Obviously it covers 9x12cm which is just a little smaller than 5x4" of course! 15cm f2.7 is about as fast as a large format lens will get. Viewfinder fine. The lens is also good. No fungus, no scratches, no separation.
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Tuya Smart 4MP 2.5K Dual-Lens Large wide 180°Security Camera , Outdoor Camera,With Color Night Vision/Siren/2-Way Talk IP Camera
Aliexpress UK
The shutter is a copal 00 size. Smaller than a copal 0 size and therefore a little bit more fiddly to use. Shutter fires okay at all speeds. Small shutter or not, this is a still a good lens and should perform well.
eBay
Neye 4K/8MP Wireless WiFi Camera 1080P Dual Lens Dual Screen Outdoor Home Head IP Camera CCTV Dual Lens Security Camera
Aliexpress UK
150mm Symmar standard lens for 5x4". Compur shutter (copal 1 size) fires well at all speeds - B works, flash sync works, aperture and shutter blades clean. Glass has no fungus, no scratches. Lens will perform very well.
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HD 6K 12MP 3 Lens Camera 6MP Triple Lens Outdoor Camera System AI Human Detection WiFi CCTV Waterproof iCsee App Video Security
Aliexpress UK
That said though, this is a great lens, quite old now, but will perform fine as a standard on 10x8". when changing shutter speeds before firing off an shot. One shutter blade has a little mild corrosion but functions fine.
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Three Screen Three Lens 15MP HD WIFI IP Camera 10MP Dual Lens Camera Onvif PTZ Auto Tracking CCTV Video Security Cam Yoosee
Aliexpress UK
Lens is not perfect but I am sure it will perform just fine. They look like they will wipe away but they don't! They are actual scratches! Not an issue as such, just a niggle!
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Universal HD 8/12/18/20/28/36X Optical Zoom Camera External Telephoto Lens with Clip Smartphone Camera Lens for Distant View
Aliexpress UK
A large and heavy wide angle for 10x8" format, Schneider Super Angulon 165mm f8. All shutter speeds are working fine, B and T work but 1 second is slightly hesitant to close (maybe 1.5 seconds). Nothing that will effect performance.
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15MP 6K HD Three Lens 3-Screens WIFI IP Camera Outdoor Dual Lens 10MP 5K PTZ Camera Ai Auto Tracking CCTV Video Security Camera
Aliexpress UK
Front lens cap, Rear lens cap. By weight and shape of each product, I use 13 kind of cushioning materials and pursue safety and weight reduction. There are no large dusts. scuffs from normal use.
eBay
4K Wireless Security IP Camera ICsee Dual-Lens Human Detection Outdoor Night Vision 8MP Dual Lens Wifi Surveillance Camera
Aliexpress UK
Front lens cap, Rear lens cap. By weight and shape of each product, I use 13 kind of cushioning materials and pursue safety and weight reduction. Serial Number;. tiny scuffs from normal use. Weekends are not available because office is closed.
eBay
V380 Solar Camera 4K 4G Sim 8MP Dual Lens Wireless WiFi Monitoring Camera PIR Mobile Detection Outdoor Safety Waterproof Camera
Aliexpress UK