{"title":"M39 SLR","description":"\u003cp\u003eM39 SLRs use the same 39mm screw mount as early Leica cameras and their various copies. The only difference is the mirror in between, which makes rangefinder lenses unusable on SLRs and vice versa. This mount was only used in the Soviet Union for a few early Zenit cameras before they switched to \u003ca href=\"\/en-int\/collections\/M42\"\u003eM42\u003c\/a\u003e screw mount.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eM39 SLR lenses will not focus properly on LTM rangefinder cameras.\u003c\/strong\u003e\u003c\/p\u003e","products":[{"product_id":"helios-58mm-f2-helios-44-m39-slr-t140129","title":"Helios 58mm f2 Helios-44","description":"It has minor scratches that do not affect image quality. It is otherwise working well. ","brand":"Helios","offers":[{"title":"Default Title","offer_id":53863261897037,"sku":"T140129","price":113.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/9496\/7750\/files\/34_-_LA7547-1.jpg?v=1778236918"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/9496\/7750\/collections\/m39collection.webp?v=1710401592","url":"https:\/\/kamerastore.com\/en-int\/collections\/m39-slr.oembed","provider":"Kamerastore","version":"1.0","type":"link"}