The SL1250A 12-50mm CS-Mount 4K Telephoto DC Auto-Iris Varifocal Lens from Theia Technologies is designed for image sensors from 1/2.3" up to 1/1.7". The lens is designed to be very compact so it can be used in small enclosures such as 4" domes.

This lens is designed for use on 4K box cameras for security and machine vision applications such as long distance fence line monitoring, license plate recognition (LPR) and other long distance security applications.  

The lens can be used on cameras up to 12MP resolution (true 4K) giving a crisp image from edge to edge.

Designed for image sensors from 1/2.3" up to 1/1.7"

For use on 4K box cameras, 4" domes

Used in security and machine vision applications such as long distance fence line monitoring, license plate recognition (LPR) and other long distance security applications

Can be used on cameras up to 12MP resolution (true 4K)

Related Questions and Answers

Q: 1. will this lens work with and Olympus OM or a Pentax K1000? If an adapter is required, will two different ones be needed or just one?

A: You would need T-mount to any camera adapter (T-mount to Olympus OM , T-mount to Pentax K )

Q: 2. Is this lens compatible with Canon M50 mirrorless camera?

A: This is a T mount lens which means that you can get an adapter for almost any interchangeable camera lens mount -- including the EF-M mount that the Canon M50 uses. Here's the right such adapter for using this lens with your M50: Vivitar T-Mount to Canon EF-M Mount Adapter B&H # VIHFT2EOSM https://bhpho.to/38M0yUV

Q: 3. Can this lens be mounted on Canon 1300D?

A: You'll need a T-mount to EOS EF-S adapter like this one: https://bhpho.to/39F0FAY https://bhpho.to/2XUn5bC

Q: 4. Would this lens be suitable for photographing a solar eclipse (with appropriate filters)?

A: It is capable of producing an acceptable result although not as sharp as a traditional lens. Whilst I have had some success hand-held, a tripod is best as there is no shake reduction with this lens. Be aware that the filters are rear mounted (mine came with an ND filter and a couple of others).

Q: 5. will this work with the nikon d3500?

A: To fit this lens to the Nikon D3500, you would need the Vello T-Mount Lens to Nikon F-Mount Camera Lens Adapter, BH # VELANFT. http://bhpho.to/2KGl6ow

Q: 6. Does this one work on Nikon D90? Thanks.

A: Yes, you will need a T-mount adapter for Nikon to use this lens and it is manual focus and manual exposure only.

Q: 7. Will this lense work with nikon d3400

A: You will need a T mount adapter ($10) and set the camera to manual. The lens is totally manual with a fixed f stop.

Q: 8. Is it compatible with Sony A7S III ?

A: Yes, the Opteka 420-800mm f/8.3 HD Telephoto Zoom Lens for T Mount is compatible with the Sony A7S III Camera as long as you use an E-mount adapter like the Vello T-Mount Lens to Sony E-Mount Camera Lens Adapter, B&H # VELANEXT. Set the camera to manual mode and in the camera menu, select the option to release the shutter without a lens attached.

Q: 9. What is the maximum range of this lens?

A: This lens has an angle of view of 5and minimum focus distance of 33' (10.06 m). It does not have a zoom, so there is no range. Technically if you put it to f/22 the lens will be in focus from 33 feet to infinity.

Q: 10. Work on a D5000 nikon?

A: You may purchase the Vello T-Mount Lens to Nikon F-Mount Camera Lens Adapter, B&H # VELANFT, to connect the Opteka 500mm f/8 HD Telephoto Mirror Lens for T Mount to the Nikon D5000 DSLR camera. Do note that the Opteka 500mm f/8 HD Telephoto Mirror Lens for T Mount is a fully manual lens, and as such, you will have to place the camera in full manual mode and set your exposure manually to use the above lens. The camera's shutter will not release if the camera is not set to full Manual mode.