NEW MOD! - I made a Petzval-like SX-70 - a talk about custom lenses on instant cameras

theinstantcameraguy December 24, 2025
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This video dives into a new SX-70 mod I've discovered, and also discusses previous custom lenses I've mounted to cameras. I'm regularly asked about the possibility of custom lenses on SX-70 cameras. Mounting a standard large format lens for example is insanely difficult, if not impossible for reasons that I discuss in the video But my new mod offers perhaps the next best thing This mod effectively mimics the design of a Petzval lens, producing a sharp centre with blurred edges when shooting at wider apertures. This makes it amazing for portrait photos and produces drastically different bokeh to a standard SX-70 If you found this tip helpful - please say thanks by buying me a beer or two! https://ko-fi.com/theinstantcameraguy *Getting artifacts in the video? For best quality, manually select 1080p quality, as depending on your bandwidth, YouTube may default to 720p - and YouTube's 720p compression looks like garbage* ------------------------------------------------------------------------------------------------------------------------------------------------- Chapters: 00:00 - Intro 02:18 - Theme song 02:34 - A discussion about custom lenses I've mounted in the past 06:46 - My custom Mamiya C220 09:44 - Custom lenses on SLRs 11:30 - Custom rangefinder lenses 14:19 - Why SX-70 lens mods are hard 19:00 - A petzval-like mod is possible! 19:26 - Brief history of the Petzval 22:12 - How the mod works 26:19 - Sample photos 31:15 - Sample scans 32:15 - Which cameras can be modded? 33:00 - Samples by Rhys 35:07 - Some end of year announcements 36:00 - Need help? Try these resources 36:25 - I'll be selling the prototype. First in gets it. 37:04 - Rhys' gallery ------------------------------------------------------------------------------------------------------------------------------------------------- Videos you might like: Linus Johnson's video on the camera I built him: https://www.youtube.com/watch?v=SayrMGyGum0 No frog tongue? No problem! Tips for shooting the SX-70 in bright sun! https://youtu.be/XZsLZZ_8xls Overhaul or Not at All: The Importance of Servicing your SX-70 https://youtu.be/PEMsFa5q32g The SX-70R PCB https://youtu.be/eTm0L0xm6Cc The PolaVolt https://youtu.be/x8RvxlTctgU Sticky Pack Syndrome megathread: https://www.reddit.com/r/Polaroid/comments/1nq3g2v/sticky_pack_syndrome_megathread_aka_the_causes_of/ ------------------------------------------------------------------------------------------------------------------------------------------------- Got a Polaroid that needs some love? Hit me up! https://www.facebook.com/instantcameraguy https://www.instagram.com/theinstantcameraguy/ https://www.theinstantcameraguy.com

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