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. 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: 2. Does this model come with the appropriate adaptor for Nikon D5300 ??

A: The T mount adapter you need to mount this lens to the D5300 is not included. B&H has many brands of T mount for Nikon. This link will bring them up: https://www.bhphotovideo.com/c/search?setNs=p_PRICE_2%7c0&Ns=p_PRICE_2%7c0&sortType=default&ci=24706&fct=fct_camera-mount_4578%7cnikon%2bfct_a_filter_by%7c03_INSTOCK&srtclk=sort&N=3933929675&

Q: 3. How long is this? What is the thickness of the knob portion?

A: The length is 32mm and the diameter of the knob is 25mm.

Q: 4. Does it fit on sony 6000 e mount body? if not, what is the available adaptors to e mount at B&H?Also, does it work on APS-C sensor?

A: If you add this Bower T-Mount to Sony E Mount Adapter B&H # BOTMSNEX, you can mount the Opteka 420-800mm f/8.3 HD Telephoto Zoom Lens for T Mount to your Sony a6000. Since this lens can cover the larger full frame sensor, it easily covers the smaller APS-C sensor of the Sony a6000.

Q: 5. 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.

Q: 6. 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: 7. Would this fit on a pentax k1?

A: As long as you have T Mount adapter that fits your camera, it will work. Your markings on the lens tube do not always line up on top, if you can live with this detail, then the lens should work just fine for you. Best results are to get a Rail , the long one that is available here will work fine.

Q: 8. What's in the box?

A: Opteka 500mm f/8 Preset Telephoto Lens for T MountFront and Rear Lens CapsLens PouchLimited 10-Year Warranty

Q: 9. Will this work on AIDA HD100 cameras?

A: Yes, the Marshall Electronics 10MP 2.8mmm f/1.6 Wide-Angle CS-Mount Manual Iris Lens is compatible with the AIDA Imaging Full HD HDMI Camera with TRS Stereo Audio Input.

Q: 10. 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 )