\/\/identidem.design\/products\/bronica-etr-135n-to-135w-conversion-kit-stl-3mf-files","provider":"IDENTIDEM.design","version":"1.0","type":"link"}