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
5MP HD 2.1mm CCTV Lens 5.0Megapixel IP Camera Lenses MTV Board IR M12 Lens F2.0 1/2.5" Image Format For HD Security Cameras
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
DIY handicrafts C1 Mark I Large Format Cardboard Camera / Digital Large Format Camera
Aliexpress UK
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.
eBay
Shen Hao HZX 57-IIA 5x7 Folding Large Format Film Camera with Bellows Ground Glass SH Black Walnut Photographic Camera
Aliexpress UK
Compur shutter fires well at all speeds - B works, flash sync works, aperture and shutter blades clean. 150mm Symmar-S standard lens for 5x4". Glass has no fungus, no scratches.
eBay
Three Lens PTZ IP Camera Outdoor 6K HD Three Screens WiFi Security Camera Auto Tracking 12MP Dual Lens Wirelss CCTV Camera iCsee
Aliexpress UK
This is a good but not perfect Symmar 240mm f5.6 wide angle lens for 10x8" format. Personally I would use the lens with hesitation. All speeds look and sound accurate but not professionally checked for accuracy.
eBay
JIENUO 6mm Lens HD Fixed Iris Surveillance Security M12 Aperture Image Format Video For CCD CCTV Camera Ip Digital Analog System
Aliexpress UK
In good used EXC+ condition. Aperture blades glide smoothly in and out. Lenses would be optically clean. Lenses may have dust and minor optical blemishes, which wouldn't affect image quality. Lenses may have dusty and/or optical blemishes which shouldn't affect image quality.
eBay
M12 2MP 16MM Pinhole Lens with 650nm IR Filter HD 2.0Megapixel 1/2.7" Image Format F2.0 for CCTV IP Security Surveillance Camera
Aliexpress UK
eBay
HD 5MP M12 Mount Lens 8MM 12MM 16MM with 650nm IR Filter Aperture F2.0 Format 1/2.5" for Surveillance Security CCTV Cameras
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
HD 8MP M12 Mount Lens 2.96mm 152° Wide Angle Aperture F1.6 Format 1/1.8" With 650nm Filter For Surveillance Security CCTV Camera
Aliexpress UK